原山 卓久

研究成果

年別の研究成果 1992 2006 2007 2008 2018

• 81 Article
• 52 Conference contribution
• 5 Conference article
• 1 Chapter
• 3 その他
  • 1 Editorial
  • 1 Letter
  • 1 Review article

年別の研究成果

年別の研究成果

検索結果

• 2018

  Chaotic laser based online physical random bit streaming system and its application to high-throughput encryption

  Arai, K., Shinohara, S., Davis, P., Sunada, S. & Harayama, T., 2018 6月 13, 2018 Optical Fiber Communications Conference and Exposition, OFC 2018 - Proceedings. Institute of Electrical and Electronics Engineers Inc., p. 1-3 3 p.

  研究成果

  • Cryptography 100%
  • Entropy 99%
  • Lasers 91%
  • application programming interface 91%
  • Throughput 84%

• Chaotic laser based online physical random bit streaming system and its application to high-throughput encryption

  Arai, K., Shinohara, S., Davis, P., Sunada, S. & Harayama, T., 2018, Optical Fiber Communication Conference, OFC 2018. OSA - The Optical Society, TU3G.3. (Optics InfoBase Conference Papers; vol. Part F84-OFC 2018).

  研究成果

  • Cryptography 100%
  • Entropy 99%
  • Lasers 91%
  • Throughput 84%
  • Application programming interfaces (API) 57%
• 2015

  Transverse magnetic emissions of GaAs unstrained quantum-well microcavity lasers

  Fukushima, T., Shinohara, S., Sunada, S., Harayama, T., Sakaguchi, K. & Tokuda, Y., 2015 8月 12, ICTON 2015 - 17th International Conference on Transparent Optical Networks. Jaworski, M. & Marciniak, M. (eds.). IEEE Computer Society, 7193549. (International Conference on Transparent Optical Networks; vol. 2015-August).

  研究成果

  • Microcavities 100%
  • Semiconductor quantum wells 96%
  • Polarization 56%
  • Orbits 54%
  • Semiconductor lasers 51%
• 2014

  Compact two-dimensional multipass gaas optical cavity with a long path length

  Fukushima, T., Shinohara, S., Sunada, S., Harayama, T., Arai, K., Yoshimura, K., Sakaguchi, K. & Tokuda, Y., 2014 10月 14, Optics InfoBase Conference Papers. Optical Society of America (OSA), (Optics InfoBase Conference Papers).

  研究成果

  • Trajectories 100%
  • Length 85%
• 2013

  Physical random number generation using photonic integrated circuit with mutually-coupled semiconductor lasers

  Takahashi, R., Akizawa, Y., Uchida, A., Harayama, T., Tsuzuki, K., Sunada, S., Yoshimura, K., Arai, K. & Davis, P., 2013, Frontiers in Optics, FIO 2013. Optical Society of America (OSA), (Optics InfoBase Conference Papers).

  研究成果

  • Random number generation 100%
  • statistical tests 89%
  • random numbers 86%
  • Semiconductor lasers 81%
  • Statistical tests 76%

• Ray dynamical simulation of penrose unilluminable room cavity

  Fukushima, T., Shinohara, S., Sunada, S., Harayama, T., Sakaguchi, K. & Tokuda, Y., 2013 1月 1, Laser Science, LS 2013. Optical Society of America, (Optics InfoBase Conference Papers).

  研究成果

  • Resonators 100%
  • rooms 99%
  • rays 92%
  • cavities 65%
  • simulation 40%
  2 被引用数 (Scopus)

• Ray dynamical simulation of penrose unilluminable room cavity

  Fukushima, T., Shinohara, S., Sunada, S., Harayama, T., Sakaguchi, K. & Tokuda, Y., 2013, Frontiers in Optics, FIO 2013. Optical Society of America (OSA), (Optics InfoBase Conference Papers).

  研究成果

  • Resonators 100%
  • rooms 99%
  • rays 92%
  • cavities 65%
  • simulation 40%
• 2011

  Fast physical random number generation with bandwidth enhancement of chaotic semiconductor lasers

  Yamazaki, T., Akizawa, Y., Uchida, A., Harayama, T., Sunada, S., Yoshimura, K. & Davis, P., 2011 12月 1, Frontiers in Optics, FiO 2011. (Optics InfoBase Conference Papers).

  研究成果

  • Random number generation 100%
  • random numbers 86%
  • Semiconductor lasers 81%
  • semiconductor lasers 50%
  • bandwidth 46%

• Selective excitation of lowest-order axial and ring modes in confocal quasi-stadium laser diodes

  Fukushima, T., Sunada, S., Harayama, T., Sakaguchi, K. & Tokuda, Y., 2011 11月 7, 2011 13th International Conference on Transparent Optical Networks, ICTON 2011. 5971049. (International Conference on Transparent Optical Networks).

  研究成果

  • Stadiums 100%
  • Field emission 96%
  • Semiconductor lasers 93%
  • Electrodes 57%
  • Calculation Method 40%
• 2009

  Efficient physical random bit generation with lasers

  Harayama, T., Uchida, A., Yoshimura, K. & Davis, P., 2009 11月 18, ICTON 2009: 11th International Conference on Transparent Optical Networks. 5185129. (ICTON 2009: 11th International Conference on Transparent Optical Networks).

  研究成果

  • Semiconductor 100%
  • Lasers 99%
  • Broadband amplifiers 29%
  • Semiconductor lasers 27%
  • Statistical tests 25%
• 2008

  Convergence of far-field characteristics upon ray dynamics in stadium microlasers

  Choi, M., Shinohara, S., Fukushima, T. & Harayama, T., 2008, Frontiers in Optics, FiO 2008. Optical Society of America (OSA), (Optics InfoBase Conference Papers).

  研究成果

  • Stadiums 100%
  • Field emission 96%
  • lasing 67%
  • far fields 67%
  • Semiconductor materials 66%

• Earth's rotation rate detection using an extremely-large semiconductor fiber optic gyroscope extending over 10,000 m²

  Inagaki, K., Tamura, S., Tanaka, T., Noto, H. & Harayama, T., 2008, 19th International Conference on Optical Fibre Sensors. 70045F. (Proceedings of SPIE - The International Society for Optical Engineering; vol. 7004).

  研究成果

  • Fiber Optics 100%
  • Earth rotation 96%
  • Gyroscope 92%
  • Semiconductors 75%
  • gyroscopes 70%
  3 被引用数 (Scopus)

• Improvement of accuracy of angular velocity detection in semiconductor fiber-optic ring laser gyroscope

  Ishida, T., Tamura, S., Simada, S., Inagaki, K., Saito, S. & Harayama, T., 2008, 19th International Conference on Optical Fibre Sensors. 700450. (Proceedings of SPIE - The International Society for Optical Engineering; vol. 7004).

  研究成果

  • Fiber Optics 100%
  • laser gyroscopes 98%
  • Ring lasers 96%
  • Gyroscope 92%
  • Laser 80%
  5 被引用数 (Scopus)

• Lasing emission patterns from monza-shaped semiconductor microcavities

  Nakae, Y., Miyasaka, T., Sasaki, T., Shinohara, S. & Harayama, T., 2008 9月 26, Proceedings of 2008 10th Anniversary International Conference on Transparent Optical Networks, ICTON. p. 258-259 2 p. 4598784. (Proceedings of 2008 10th Anniversary International Conference on Transparent Optical Networks, ICTON; vol. 4).

  研究成果

  • Microcavities 100%
  • Field emission 79%
  • Semiconductor materials 54%
  • Lasers 46%
  • Trajectories 43%
  2 被引用数 (Scopus)

• Nonlinear dynamics in deformed microcavity lasers

  Harayama, T., 2008, Frontiers in Optics, FiO 2008. Optical Society of America (OSA), (Optics InfoBase Conference Papers).

  研究成果

  • Microcavities 100%
  • optical switching 68%
  • lasing 56%
  • Demonstrations 50%
  • Lasers 46%

• Nonlinear dynamics in deformed microcavity lasers

  Harayama, T., 2008 1月 1, Frontiers in Optics, FiO 2008. Optical Society of America, (Optics InfoBase Conference Papers).

  研究成果

  • Microcavities 100%
  • optical switching 68%
  • lasing 56%
  • Demonstrations 50%
  • Lasers 46%

• Sagnac effect and frequency splitting in rotating optical microcavities

  Harayama, T. & Sunada, S., 2008, Proceedings of 2008 10th Anniversary International Conference on Transparent Optical Networks, ICTON. p. 38 1 p. 4598724. (Proceedings of 2008 10th Anniversary International Conference on Transparent Optical Networks, ICTON; vol. 4).

  研究成果

  • Microcavities 100%
  • Angular velocity 22%
  • Eigenvalues and eigenfunctions 21%
• 2007

  Alternate oscillations with n phase difference in quasi-stadium laser diodes

  Choi, M., Fukushima, T. & Harayama, T., 2007 1月 1, Conference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2007. Optical Society of America, (Optics InfoBase Conference Papers).

  研究成果

  • Stadiums 100%
  • Semiconductor lasers 93%
  • semiconductor lasers 57%
  • oscillations 47%
  • Semiconductor quantum wells 39%

• Alternate oscillations with π phase difference in Quasi-Stadium Laser Diodes

  Choi, M., Fukushima, T. & Harayama, T., 2007 12月 1, 2007 Conference on Lasers and Electro-Optics - Pacific Rim, CLEO/PACIFIC RIM. 4391660. (Pacific Rim Conference on Lasers and Electro-Optics, CLEO - Technical Digest).

  研究成果

  • Stadiums 100%
  • Semiconductor lasers 93%
  • semiconductor lasers 57%
  • oscillations 47%
  • Semiconductor quantum wells 39%
  1 被引用数 (Scopus)

• Axis and ring mode switching in multi-electrode GaAs quasi-stadium laser diodes

  Fukushima, T. & Harayama, T., 2007 12月 1, Conference on Lasers and Electro-Optics, 2007, CLEO 2007. 4453606. (Conference on Lasers and Electro-Optics, 2007, CLEO 2007).

  研究成果

  • Stadiums 100%
  • Semiconductor lasers 93%
  • Electrodes 57%
  • Behavior as Electrode 37%
  2 被引用数 (Scopus)

• Axis and ring mode switching in multi-electrode GaAs quasi-stadium laser diodes

  Fukushima, T. & Harayama, T., 2007 12月 1, 2007 Quantum Electronics and Laser Science Conference, QELS. 4431383. (Conference on Quantum Electronics and Laser Science (QELS) - Technical Digest Series).

  研究成果

  • semiconductor lasers 100%
  • gradient index optics 92%
  • rings 89%
  • electrodes 80%
  • aluminum gallium arsenides 61%

• Axis and ring mode switching in multi-electrode GaAs quasi-stadium laser diodes

  Fukushima, T. & Harayama, T., 2007 1月 1, Conference on Lasers and Electro-Optics, CLEO 2007. Optical Society of America, (Optics InfoBase Conference Papers).

  研究成果

  • Stadiums 100%
  • Semiconductor lasers 93%
  • semiconductor lasers 57%
  • Electrodes 57%
  • gradient index optics 53%

• Axis and ring mode switching in multi-electrode GaAs quasi-stadium laser diodes

  Fukushima, T. & Harayama, T., 2007 1月 1, Quantum Electronics and Laser Science Conference, QELS 2007. Optical Society of America, (Optics InfoBase Conference Papers).

  研究成果

  • Stadiums 100%
  • Semiconductor lasers 93%
  • semiconductor lasers 57%
  • Electrodes 57%
  • gradient index optics 53%

• Axis and ring mode switching in multi-electrode GaAs quasi-stadium laser diodes

  Fukushima, T. & Harayama, T., 2007 1月 1, Photonic Applications Systems Technologies Conference, PhAST 2007. Optical Society of America, (Optics InfoBase Conference Papers).

  研究成果

  • Stadiums 100%
  • Semiconductor lasers 93%
  • semiconductor lasers 57%
  • Electrodes 57%
  • gradient index optics 53%

• Beam mode observation in quasi-stadium laser diodes

  Nakae, Y., Takehana, H., Sasaki, T., Fukushima, T. & Harayama, T., 2007 12月 1, Proceedings of 2007 9th International Conference on Transparent Optical Networks, ICTON 2007. p. 162-165 4 p. 4296367. (Proceedings of 2007 9th International Conference on Transparent Optical Networks, ICTON 2007; vol. 4).

  研究成果

  • Carrier concentration 100%
  • Stadiums 93%
  • Semiconductor lasers 87%
  • Etching 75%
  • Ions 64%

• Experimental investigation of Sagnac beat signals using semiconductor fiber-optic ring laser gyroscope (S-FOG) based on semiconductor optical amplifier (SOA)

  Tamura, S., Inagaki, K., Noto, H. & Harayama, T., 2007, Fiber Optic Sensors and Applications V. 677014. (Proceedings of SPIE - The International Society for Optical Engineering; vol. 6770).

  研究成果

  • Fiber Optics 100%
  • laser gyroscopes 98%
  • Ring lasers 96%
  • Semiconductor optical amplifiers 95%
  • Gyroscope 92%
  8 被引用数 (Scopus)

• Generalized sagnac effect in rotating optical cavities

  Sunada, S., Harayama, T. & Miyasaka, T., 2007 12月 1, Proceedings of 2007 9th International Conference on Transparent Optical Networks, ICTON 2007. p. 158-161 4 p. 4296366. (Proceedings of 2007 9th International Conference on Transparent Optical Networks, ICTON 2007; vol. 4).

  研究成果

  • Natural frequencies 100%

• Optical control of ring modes using tandem quasi-stadium laser diodes

  Sasaki, T. K., Nakae, Y., Choi, M., Fukushima, T. & Harayama, T., 2007 12月 1, Proceedings of 2007 9th International Conference on Transparent Optical Networks, ICTON 2007. p. 151-154 4 p. 4296364. (Proceedings of 2007 9th International Conference on Transparent Optical Networks, ICTON 2007; vol. 4).

  研究成果

  • Stadiums 100%
  • Semiconductor lasers 93%
  • slave 91%
  • Laser resonators 65%
  • Semiconductor quantum wells 58%

• Ray-wave correspondence in stadium-shaped optical cavities

  Shinohara, S. & Harayama, T., 2007 12月 1, Proceedings of 2007 9th International Conference on Transparent Optical Networks, ICTON 2007. p. 188-189 2 p. 4296374. (Proceedings of 2007 9th International Conference on Transparent Optical Networks, ICTON 2007; vol. 4).

  研究成果

  • Stadiums 100%
  • Light emission 58%

• Rotating optical microcavities

  Harayama, T. & Sunada, S., 2007 12月 1, 2007 Conference on Lasers and Electro-Optics - Pacific Rim, CLEO/PACIFIC RIM. 4391546. (Pacific Rim Conference on Lasers and Electro-Optics, CLEO - Technical Digest).

  研究成果

  • Microcavities 100%
  • Standing Wave 94%
  • Wave 57%
  • Velocity 52%
  • Sagnac effect 47%

• Rotating optical microcavities

  Harayama, T. & Sunada, S., 2007 1月 1, Conference on Lasers and Electro-Optics/Pacific Rim, CLEOPR 2007. Optical Society of America, (Optics InfoBase Conference Papers).

  研究成果

  • Microcavities 100%
  • Sagnac effect 47%
  • thresholds 28%
  • Angular velocity 22%
  • Eigenvalues and eigenfunctions 21%

• Theory and applications of 2D microcavity lasers

  Harayama, T. & Fukushima, T., 2007 12月 1, Proceedings of 2007 9th International Conference on Transparent Optical Networks, ICTON 2007. p. 42-45 4 p. 4296240. (Proceedings of 2007 9th International Conference on Transparent Optical Networks, ICTON 2007; vol. 3).

  研究成果

  • Microcavities 100%
  • Semiconductor diodes 51%
  • Lasers 46%
  • Reactive ion etching 41%
  • Stadiums 41%

• Two mode interactions in quasi-stadium laser diodes

  Choi, M., Fukushima, T. & Harayama, T., 2007 12月 1, Proceedings of 2007 9th International Conference on Transparent Optical Networks, ICTON 2007. p. 166-169 4 p. 4296368. (Proceedings of 2007 9th International Conference on Transparent Optical Networks, ICTON 2007; vol. 4).

  研究成果

  • Stadiums 100%
  • Semiconductor lasers 93%
  • interaction 35%
  • Semiconductor quantum wells 29%
  • Ring lasers 28%
• 2006

  Control of directional emission in two-dimensional quasi-stadium micro-cavity laser diodes with two-electrodes

  Choi, M., Tanaka, T., Fukushima, T. & Harayama, T., 2006, 2006 International Conference on Transparent Optical Networks, ICTON 2006. p. 117-119 3 p. 4013906. (2006 International Conference on Transparent Optical Networks; vol. 4).

  研究成果

  • Stadiums 100%
  • Semiconductor lasers 93%
  • semiconductor lasers 57%
  • Electrodes 57%
  • electrodes 46%

• Directional emission patterns from the oval-billiard microcavity laser diodes

  Tanaka, T., Hentschel, M., Fukushima, T. & Harayama, T., 2006, 2006 International Conference on Transparent Optical Networks, ICTON 2006. p. 121-123 3 p. 4013907. (2006 International Conference on Transparent Optical Networks; vol. 4).

  研究成果

  • Microcavities 100%
  • Semiconductor lasers 76%
  • Resonators 58%
  • Semiconductor quantum wells 48%
  • semiconductor lasers 47%

• Highly directional emission in stadium-cavity lasers

  Shinohara, S., Harayama, T., Türeci, H. E. & Stone, D. A., 2006 12月 1, 2006 International Conference on Transparent Optical Networks, ICTON 2006. 1 p. 4013879. (2006 International Conference on Transparent Optical Networks; vol. 4).

  研究成果

  • Laser resonators 100%
  • Stadiums 76%
  • laser cavities 60%
  • Phase Space 54%
  • rays 49%

• Locking of two modes and unidirectional beam emission in quasi-stadium laser diodes

  Sasaki, T., Fukushima, T., Tanaka, T. & Harayama, T., 2006, 2006 International Conference on Transparent Optical Networks, ICTON 2006. p. 134-136 3 p. 4013878. (2006 International Conference on Transparent Optical Networks; vol. 4).

  研究成果

  • Semiconductor quantum wells 100%
  • Stadiums 85%
  • Semiconductor lasers 79%
  • locking 60%
  • quantum wells 49%

• Lowest order ring mode lasing in confocal quasi-stadium laser diodes

  Fukushima, T. & Harayama, T., 2006 1月 1, 19th Annual Meeting of the IEEE Lasers and Electro-Optics Society, LEOS. Institute of Electrical and Electronics Engineers Inc., p. 931-932 2 p. 4054494. (Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS).

  研究成果

  • Stadiums 100%
  • Semiconductor lasers 93%
  • Electrodes 57%
  • Shape 49%
  • Behavior as Electrode 37%
  6 被引用数 (Scopus)

• Mode switching by optical injection in tandem quasi-stadium laser diodes

  Fukushima, T. & Harayama, T., 2006 12月 1, Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference, CLEO/QELS 2006. 4628757. (Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference, CLEO/QELS 2006).

  研究成果

  • Stadiums 100%
  • Semiconductor lasers 93%
  • Laser resonators 65%
  • semiconductor lasers 57%
  • injection 54%

• Mode switching by optical injection in tandem quasi- stadium laser diodes

  Fukushima, T. & Harayama, T., 2006 1月 1, Quantum Electronics and Laser Science Conference, QELS 2006. Optical Society of America, (Optics InfoBase Conference Papers).

  研究成果

  • Stadiums 100%
  • Semiconductor lasers 93%
  • Laser resonators 65%
  • semiconductor lasers 57%
  • injection 54%

• Morphological dependence of emission patterns from oval-billiard microcavity laser diodes

  Tanaka, T., Hentschel, M., Fukushima, T. & Harayama, T., 2006, 19th Annual Meeting of the IEEE Lasers and Electro-Optics Society, LEOS. Institute of Electrical and Electronics Engineers Inc., p. 729-730 2 p. 4054391. (Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS).

  研究成果

  • Microcavities 100%
  • Semiconductor lasers 76%
  • Semiconductor quantum wells 48%
  • Experiments 11%

• Nonlinear Sagnac effect for ring laser gyroscopes

  Harayama, T., Sunada, S., Tamura, S., Inagaki, K. & Noto, H., 2006, Optical Fiber Sensors, OFS 2006. Optical Society of America (OSA), (Optics InfoBase Conference Papers).

  研究成果

  • laser gyroscopes 100%
  • Sagnac effect 98%
  • Ring lasers 97%
  • ring lasers 71%
  • Gyroscopes 69%
  1 被引用数 (Scopus)

• Ring and axis mode switching in quasi-stadium laser diodes with multi-electrodes

  Nakae, Y., Fukushima, T., Tanaka, T. & Harayama, T., 2006, 2006 International Conference on Transparent Optical Networks, ICTON 2006. p. 132-133 2 p. 4013877. (2006 International Conference on Transparent Optical Networks; vol. 4).

  研究成果

  • Stadiums 100%
  • Semiconductor lasers 93%
  • semiconductor lasers 57%
  • Electrodes 57%
  • rings 51%

• Sagnac beat signals observed in semiconductor fiber-optic ring laser gyroscope

  Inagaki, K., Tamura, S., Noto, H. & Harayama, T., 2006, Optical Fiber Sensors, OFS 2006. Optical Society of America (OSA), (Optics InfoBase Conference Papers).

  研究成果: Conference contribution

  • Polarization-maintaining fiber 100%
  • laser gyroscopes 87%
  • Ring lasers 85%
  • Semiconductor optical amplifiers 84%
  • ring lasers 62%
  10 被引用数 (Scopus)

• Sagnac effect in resonant microcavities

  Sunada, S. & Harayama, T., 2006 1月 1, Optical Fiber Sensors, OFS 2006. Optical Society of America, (Optics InfoBase Conference Papers).

  研究成果

  • Microcavities 100%
  • Sagnac effect 95%
  • Angular velocity 66%
  • angular velocity 33%
  • frequency shift 30%

• Sagnac effect in resonant microcavities

  Sunada, S. & Harayama, T., 2006, Optical Fiber Sensors, OFS 2006. Optical Society of America (OSA), (Optics InfoBase Conference Papers).

  研究成果

  • Microcavities 100%
  • Sagnac effect 95%
  • Angular velocity 66%
  • angular velocity 33%
  • frequency shift 30%

• Sagnac effect in resonant microcavities

  Sunada, S. & Harayama, T., 2006, 2006 International Conference on Transparent Optical Networks, ICTON 2006. p. 92 1 p. 4013662. (2006 International Conference on Transparent Optical Networks; vol. 1).

  研究成果

  • Microcavities 100%
  • Sagnac effect 95%
  • Gyroscopes 67%
  • Standing Wave 47%
  • Wavelength 44%
  2 被引用数 (Scopus)

• Unidirectional beam emission from confocal Quasi-Stadium laser diodes

  Fukushima, T., Tanaka, T. & Harayama, T., 2006, Conference on Lasers and Electro-Optics, CLEO 2006. Optical Society of America, (Optics InfoBase Conference Papers).

  研究成果

  • Semiconductor quantum wells 100%
  • Stadiums 85%
  • Semiconductor lasers 79%
  • Resonators 60%
  • semiconductor lasers 49%
• 2005

  Chaotic behavior in quantum transport devices

  Harada, S., Kida, N., Morimoto, T., Hemmi, M., Naito, R., Sasaki, T., Aoki, N., Harayama, T., Bird, J. P. & Ochiai, Y., 2005 6月 30, PHYSICS OF SEMICONDUCTORS: 27th International Conference on the Physics of Semiconductors, ICPS-27. p. 475-476 2 p. (AIP Conference Proceedings; vol. 772).

  研究成果

  • cusps 100%
  • ballistics 90%
  • electron gas 43%
  • chaos 42%
  • transport properties 36%

• Unidirectional beam emission from confocal quasistadium laser diodes

  Fukushima, T., Tanaka, T. & Harayama, T., 2005, 2005 Conference on Lasers and Electro-Optics, CLEO. Optical Society of America, p. 574-576 3 p. CMFF6. (2005 Conference on Lasers and Electro-Optics, CLEO; vol. 1).

  研究成果

  • Stadiums 100%
  • Semiconductor lasers 93%
  • Resonators 70%