MF研究者総覧

研究者データベース

詳細
岡本　淳(オカモト　アツシ)
情報科学研究院　情報エレクトロニクス部門　先端エレクトロニクス分野
准教授
researchmap個人ページ
Last Updated :2023/12/05

基本情報

所属

  • 情報科学研究院　情報エレクトロニクス部門　先端エレクトロニクス分野

職名

  • 准教授

学位

  • 工学博士（北海道大学）
  • 工学修士（北海道大学）

ホームページURL

J-Global ID

研究キーワード

  • フォトリフラクティブ効果   ホログラフィ   光情報処理   情報光学   光衛星間通信   光通信   位相共役光学   非線形光学   光エレクトロニクス   光インターコネクション   光記録   光メモリ   Optical intersatelite communication   Optical communication   Phase Conjutation   Nonlinear Optics   Optoelectronics   Self organization   Optical interconnection   Holographic memory   Optical storage   Optical memory   

研究分野

  • ものづくり技術（機械・電気電子・化学工学） / 通信工学
  • ものづくり技術（機械・電気電子・化学工学） / 電子デバイス、電子機器
  • ナノテク・材料 / 光工学、光量子科学

担当教育組織

職歴

  • 2007年 - 北海道大学准教授（情報科学研究科先端エレクトロニクス講座) 准教授

所属学協会

  • 電子情報通信学会   日本光学会   The Optical Society of America(OSA)   Optical Society of Japan   IEICE(The Institute of Electronics, Information and Communication Engineers)   

研究活動情報

論文

  • Virtual phase conjugation based optical tomography for single-shot three-dimensional imaging
    Yuta Goto, Atsushi Okamoto, Atsushi Shibukawa, Kazuhisa Ogawa, Akihisa Tomita
    Optics Express 26 4 3779 - 3790 2018年02月 [査読有り][通常論文]
  • Shimpei Shimizu, Atsushi Okamoto, Fumiya Mizukawa, Kazuhisa Ogawa, Akihisa Tomita, Taketoshi Takahata, Satoshi Shinada, Naoya Wada
    Applied Optics 57 2 146 - 153 2018年01月10日 [査読有り][通常論文]
     
    Volume holographic demultiplexers (VHDMs) provide spatial mode demultiplexing using simple optical systems. However, applying VHDM to practical optical communication systems is difficult, as typical holographic media have no sensitivity in the infrared region, which includes optical transmission bands. In this paper, we propose a VHDM scheme combined with a dual-wavelength method (DWM). Using the DWM, VHDMs are able to perform mode demultiplexing in the optical transmission bands. We experimentally demonstrated the basic operation of our proposal using experiments performed at an 850-nm wavelength. In addition, we performed numerical simulations to investigate the application of VHDM to the C-band.
  • Shimpei Shimizu, Atsushi Okamoto, Fumiya Mizukawa, Kazuhisa Ogawa, Akihisa Tomita, Taketoshi Takahata, Satoshi Shinada, Naoya Wada
    22nd Microoptics Conference, MOC 2017 2017- P-62 260 - 261 2018年01月02日 [査読有り][通常論文]
     
    We demonstrated the mode-group demultiplexing technique based on a volume holographic demultiplexer (VHDM) for mode-group division multiplexing transmission using multi-mode fibers. In the experiment, the VHDM achieved the separating of three mode-group channels with a single holographic recording medium. Thus, the modal cross-talk was obtained as -14.7 dB.
  • Yuta Goto, Atsushi Okamoto, Kazuhisa Ogawa, Akihisa Tomita
    22nd Microoptics Conference, MOC 2017 2017- PD5 358 - 359 2018年01月02日 [査読有り][通常論文]
     
    We propose virtual-phase-conjugation based optical tomography (VPC-OT) incorporated with the compensation of the optical aberration for improving the imaging quality. The compensation scheme is implemented by optically measuring the transmission function of the beam propagation. Then, we confirmed that this scheme greatly improves the signal level of VPC-OT.
  • Tomohiro Maeda, Atsushi Okamoto, Kazuhisa Ogawa, Akihisa Tomita, Yuta Wakayama, Takehiro Tsuritani
    22nd Microoptics Conference, MOC 2017 2017- C-4 68 - 69 2018年01月02日 [査読有り][通常論文]
     
    We propose a selective mode conversion method using dual-phase modulation which performs the full-complex amplitude modulation by use of two phase-type spatial light modulators. In the experiment, the crosstalk to undesired spatial mode was supressed less than -21.2 dB for the 4-LP modes of a few-mode fiber.
  • Selective spatial mode attenuator using phase-intensity-phase modulation toward mode-division multiplexing transmission
    Zihan Zhou, Atsushi Okamoto, Shimpei Shimizu, Kazuhisa Ogawa, Akihisa Tomita, Yuta Wakayama, Takehiro Tsuritani
    SPIE Photonics West 2018 (PW2018) 10561-15 2018年 [査読有り][通常論文]
  • Measurement of differential mode delay using reference-free low-coherence digital holography
    Shogo Hoshino, Atsushi Okamoto, Yuta Goto, Kazuhisa Ogawa, Akihisa Tomita, Yuta Wakayama, Takehiro Tsuritani
    SPIE Photonics West 2018 (PW2018) 10561-12 2018年 [査読有り][通常論文]
  • Kosuke Fukui, Akihisa Tomita, Atsushi Okamoto
    PHYSICAL REVIEW LETTERS 119 18 180507-1 - 180507-4 2017年11月 [査読有り][通常論文]
     
    To implement fault-tolerant quantum computation with continuous variables, Gottesman-Kitaev-Preskill (GKP) qubits have been recognized as an important technological element. However, the analog outcome of GKP qubits, which includes beneficial information to improve the error tolerance, has been wasted, because the GKP qubits have been treated as only discrete variables. In this Letter, we propose a hybrid quantum error correction approach that combines digital information with the analog information of the GKP qubits using a maximum-likelihood method. As an example, we demonstrate that the three-qubit bit-flip code can correct double errors, whereas the conventional method based on majority voting on the binary measurement outcome can correct only a single error. As another example, we show that a concatenated code known as Knill's C-4/C-6 code can achieve the hashing bound for the quantum capacity of the Gaussian quantum channel (GQC). To the best of our knowledge, this approach is the first attempt to draw both digital and analog information to improve quantum error correction performance and achieve the hashing bound for the quantum capacity of the GQC.
  • Spatial mode demultiplexing technique using angularly multiplexed volume holograms with a phase plate
    Shimpei Shimizu, Atsushi Okamoto, Fumiya Mizukawa, Kazuhisa Ogawa, Akihisa Tomita, Taketoshi Takahata, Satoshi Shinada, Naoya Wada
    Japanese Journal of Applied Physics 56 98 09NA05-1 - 09NA05-5 2017年08月 [査読有り][通常論文]
  • Improvement of Conversion Accuracy in Volume Holographic Mode-Demultiplexing Converter Using Shaped Beams
    Fumiya Mizukawa, Atsushi Okamoto, Yuta Goto, Shimpei Shimizu, Kazuhisa Ogawa, Akihisa Tomita
    International Workshop on Holography and Related Technologies 2017 (IWH2017) P2 2017年 [査読有り][通常論文]
  • Design of Complex Amplitude Modulation for Suppressing Optical Loss in Mode Conversion by Considering Radiation Modes
    Tomohiro Maeda, Atsushi Okamoto, Kazuhisa Ogawa, Akihisa Tomita
    International Workshop on Holography and Related Technologies 2017 (IWH2017) P9 2017年 [査読有り][通常論文]
  • Multiplexing and Demultiplexing of Digital Images using Virtual Phase Conjugation for High-Density Holographic Data Storage
    Yuta Goto, Atsushi Okamoto, Kazuhisa Ogawa, Akihisa Tomita
    International Workshop on Holography and Related Technologies 2017 (IWH2017) P10 2017年 [査読有り][通常論文]
  • Spatial Mode Separation and Conversion Technique Using Volume Hologram with a Random Optical Diffuser
    Fumiya Mizukawa, Atsushi Okamoto, Yuta Goto, Shimpei Shimizu, Kazuhisa Ogawa, Akihisa Tomita
    27th International Symposium on Imaging, Sensing, and Optical Memory 2017 (ISOM’17) Tu-J-35 2017年 [査読有り][通常論文]
  • Experiment on Spatial Mode Demultiplexing Technique Using Cascaded Volume Hologram
    Shimpei Shimizu, Atsushi Okamoto, Fumiya Mizukawa, Kazuhisa Ogawa, Akihisa Tomita, Taketoshi Takahata, Satoshi Shinada, Naoya Wada
    27th International Symposium on Imaging, Sensing, and Optical Memory 2017 (ISOM’17) Tu-J-25 2017年 [査読有り][通常論文]
  • Multiplexing Technique using Virtual Phase Conjugation for High-Density Holographic Data Storage Systems
    Yuta Goto, Atsushi Okamoto, Masanori Takabayashi, Akihisa Tomita
    27th International Symposium on Imaging, Sensing, and Optical Memory 2017 (ISOM’17) Tu-PP-02 2017年 [査読有り][通常論文]
  • Optimization of Volume Holographic Spatial Mode Demultiplexer with a Phase Plate Using Simulated Annealing
    Shimpei Shimizu, Atsushi Okamoto, Fumiya Mizukawa, Kazuhisa Ogawa, Akihisa Tomita, Taketoshi Takahata, Satoshi Shinada, Naoya Wada
    International Workshop on Holography and Related Technologies 2017 (IWH2017) 23a3 2017年 [査読有り][通常論文]
  • Experiment on spatial mode separation and conversion technique using volume hologram
    Fumiya Mizukawa, Atsushi Okamoto, Yuta Goto, Shimpei Shimizu, Kazuhisa Ogawa, Akihisa Tomita
    7th EOS Topical Meeting on Optical Microsystems (OµS’17) 35 2017年 [査読有り][通常論文]
  • Experiment on spatial mode demultiplexer based on angularly multiplexed volume hologram at 850 nm wavelength with dual-wavelength method
    himpei Shimizu, Atsushi Okamoto, Fumiya Mizukawa, Kazuhisa Ogawa, Akihisa Tomita, Taketoshi Takahata, Satoshi Shinada, Naoya Wada
    7th EOS Topical Meeting on Optical Microsystems (OµS’17) 22 2017年 [査読有り][通常論文]
  • Depth-resolution characterization of optical tomography using virtual phase conjugation
    Yuta Goto, Atsushi Okamoto, Atsushi Shibukawa, Kazuhisa Ogawa, Akihisa Tomita, Kunihiro Sato
    7th EOS Topical Meeting on Optical Microsystems (OµS’17) 5 2017年 [査読有り][通常論文]
  • Kensuke Nakata, Akihisa Tomita, Mikio Fujiwara, Ken-ichiro Yoshino, Akio Tajima, Atsushi Okamoto, Kazuhisa Ogawa
    OPTICS EXPRESS 25 2 622 - 634 2017年01月 [査読有り][通常論文]
     
    Security certification of quantum key distribution (QKD) systems under practical conditions is necessary for social deployment. This article focused on the transmitter, and, in particular, investigated the intensity fluctuation of the optical pulses emitted by a gain-switched semiconductor laser used in QKD systems implementing decoy-BB84 protocol. A large intensity fluctuation was observed for low excitation, showing strong negative correlation between the adjacent pulses, which would affect the final key rate. The fluctuation decreased and the correlation disappeared as excitation increased. Simulation with rate equations successfully reproduced the experimental results and revealed that the large fluctuation originates from an intrinsic instability of gain-switched lasers driven periodically at a rate comparable to the inverse of carrier lifetime, as in GHz-clock QKD systems. Methods for further reduction of the intensity fluctuation were also discussed. (C) 2017 Optical Society of America
  • Multi-Layered Holographic Memory using Virtual Phase Conjugation
    Yuta Goto, Atsushi Okamoto, Kazuhisa Ogawa, Akihisa Tomita, Kunihiro Sato
    Technical Digest of the International Workshop on Holography 2016 (IWH 2016) 60  2016年11月 [査読有り][通常論文]
  • Phase measurement of a tilted plane mirror using the derivative estimation of a single hologram
    Jin Nozawa, Atsuhshi Okamoto, Yasuyuki Kuno, Masataka Toda, Kazuhisa Ogawa, Akihisa Tomita
    Technical Digest of the International Workshop on Holography 2016 (IWH 2016) 17  2016年11月 [査読有り][通常論文]
  • Performance Evaluation of High Speed Full Motion Simulator for Holographic Memory Based on 3D FFT-BPM with GPU Acceleration
    Hisatoshi Funakoshi, Atsushi Okamoto, Satoshi Honma
    Technical Digest of International Symposium on Optical Memory 2016 (ISOM 2016) Tu-J-03 2016年10月 [査読有り][通常論文]
  • Accuracy evaluation of phase shifting digital holography using virtual interferogram-generation algorithm
    Jin Nozawa, Atsuhshi Okamoto, Kazuhisa Ogawa, Akihisa Tomita, Kunihiro Sato
    Technical Digest of International Symposium on Optical Memory 2016 (ISOM 2016) Tu-J-17 2016年10月 [査読有り][通常論文]
  • Multiplexing Technique using Virtual Phase Conjugation for High-Density Holographic Data Storage Systems
    岡本 淳
    Yuta Goto, Atsushi Okamoto, Masanori Takabayashi, and Akihisa Tomita We-L-03 2016年10月 [査読有り][通常論文]
  • Spatial Mode Separation and Interconversion Using Volume Hologram
    Fumiya Mizukawa, Atsushi Okamoto, Yuta Goto, Shimpei Shimizu, Satoshi Honma, Kazuhisa Ogawa, Akihisa Tomita
    Technical Digest of International Symposium on Optical Memory 2016 (ISOM 2016) Tu-I-04 2016年10月 [査読有り][通常論文]
  • Effective Mode Demultiplexing Technique Using Angularly Multiplexed Volume Holograms with a Phase Plate
    Shimpei Shimizu, Atsushi Okamoto, Fumiya Mizukawa, Taketoshi Takahata, Shusaku Noda, Naoya Wada, Kazuhisa Ogawa, Akihisa Tomita
    Technical Digest of International Symposium on Optical Memory 2016 (ISOM 2016) Tu-I-03 2016年10月 [査読有り][通常論文]
  • Yuta Goto, Atsushi Okamoto, Yuta Wakayama, Kazuhisa Ogawa, Jin Nozawa, Akihisa Tomita, Takehiro Tsuritani
    OPTICS EXPRESS 24 21 24739 - 24749 2016年10月 [査読有り][通常論文]
     
    To obtain a phase distribution without the use of an optical path besides an object beam, a reference-free holographic diversity interferometry (RF-HDI) has been proposed. Although the RF-HDI can generate an internal reference beam from the object beam, the method has a problem of measurement accuracy due to insufficient power of the internal reference beam. To solve the problem, we newly propose a RF-HDI via iterative measurements. Our method improves the measurement accuracy by utilizing iterative measurements and feedback of each obtained phase image to the measurement system. In the experiment, the phase image, which has a random pattern, can be measured as an object beam with a higher accuracy than in the conventional RF-HDI. To support this result, we also evaluated the wavefront accuracy and optical power efficiency of an internal reference beam in this method. As a result, we verified that our method enables us to generate an internal reference beam that has the wavefront of a near single plane wave and a higher power efficiency than the conventional RF-HDI. In addition, our method can be applied to measurement for the modal content in an optical fiber, atmosphere turbulence, etc., where it is difficult to prepare an external reference beam with a high coherency. (C) 2016 Optical Society of America
  • Taisuke Eto, Masanori Takabayashi, Atsushi Okamoto, Masatoshi Bunsen, Takashi Okamoto
    JAPANESE JOURNAL OF APPLIED PHYSICS 55 8 08RD01.1 - 08RD01.7 2016年08月 [査読有り][通常論文]
     
    A three-dimensional (3D) shift multiplexing technique is applied to increase the number of multiplexed datapages in self-referential holographic data storage (SR-HDS), enabling holographic recording with purely one-beam geometry. In the 3D shift multiplexing technique, the recording medium is shifted not only along the x-and y-axes but also along the z-axis to multiplex the datapages. Because the shift directions in the 3D shift multiplexing technique are expanded compared with the conventional 2D technique, the number of multiplexed datapages is expected to be increased. We numerically clarify the appropriate 3D recording layout of holograms in which the effect of the inter-page crosstalk can be reduced after showing that datapages are multiplexed on shifting the recording medium along the z-axis. The results show 3D shift multiplexing can effectively realize high-density SR-HDS when appropriately designed layouts are used. (C) 2016 The Japan Society of Applied Physics.
  • Yuta Goto, Atsushi Okamoto, Masataka Toda, Yasuyuki Kuno, Jin Nozawa, Kazuhisa Ogawa, Akihisa Tomita
    JAPANESE JOURNAL OF APPLIED PHYSICS 55 8 08RE04.1 - 08RE04.6 2016年08月 [査読有り][通常論文]
     
    We propose a digital confocal microscope using a virtual 4f-system based on numerical beam propagation for depth measurement without mechanical scanning. In our technique, the information in the sample target along the depth direction is obtained by defocusing the virtual 4f-system, which consists of two virtual lenses arranged in a computer simulation. The principle of our technique is completely different from that of the mechanical scanning method used in the conventional confocal microscope based on digital holography. By using the virtual 4f-system, the measurement and exposure time can be markedly reduced because multilayered tomographic images are generated using a single measurement. In this study, we tested the virtual depth imaging technique by measuring cover glasses arranged along the depth direction. (C) 2016 The Japan Society of Applied Physics
  • 岡本 淳
    Jin Nozawa, Atsushi Okamoto, Kazuhisa Ogawa, and Akihisa Tomita 24 21 24002 - 24017 2016年 [査読有り][通常論文]
  • Fumiaki Matsuoka, Akihisa Tomita, Atsushi Okamoto
    Physical Review A 93 032308  2016年 [査読有り][通常論文]
  • Jin Nozawa, Atsushi Okamoto, Atsushi Shibukawa, Masanori Takabayashi, Akihisa Tomita
    APPLIED OPTICS 54 29 8644 - 8652 2015年10月 [査読有り][通常論文]
     
    We propose a two-channel holographic diversity interferometer (2ch-HDI) system for single-shot and highly accurate measurements of complex amplitude fields with a simple optical setup. In this method, two phase-shifted interference patterns are generated, without requiring a phase-shifting device, by entering a circularly polarized reference beam into a polarizing beam splitter, and the resulting patterns are captured simultaneously using two image sensors. However, differences in the intensity distributions of the two image sensors may lead to serious measurement errors. Thus, we also develop a two-channel algorithm optimized for the 2ch-HDI to compensate for these differences. Simulation results show that this algorithm can compensate for such differences in the intensity distributions in the two image sensors. Experimental results confirm that the combination of the 2ch-HDI and the calculation algorithm significantly enhances measurement accuracy. (c) 2015 Optical Society of America
  • Masanori Takabayashi, Atsushi Okamoto, Taisuke Eto, Takashi Okamoto
    APPLIED OPTICS 54 16 5167 - 5174 2015年06月 [査読有り][通常論文]
     
    Two methods are proposed to improve the readout quality of signals in self-referential holographic data storage (SR-HDS), in which no reference beam is required to record and read digital data holographically: the off-the-focus (OtF) method and the oversampling additional pattern (OsAP) method. The focal point is located outside of the recording medium in the OtF method, and the signal pattern is recorded with an additional pattern that possesses a higher spatial frequency than the signal pattern in the OsAP method. Experimental results show that both methods are effective for drastically improving the signal-to-noise ratio (SNR). In addition, through numerical simulation, it can be observed that the readout quality is improved by the achievement of homogeneous hologram distribution. (C) 2015 Optical Society of America
  • NISHIMAKI Kaori, OKAMOTO Atsushi, SHIBUKAWA Atsushi, TAKABAYASHI Masanori, TOMITA Akihisa, TAKAYAMA Yoshihisa
    Opt Rev 21 3 415 - 424 2014年06月 [査読有り][通常論文]
  • Atsushi Shibukawa, Atsushi Okamoto, Yuta Goto, Satoshi Honma, Akihisa Tomita
    OPTICS EXPRESS 22 10 11918 - 11929 2014年05月 [査読有り][通常論文]
     
    In a conventional digital phase conjugation system, only the phase of an input light is time-reversed. This deteriorates phase conjugation fidelity and restricts application fields to specific cases only when the input light has uniformly-distributed scattered wavefront. To overcome these difficulties, we present a digital phase conjugate mirror based on parallel alignment of two phase-only spatial light modulators (SLMs), in which both amplitude and phase of the input light can be time-reversed. Experimental result showed that, in the phase conjugation through a holographic diffuser with diffusion angle of 0.5 degree, background noises decrease to 65% by our digital phase conjugation mirror. (C)2014 Optical Society of America
  • Atsushi Shibukawa, Atsushi Okamoto, Masanori Takabayashi, Akihisa Tomita
    OPTICS EXPRESS 22 4 3968 - 3982 2014年02月 [査読有り][通常論文]
     
    We propose a spatial cross modulation method using a random diffuser and a phase-only spatial light modulator (SLM), by which arbitrary complex-amplitude fields can be generated with higher spatial resolution and diffraction efficiency than off-axis and double-phase computer-generated holograms. Our method encodes the original complex object as a phase-only diffusion image by scattering the complex object using a random diffuser. In addition, all incoming light to the SLM is consumed for a single diffraction order, making a diffraction efficiency of more than 90% possible. This method can be applied for holographic data storage, three-dimensional displays, and other such applications. (C) 2014 Optical Society of America
  • Keisuke Zukeran, Atsushi Okamoto, Masanori Takabayashi, Atsushi Shibukawa, Kunihiro Sato, Akihisa Tomita
    JAPANESE JOURNAL OF APPLIED PHYSICS 52 9 09LD13.1-09LD13.9  2013年09月 [査読有り][通常論文]
     
    We proposed a double-referential holography (DRH) that allows phase-detection without external additional beams. In the DRH, phantom beams, prepared in the same optical path as signal beams and preliminary multiplexed in a recording medium along with the signal, are used to produce interference fringes on an imager for converting a phase into an intensity distribution. The DRH enables stable and high-accuracy phase detection independent of the fluctuations and vibrations of the optical system owing to medium shift and temperature variation. Besides, the collinear arrangement of the signal and phantom beams leads to the compactness of the optical data storage system. We conducted an experiment using binary phase modulation signals for verifying the DRH operation. In addition, 38-level spatial quadrature amplitude modulation signals were successfully reproduced with the DRH by numerical simulation. Furthermore, we verified that the distributed phase-shifting method moderates the dynamic range consumption for the exposure of phantom beams. (c) 2013 The Japan Society of Applied Physics
  • Masatoshi Bunsen, Shuhei Umetsu, Masanori Takabayashi, Atsushi Okamoto
    JAPANESE JOURNAL OF APPLIED PHYSICS 52 9 09LD04.1-09LD04.5  2013年09月 [査読有り][通常論文]
     
    A technique for the phase and amplitude detection of object beams with multivalued phase and amplitude modulation is proposed for holographic storage systems. Generally, the spatial distribution of the complex amplitude of the object beam can be precisely detected by phase-shifting interferometric measurements in which the phase of the reference wave for interferometry is temporally or spatially changed in the datapage retrieval process. On the other hand, our technique allows fast, accurate, and feasible phase and amplitude demodulations by preliminary embedding phase shift into the phase signal of the datapage during recording. This technique will significantly improve the data transfer rate and vibration tolerance of the holographic storage system because the complex amplitudes of the object beam carrying datapages can be detected by single-shot image capturing. The optical system for datapage replay will also be simplified because there is no need to use any phase-shifting device during data retrieval. The single-shot detection of the phase-modulated datapage is experimentally demonstrated. (c) 2013 The Japan Society of Applied Physics
  • Atsushi Shibukawa, Atsushi Okamoto, Yuta Wakayama, Akihisa Tomita, Hisatoshi Funakoshi, Kunihiro Sato
    JAPANESE JOURNAL OF APPLIED PHYSICS 52 9 09LD03.1-09LD03.9  2013年09月 [査読有り][通常論文]
     
    To suppress interpage crosstalk that strongly restricts holographic data storage capacity, a digital image diffusion technique was proposed. In this technique, signal and crosstalk components are separated from the propagation angle difference produced by using a random diffuser and the nature of phase conjugate lights. The most attractive feature of the technique is that crosstalk suppression can be conducted while mostly keeping the conventional holographic data storage system unchanged by integrating optical processing and digital processing effectively. The connection between the two types of processing is realized by using two spatial light modulators for complex amplitude generation and phase detection methods for complex amplitude measurement. The simulation results showed that the proposed technique could increase the recording density 5.5-fold and reduce the shift pitch by a factor of 5 in comparison with conventional multiplexing methods when the diffusion angle of the diffuser is 10 degrees. (c) 2013 The Japan Society of Applied Physics
  • Fumiaki Matsuoka, Akihisa Tomita, Atsushi Okamoto
    Physical Review A - Atomic, Molecular, and Optical Physics 88 2 022313.1-022313.7  2013年08月12日 [査読有り][通常論文]
     
    In order to improve the error probability of generating entanglement by communication for quantum computation, we propose the use of squeezed light. When generating entanglement between two atoms by communication, the error probability can be reduced by increasing the distance between quantum states of probe light in phase space. The phase rotation of light depends on the atom-photon coupling strength and the light amplitude, which are limited in practice. A large error probability has been expected for coherent probe light. If we assume typical values of light amplitude and phase rotation, α=100 and θ=0.01, the error probability is estimated to be Pcoh(min)=0.14 and Pcoh(hom)=0.23 for minimum error discrimination and homodyne measurements. The error probability can be reduced to Psqu(min)=1.73×10-8 and Psqu(hom)=4.09×10-5 using squeezed coherent light, where the same values of the mean photon number and the phase rotation angle are assumed for the coherent light probe. These values satisfy the requirements for scalable quantum computation. © 2013 American Physical Society.
  • Yuta Wakayama, Atsushi Okamoto, Kento Kawabata, Akihisa Tomita, Kunihiro Sato
    OPTICS EXPRESS 21 10 12920 - 12933 2013年05月 [査読有り][通常論文]
     
    This study proposes a volume holographic demultiplexer (VHDM) for extracting the spatial modes excited in a multimode fiber. A unique feature of the demultiplexer is that it can separate a number of multiplexed modes output from a fiber in different directions by using multi-recorded holograms without beam splitters, which results in a simple configuration as compared with that using phase plates instead of holograms. In this study, an experiment is conducted to demonstrate the basic operations for three LP mode groups to confirm the performance of the proposed VHDM and to estimate the signal-to-crosstalk noise ratio (SNR). As a result, an SNR of greater than 20 dB is obtained. (C) 2013 Optical Society of America
  • Kohei Aoki, Atsushi Okamoto, Yuta Wakayama, Akihisa Tomita, Satoshi Honma
    Optics Letters 38 5 769 - 771 2013年03月01日 [査読有り][通常論文]
     
    We propose a mode multiplexer based on volume holograms to realize a simple and efficient mode-division-multiplexed transmission system that supports a large number of modes. Selective multiexcitation of three spatial modes into a conventional multimode fiber is experimentally demonstrated. This device could potentially multiplex 10 or more modes. Future perspectives of the mode multiplexer for application in mode-division multiplexing are also discussed. © 2013 Optical Society of America.
  • Masanori Takabayashi, Atsushi Okamoto
    OPTICS EXPRESS 21 3 3669 - 3681 2013年02月 [査読有り][通常論文]
     
    Holographic recording methods require the use of a reference beam that is coherent with the signal beam carrying the information to be recorded. In this paper, we propose self-referential holography (SRH) for holographic recording without the use of a reference beam. SRH can realize purely one-beam holographic recording by considering the signal beam itself as the reference beam. The readout process in SRH is based on energy transfer by inter-pixel interference in holographic diffraction, which depends on the spatial phase difference between the recorded phase and the readout phase. The phase-modulated recorded signal is converted into an intensity-modulated beam that can be easily detected using a conventional image sensor. SRH can be used effectively for holographic data storage and phase-to-intensity conversion. (C) 2013 Optical Society of America
  • KAWABATA Kento, OKAMOTO Atsushi, HONMA Satoshi, WAKAYAMA Yuta, SATO Kunihiro, TOMITA Akihisa
    Proc SPIE 8647 86470C.1-86470C.7  2013年 [査読無し][通常論文]
  • Hiroyuki Nihei, Atsushi Okamoto
    OPTICAL AND QUANTUM ELECTRONICS 44 3-5 265 - 271 2012年06月 [査読有り][通常論文]
     
    We have demonstrated that light is confined in a single mode near a very small defect (such as an impurity atom) embedded in photonic crystals by coherent control using a dark line that is a spectrum singularity leading to the complete quenching of emission. In this demonstration, we have clarified the strong confinement and a very short response time, as compared with the widely used tunable PBG method. These features are useful for keeping the memory in a two-state quantum system such as a quantum bit (qubit) and for processing quantum information.
  • AOKI Kohei, OKAMOTO Atsushi, ODA Takuya, WAKAYAMA Yuta, TOMITA Akihisa
    Tech Dig Int Conf Opt photonics Des Fabr 8th 41 - 42 2012年 [査読有り][通常論文]
  • Masanori Takabayashi, Atsushi Okamoto, Akihisa Tomita, Masatoshi Bunsen
    JAPANESE JOURNAL OF APPLIED PHYSICS 50 9 09ME05.1-09ME05.5  2011年09月 [査読有り][通常論文]
     
    For the purpose of increasing the data density of holographic memories, we propose a novel signal modulation method named hybrid modulation method, which is a combination of multi level phase-modulated signals and intensity-modulated signals. As a first step, we show that the data density of holographic data storage is mainly determined by multiplexing numbers and by coding efficiency in input signals. In this study, we focus on increasing coding efficiency using the hybrid modulation method. From the results of recording and reading simulations based on the fast-Fourier transform beam propagation method, the hybrid modulation method achieves approximately 2 times higher data density than the conventional methods of two-level phase-only modulation and two-level intensity-only modulation. (C) 2011 The Japan Society of Applied Physics
  • Atsushi Shibukawa, Atsushi Okamoto, Akihisa Tomita, Masanori Takabayashi, Kunihiro Sato
    JAPANESE JOURNAL OF APPLIED PHYSICS 50 9 09ME10.1-09ME10.5  2011年09月 [査読有り][通常論文]
     
    We proposed a new multilayer collinear holographic memory (MCHM) with a movable random phase mask that can act as an interlayer crosstalk reducer. First, to clarify the feasibility of our proposed device, we showed that it has an extremely sharp shift selectivity along the thickness direction of medium of nearly 5.0 mu m when the numerical aperture of the objective lens is 0.60. Next, we demonstrated that the utilization of the movable random phase mask can suppress interlayer crosstalk sufficiently, resulting in the improvement in the quality of reconstructed signals. Moreover, we revealed that the MCHM, in which the parallel use of a multilayered technique and collinear shift multiplexing is performed, brings out the medium potential sufficiently in terms of signal to noise ratio and medium dynamic range consumption. Finally, we verified that the MCHM can achieve a nearly 2 times larger data density at least compared with a conventional collinear holographic memory. (C) 2011 The Japan Society of Applied Physics
  • Atsushi Okamoto, Keisuke Kunori, Masanori Takabayashi, Akihisa Tomita, Kunihiro Sato
    OPTICS EXPRESS 19 14 13436 - 13444 2011年07月 [査読有り][通常論文]
     
    This study proposes holographic diversity interferometry (HDI), a system that combines information from spatially dispersed plural image sensors to reconstruct complex amplitude distributions of light signals. HDI can be used to generate four holographic interference fringes having different phases, thus enabling optical phase detection in a single measurement. Unlike conventional phase-shifting digital holography, this system does not require piezoelectric elements and phase shift arrays. In order to confirm the effectiveness of HDI, we generated optical signals having multilevel phases and amplitudes by using two SLMs and performed an experiment for detection and demodulation with HDI. (C) 2011 Optical Society of America
  • WAKAYAMA Yuta, OKAMOTO Atsushi, GRABAR Alexander A
    Ferroelectrics 415 207 - 214 2011年06月 [査読有り][通常論文]
  • Kaori Nishimaki, Atsushi Okamoto, Tomohiro Fujita, Alexander A. Grabar, Masanori Takabayashi, Jun Uozumi, Akihisa Tomita, Yoshihisa Takayama
    FREE-SPACE LASER COMMUNICATION TECHNOLOGIES XXIII 7923 79230N  2011年 [査読無し][通常論文]
     
    Since the optical inter-satellite communication has attractive advantages such as high-speed transmission with high confidence, almost no electronic magnetic interference, and low power consumption, it has been activity investigated. However, directivity control of the laser beams requires a bulky and complicated system in satellite mobile communications. A more flexible and high accurate system with small and simple mechanism has been desired. In this study, we propose a new method of optical inter-satellite communication with a dynamically reconfigurable optical directional device in which diffraction gratings are automatically rewritten and reorganized in response of incident conditions by moving satellites. For realizing such a device, we have developed Sn2P2S6 crystals which have a high sensitive photorefractivity and dynamic reconfigurable property. Furthermore, this crystal has hundreds times faster response than conventional photorefractive materials such as BaTiO3. These features are extremely advantageous to construct a high-speed and flexible communication system with a large tolerance to displacement of moving satellites. To investigate the possibility of the dynamically reconfigurable optical inter-satellite communication system, we experimentally evaluate the temporal and spatial characteristics of Sn2P2S6 crystals for the variation of the beam incident angle. Moreover, the diffraction beam from the crystal has phase conjugate wavefronts of the beam entering from the counter direction. We try to utilize this behavior to suppress the beam spread and to reduce the background light such as sunlight with a spatial filtering technique that has sensitivity in wavefront differences of the signal and background light. (241words)
  • Takuya Oda, Atsushi Okamoto, Daiki Soma, Akihisa Tomita, Yuta Wakayama
    BROADBAND ACCESS COMMUNICATION TECHNOLOGIES V 7958 79580J  2011年 [査読無し][通常論文]
     
    We propose an all-optical demultiplexer based on dynamic multiple holograms using a photorefractive material for mode division multiplexing and optical MIMO processing systems. This demultiplexer can separate a specific spatial mode from multiplexed modes in a multi-mode fiber. In this study, we clarify a mode separation performance with various combinations of LP modes, and show the signal-to-noise ratio (SNR) can be improved by choosing appropriate mode combinations. In addition, to reveal the dependence of mode separation of the intensity ratio of the recording lights, we study the fluctuation of the SNR for LP0,1 mode by the combinations of multiplexed modes. Moreover, two additional recording techniques with a spatial light modulator (SLM) and phase conjugator are also proposed to improve the performance of the mode separation.
  • Yuta Wakayama, Atsushi Okamoto, Akihisa Tomita, Kunihiro Sato
    BROADBAND ACCESS COMMUNICATION TECHNOLOGIES V 7958 79580H  2011年 [査読無し][通常論文]
     
    We propose a reconfigurable optical add-drop multiplexer with ultra-broadband tuning range over 770 nm using a photorefractive polymer. This add-drop multiplexer can optically switch the assignment of the waveband used for communications by only changing the incident angles of two beams writing a hologram. In this work, we clarified the condition in which the channel tuning can be carried out without the location change in the port array. We simulated on the add-drop operation, and showed the ultra-wide tuning range from 780 to 1550 nm. Moreover, we suggested an apodization method for the grating distribution by controlling the intensity ratio of the writing beams to enhance the diffraction efficiency in add-drop operation. As a result, we showed that the apodization method for the grating distribution can improve the diffraction efficiency.
  • Autonomous and dynamic reconfigurable waveguide for optical interconnection with large shift-tolerance
    Proceedings of SPIE 7944 79440G  2011年 [査読無し][通常論文]
  • ODA Takuya, OKAMOTO Atsushi, SOMA Daiki, TOMITA Akihisa, WAKAYAMA Yuta
    Proc SPIE 7958 79580J.1-79580J.9  2011年 [査読無し][通常論文]
  • NISHIMAKI Kaori, OKAMOTO Atsushi, FUJITA Tomohiro, GRABAR Alexander A, TAKABAYASHI Masanori, UOZUMI Jun, TOMITA Akihisa, TAKAYAMA Yoshihisa
    Proc SPIE 7923 79230N.1-79230N.9  2011年 [査読無し][通常論文]
  • WAKAYAMA Yuta, OKAMOTO Atsushi, TOMITA Akihisa, SATO Kunihiro
    Proc SPIE 7958 79580H.1-79580H.8  2011年 [査読無し][通常論文]
  • 多層化コリニアホログラムによる超高密度記録
    岡本 淳, 渋川敦史
    光学 40 11 591 - 593 2011年 [査読無し][招待有り]
  • Yuta Wakayama, Atsushi Okamoto, Alexander A. Grabar, Kunihiro Sato
    Optical Review 18 1 117 - 123 2011年01月 [査読有り][通常論文]
     
    We propose a fundamental interconnection method using a polarization alignment system for waveguides having different spatial modes. In addition, as an example for the verification of the fundamental operation, we demonstrate an interconnection between a photonic crystal fiber and a laser that have obviously different spatial modes. The polarization alignment system operates synergistically with a self-written waveguide formed with a double phaseconjugate mirror. This technique enables us to interconnect a photonic crystal fiber with a laser source without complicated and time-consuming optical alignment. In this method, although it is not necessary to perform an external control for interconnection, the waveguide most suitable for connection is formed autonomously in a Sn2P2S6:Sb crystal developed for this purpose. There was a marked reduction in the polarization dependence of coupling efficiency, compared with that observed using a stand-alone double phase-conjugate mirror. © 2011 The Optical Society of Japan.
  • Masatoshi Bunsen, Seiji Fukuchi, Shuji Takahashi, Hirosuke Furuta, Atsushi Okamoto
    JAPANESE JOURNAL OF APPLIED PHYSICS 49 8 08KD06.1-08KD06.4  2010年08月 [査読有り][通常論文]
     
    A method for directional control of shift selectivities of speckle-multiplexed holograms with a diffuser whose diffusion angle varies with the diffusion direction is proposed to enhance the tolerance of recorded holograms to repositioning error in holographic storage. The directional dependence and controllability of shift selectivities of holograms are experimentally investigated using various diffusers. By retrieving 50 speckle-multiplexed holograms with deliberate deviations from the original recording position and by measuring bit error rate, it is also confirmed that the tolerance to repositioning error is improved. (C) 2010 The Japan Society of Applied Physics
  • WAKAYAMA Yuta, OKAMOTO Atsushi, GRABAR Alexander A
    Tech Dig Int Conf Opt photonics Des Fabr 7th 233 - 234 2010年 [査読有り][通常論文]
  • OKAMOTO Atsushi, MORITA Kazuyuki, WAKAYAMA Yuta, TANAKA Junya, SATO Kunihiro
    Proc SPIE 7716 771627.1-771627.10  2010年 [査読無し][通常論文]
  • Tanaka Junya, Okamoto Atsushi, Kitano Motoki
    Jpn J Appl Phys 48 3 03A028 - 03A028-5 INSTITUTE OF PURE AND APPLIED PHYSICS 2009年03月 [査読有り][通常論文]
     
    We apply the fast Fourier transform beam-propagation method (FFT-BPM) to analyze holographic data storage systems (HDSSs), and develop an image-based simulation for diffraction characteristics in a transmission-type HDSS. The FFT-BPM is known as a very effective method for the design of large waveguides. By applying this method, we can obtain a beam profile in a recording medium that consists of a three-dimensional (3D) complex refractive-index distribution, and analyze the diffraction characteristics in page-oriented multiplexing holograms for an analytic region more practical than that required for the finite-difference time-domain (FDTD) method because of much lower computation time and memory. In this study, we demonstrate angular multiplexing by recording three data pages at different angles and visualize angular selectivity for diffraction efficiency and the sharpness of reconstructed images by a 3D numerical simulation.
  • Takabayashi Masanori, Okamoto Atsushi, Sato Kunihiro
    Jpn J Appl Phys 48 3 03A032 - 03A032-5 INSTITUTE OF PURE AND APPLIED PHYSICS 2009年03月 [査読有り][通常論文]
     
    Holographic data storage with phase-modulated signals has great advantages over conventional intensity-based memory. These include the efficient use of material dynamic range and light power in a spatial light modulator. On the other hand, phase-based holographic data storage has a disadvantage, which is the difficulty in distinguishing phase-modulated signals. We propose and demonstrate a new phase-modulated signal detection method with photorefractive two-wave mixing. This method has several advantages such as high energy efficiency, detection of multi valued phase-modulated signals, and alignment-free optics. In this study, we investigate the spatial resolution of the phase-modulated signal detection method and obtain a spatial resolution of 300–500 μm of incident pixels.
  • Kitano Motoki, Okamoto Atsushi, Sano Takayuki
    Jpn J Appl Phys 48 3 03A036 - 03A036-6 INSTITUTE OF PURE AND APPLIED PHYSICS 2009年03月 [査読有り][通常論文]
     
    To determine the degree of security in two-wave encryption under practical conditions, we present a novel numerical technique for simulating the recording and readout of two-wave encryption. The calculation results of the retrieval characteristics show that the diffraction efficiency in an incorrect decryption is 10 times as low as that in correct decryption key and that the output data with an incorrect key is a white noise image. We estimate the necessary key correlation to decrypt an encrypted data is 0.2 when the length of an encryption key is 2313. This means that the decoding probability of the encryption key in two-wave encryption is less than $10^{-6}$ even if such a short key is used.
  • Yasunori Kojima, Atsushi Okamoto, Alexander A. Grabar, Masanori Takabayashi, Kohei Shimayabu
    FERROELECTRICS 378 121 - 128 2009年 [査読有り][通常論文]
     
    We present various optical basic properties of a 1.5% doped Sb:Sn2P2S6 crystal experimentally and demonstrate a double phase conjugate mirror (DPCM). We measured the reflection, absorption and scattering of this crystal. The large coupling strength L = 8.2 was obtained by the experiment of two-wave mixing. In addition, we succeeded in the formation of the DPCM and achieved the high diffraction efficiency of 42%. This crystal was suitable for DPCM applications of high speed response.
  • Atsushi Okamoto, Kazuhiro Harasaka, Masatoshi Bunsen, Masanori Takabayashi, Shuji Rokutanda
    JOURNAL OF MODERN OPTICS 56 12 1323 - 1334 2009年 [査読有り][通常論文]
     
    Spatial resolutions of diffracted beams by photorefractive polymers are investigated in detail for applying the polymers to diffractive optical elements. The coupled wave equations for the four-wave mixing in photorefractive polymers and their solutions by applying the two-beam coupling approximation are derived taking the orientational enhancement effect into consideration. Characteristics of the diffraction efficiency of the polymers for the applied electric field, the incident angles of beams, the incident radiation intensity and the polarization are clarified. Furthermore, resolutions of diffracted images with the polymers are discussed by a numerical analysis from the viewpoint of the Bragg diffraction in a spatial frequency domain. An experiment with the TPD (tetra-phenyl-diphenyldiamine) acrylate based photorefractive polymers and the USAF test target is also performed to measure the spatial resolution of two-dimensional images diffracted by the polymer and to verify the calculated results. It is revealed that high resolution over 50 lp mm-1 can be obtained with sufficient diffraction efficiency in the case of the polymer thickness of several 10 mu m.
  • Ito T, Okamoto A, Sato K
    Applied optics 46 23 5902 - 5911 2007年08月 [査読有り][通常論文]
  • Digital image multiplexing/demultiplexing method using spatial spectral diffusion and virtual phase conjugation technique for reduction of dynamic range consumption in holographic medium
    Yuta Goto, Atsushi Okamoto, Masanori Takabayashi, Kazuhisa Ogawa, Akihisa Tomita
    Japanese Journal of Applied Physics 56 98 09NA07-1 - 09NA07-8 2007年08月 [査読有り][通常論文]
  • Ito T, Okamoto A, Funakoshi H, Sato K
    Applied optics 46 13 2443 - 2452 2007年05月 [査読有り][通常論文]
  • Bunsen M, Furuta H, Okamoto A
    Applied optics 45 27 7035 - 7042 2006年09月 [査読有り][通常論文]
  • Bunsen M, Okamoto A
    Applied optics 44 8 1454 - 1463 2005年03月 [査読有り][通常論文]

書籍

  • ホログラム最新技術～感光材料の開発から実製品への応用まで～
    情報機構 2007年
  • ホログラフィックメモリーのシステムと材料
    シーエムシー出版 2006年
  • Systems, Devices and Materials for the Holographic Data Storage
    2006年

講演・口頭発表等

特許

  • 特許4997428:ホログラム記録・消去装置およびホログラム記録・消去方法  
    文仙正俊, 古田洋介, 岡本 淳
  • 光波長フィルタ装置
    特許公開２００９－１４５４２９
  • ホログラム複製装置およびホログラム複製方法
    特許公開２００８－２８７１０７
  • 記録再生装置、記録再生方法、再生装置及び再生方法
    特開2008-97738
  • 記録再生装置、記録再生方法、再生装置及び再生方法
    特許公開２００８－９７７３８
  • 特許4815595:多重ホログラム転写装置および多重ホログラム転写方法  
    伊藤輝将, 岡本 淳
  • ファニング光結合構造およびそのファニング光結合構造を用いた光増幅器
    特開2007-43087
  • 双方向光配線形成方法
    特開2007-41519
  • 特許4876222:画像記録方法  
    岡本 淳, 森竹 潔
  • 特許4765067:ホログラムメモリ装置およびこの装置に適用されるホログラムリフレッシュ方法  
    岡本 淳, 伊藤 輝将
  • 特許4670047:光中継装置および光中継方法  
    岡本 淳, 村中 秀史
  • 特開2005-189844:光インターコネクション装置および光インターコネクション方法  
    岡本 淳, 本藤 聡一郎, 高木 清史
  • 位相共役光発生装置
    特開2005-292792
  • ホログラム処理装置およびホログラム処理方法
    特開2006-208858
  • ホログラム記録装置およびホログラム記録方法
    特開2006-184570
  • 特許4533770:光インターコネクション装置および光インターコネクション方法  
    岡本 淳, 植村 俊介, 高木 清史
  • ホログラムメモリ装置およびホログラム記録方法
    特開2005-189845
  • ホログラムメモリ装置及びホログラムの消去方法
    特開2006-126642
  • ホログラム多重記録装置およびホログラム多重記録方法ならびにホログラム再生方法
    特開2005-134659
  • 特許3811777:光スイッチ装置および光伝搬経路接続切り替え装置  
    高山 佳久, 岡本 淳, 本間 聡  
    特許第3811777
  • 光伝送システムおよび光伝送方法
    特開2004-165966
  • 特許4060134:マトリクススイッチ型インターコネクション装置およびそのインターコネクション方法  
    岡本 淳, 高木 清史
  • 特許4285941:ホログラフィック光メモリ装置およびそのメモリ修復方法  
    岡本 淳, 本間 聡, 甲斐野 俊也, 外石 満, 高木 清史
  • ホトリフラクティブ導波路型インターコネクション装置およびそのインターコネクション方法
    特開2003-255418
  • 特願2013-233492:複素振幅像生成装置および複素振幅像生成方法  
    岡本 淳, 渋川敦史
  • 特願2013-168989:複素振幅画像再生装置および複素振幅画像再生方法、ならびに、散乱位相画像生成装置および散乱位相画像生成方法  
    岡本 淳, 渋川敦史, 後藤優太
  • 特願2012-213102:ノイズ除去方法およびノイズ除去装置,記録再生方法および記録再生装置,ならびに,画像計測方法および画像計測装置  
    岡本 淳, 渋川敦史, 若山雄太
  • 岡本 淳, 高林 正典
  • 岡本 淳, 瑞慶覧 圭佑, 高林 正典, 渋川 敦史
  • 岡本 淳, 九里 佳祐, 高林 正典
  • 岡本 淳, 森田一行

受賞

  • 2012年11月 Outstanding Student Paper Award, IWH2012
     Interpage crosstalk suppression by spatial spectrum diffusion and digital phase conjugate reconstruction 
    受賞者: Atsushi Shibukawa;Atsushi Okamoto;Yuta Wakayama;Akihisa Tomita;Hisatoshi Funakoshi;Kunihiro Sato
  • 2012年10月 ISOM2012 Best Student Paper Award
     38-Level Spatial Quadrature-Amplitude Modulation Recording with Double-Referential Holography 
    受賞者: Keisuke Zukeran;Atsushi Okamoto;Masanori Takabayashi;Atsushi Shibukawa;Akihisa Tomita
  • 2006年 ISOM Excessent Student Award
  • 2005年 Best Paper Award
  • 2005年 Best Paper Award
  • 2001年 General Research Award
     
    受賞者: 岡本 淳

共同研究・競争的資金等の研究課題

  • 光複素振幅制御技術を用いたモード拡散多重光ファイバ通信に関する研究
    科学研究費補助金
    研究期間 : 2013年 
    代表者 : 岡本 淳
  • 光ファイバMIMO通信技術創出に向けての多重空間モード分離・結合デバイスの研究
    科学研究費補助金：
    研究期間 : 2009年 -2011年 
    代表者 : 岡本 淳
  • 光集積回路・導波路チップ間のリコンフュギュラブルな自動配線技術
    テレコム先端技術研究支援センター：平成20年度SCAT研究助成(研究費助成)
    研究期間 : 2008年 -2010年 
    代表者 : 岡本 淳
  • ダイナミック・リコンフィギュラブルな光素子の創出
    三菱財団：[e11] 第39回三菱財団研究助成 自然科学研究助成
    研究期間 : 2008年 -2009年 
    代表者 : 岡本 淳
  • しきい値秘密分散機能を有する全光学的な暗号・認証技術に関する研究
    科学研究費補助金
    研究期間 : 2008年 -2009年 
    代表者 : 岡本 淳

教育活動情報

主要な担当授業

  • 光エレクトロニクス特論
    開講年度 : 2021年
    課程区分 : 修士課程
    開講学部 : 情報科学院
    キーワード : 半導体レーザ、光検出、光通信、量子通信、非線形光学、高調波発生、パラメリック発振、光誘起屈折率効果
  • 光デバイス学特論
    開講年度 : 2021年
    課程区分 : 修士課程
    開講学部 : 情報科学研究科
    キーワード : 半導体レーザ、光検出、光通信、量子通信、非線形光学、高調波発生、パラメリック発振、光誘起屈折率効果
  • 光エレクトロニクス特論
    開講年度 : 2021年
    課程区分 : 博士後期課程
    開講学部 : 情報科学院
    キーワード : 半導体レーザ、光検出、光通信、量子通信、非線形光学、高調波発生、パラメリック発振、光誘起屈折率効果
  • 光デバイス学特論
    開講年度 : 2021年
    課程区分 : 博士後期課程
    開講学部 : 情報科学研究科
    キーワード : 半導体レーザ、光検出、光通信、量子通信、非線形光学、高調波発生、パラメリック発振、光誘起屈折率効果
  • 電気電子工学実験Ⅰ
    開講年度 : 2021年
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : バイポーラトランジスタ，増幅回路，MOSFET，CMOS，演算増幅器，論理回路，順序回路，ディジタル回路
  • 電気電子工学実験Ⅱ
    開講年度 : 2021年
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : 偏光，旋光，回折，屈折，結晶構造，X線回折，半導体物性，ホール効果，電気磁気エネルギー，電力
  • 電気電子工学実験Ⅲ
    開講年度 : 2021年
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : 半導体プロセス，MOSFET，集積回路特性評価，SPICE，回路シミュレーション，アセンブリ言語
  • 一般教育演習(ﾌﾚｯｼｭﾏﾝｾﾐﾅｰ)
    開講年度 : 2021年
    課程区分 : 学士課程
    開講学部 : 全学教育
    キーワード : 光、レーザ、LED、光通信、光ファイバ、光ディスクメモリ、デジタルカメラ、ホログラム、3次元ディスプレイ、光計測・イメージング
  • 応用光工学
    開講年度 : 2021年
    課程区分 : 学士課程
    開講学部 : 工学部
    キーワード : レーザー、発光ダイオード、光増幅器、光検出器、光変調器、光システムの雑音、撮像と表示、光通信システム、光情報処理

大学運営

委員歴

  • 2008年 - 2009年   電子情報通信学会   北海道支部 学生会顧問   電子情報通信学会
  • 2009年   電子情報通信学会   本部評議員   電子情報通信学会
  • 2008年   電子情報通信学会   支部評議員   電子情報通信学会
  • 2005年 - 2006年   日本光学会   幹事   日本光学会

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