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Publication

    2021

  1. N. Yokota, H. Yasaka, K. Sugiyasu, and H. Takahashi, "Improving Detection Tolerance of Visible Light IDs with Two-Color Differential Detection Scheme," IEEE 10th Global Conference on Consumer Electronics (GCCE), pp.931-932, Online, 12-15 Oct. 2021.
  2. N. Yokota, H. Kiuchi, and H. Yasaka, "Low-phase-noise optical negative feedback laser for long-distance ranging with high signal-to-noise ratio," 27th International Semiconductor Laser Conference (ISLC), WA1.3, Online, 10-14 Oct. 2021.
  3. N. Yokota, K. Ikeda, and H. Yasaka, "Spin-VCSELs for analog radio-over-fiber systems in 5G and beyond (Invited)," SPIE Optics+Photonics, paper 11805-42, Online, 1-5 Aug. 2021.
  4. N. Yokota and H. Yasaka, "Spin Laser Local Oscillators for Homodyne Detection in Coherent Optical Communications," Micromachines 12, 573 (2021).
  5. N. Yokota, K. Ikeda, and H. Yasaka, "Spin-Injected Birefringent VCSELs for Analog Radio-Over-Fiber Systems," IEEE Photon. Technol. Lett. 33, 297 (2021).
  6. N. Yokota and H. Yasaka, "Cascaded SSB comb generation using injection-locked seed lasers," Opt. Lett. 46, 769 (2021).
  7. 2020

  8. N. Yokota, H. Yasaka, K. Sugiyasu, and H. Takahashi, "Motion-Tolerant Method for Extracting Spatially Distributed Visible Light IDs," 2020 IEEE 9th Global Conference on Consumer Electronics (GCCE), pp.267-268, Online, 13-16 Oct. 2020.
  9. N. Yokota, H. Kiuchi, and H. Yasaka, "Role of modulation bandwidth in narrow spectral linewidth semiconductor lasers under optical negative feedback," Jpn. J. Appl. Phys. 59, 102001 (2020).
  10. N. Yokota, K. Ikeda, and H. Yasaka, "Numerical investigation of direct IQ modulation of spin-VCSELs for coherent communications (Invited)," SPIE Optics+Photonics, paper 11470-87, Online, 24-28 Aug. 2020.
  11. M. Kanno, N. Yokota, and H. Yasaka, "Measurement of Intrinsic Modulation Bandwidth of Hybrid Modulation Laser," IEEE Photon. Technol. Lett. 32, 839 (2020).
  12. S. Sato, G. Aizawa, N. Yokota, and H. Yasaka, "Performance improvement of optical negative feedback laser by reducing feedback loop length," IEICE Electron. Express 17, 20190750 (2020).
  13. 2019

  14. N. Yokota and H. Yasaka, "Multi-wavelength discrete pulse train generation using chromatic aberration of time lens for ultrafast single-shot optical imaging," Opt. Rev. 26, 713 (2019).
  15. N. Yokota, H. Yasaka, K. Sugiyasu, and H. Takahashi, "Spatial Distribution Extraction of Visible Light IDs for Supporting Robotic Rescue Efforts," 2019 IEEE 8th Global Conference on Consumer Electronics (GCCE), pp.7-8, Osaka, Japan, 15-18 Oct. 2019. Excellent Paper Award
  16. N. Yokota, K. Komukai, M. Yoshida, and H. Yasaka, "Numerical Investigation of Mutually Injection-Locked Semiconductor Lasers for Direct IQ-Signal Generation," IEEE Photon. J. 11, 6602611 (2019).
  17. N. Yokota, K. Nisaka, K. Ikeda, and H. Yasaka, "Spin polarization modulation of 1.55-m VCSELs for high-speed data communications (Invited)," SPIE Optics+Photonics, paper 11090-114, San Diego, CA, 11-15 Aug. 2019.
  18. 2018

  19. N. Yokota, K. Nisaka, H. Yasaka, and K. Ikeda, "Spin polarization modulation for high-speed vertical-cavity surface-emitting lasers," Appl. Phys. Lett. 113, 171102 (2018).
  20. K. Aoyama, S. Kobayashi, M. Wada, N. Yokota, T. Kita, and H. Yasaka, "Compact narrow-linewidth optical negative feedback laser with Si optical filter," Appl. Phys. Express 11, 112703 (2018).
  21. N. Yokota, H. Yasaka, K. Sugiyasu, and H. Takahashi, "Motion Tolerance for Dynamic Object Recognition Using Visible Light IDs," IEEE 7th Global Conference on Consumer Electronics (GCCE), pp.667-668, Nara, Japan, 9-12 Oct. 2018.
  22. K. Aoyama, N. Yokota, and H. Yasaka, "Strategy of optical negative feedback for narrow linewidth semiconductor lasers," Opt. Express 26, 21159 (2018).
  23. M. Kanno, S. Mieda, N. Yokota, W. Kobayashi, and H. Yasaka, "Chirp Control of Semiconductor Laser by Using Hybrid Modulation (Invited)," IEICE Trans. Electron. E101-C, 561 (2018).
  24. N. Yokota, K. Nisaka, H. Yasaka, and K. Ikeda, "High-Speed Modulation of 1.55-m VCSELs with Spin Polarization Modulation," Conference on Lasers and Electro-Optics (CLEO), paper STu3Q.2, San Jose, CA, 13-18 May. 2018.
  25. K. Aoyama, N. Yokota, and H. Yasaka, "3-kHz Spectral Linewidth Laser Assembly With Coherent Optical Negative Feedback," IEEE Photon. Technol. Lett. 30, 277 (2018).
  26. 2017

  27. K. Aoyama, S. Kobayashi, M. Wada, N. Yokota, and H. Yasaka, "Stable and Narrow Linewidth Semiconductor Laser Assembly with Coherent Optical Negative Feedback," Conference on Lasers and Electro-Optics (CLEO), paper JTu5A.101, San Jose, CA, 14-19 May. 2017.
  28. N. Yokota, R. Igarashi, and H. Yasaka, "Optical Nyquist pulse generation by using a dual-electrode Mach-Zehnder modulator," Opt. Lett. 42, 1856 (2017). Highlighted as Editor's Pick
  29. N. Yokota, R. Takeuchi, H. Yasaka, and K. Ikeda, "Lasing Polarization Characteristics in 1.55-m Spin-Injected VCSELs," IEEE Photon. Technol. Lett. 29, 711 (2017).
  30. 2016

  31. S. Mieda, N. Yokota, R. Isshiki, W. Kobayashi, and H. Yasaka, "Frequency response control of semiconductor laser by using hybrid modulation scheme," Opt. Express 24, 25824 (2016).
  32. S. Mieda, R. Isshiki, N. Yokota, W. Kobayashi, H. Yasaka, "Tailoring of Semiconductor Laserfs Frequency Response by Hybrid Modulation Scheme," 25th International Semiconductor Laser Conference (ISLC 2016), paper WE23, Kobe, Japan, 12-15 Sep. 2016.
  33. S. Mieda, N. Yokota, W. Kobayashi, and H. Yasaka, "Transmission Performance Improvement of Semiconductor Lasers by Hybrid Modulation Scheme," Compound Semiconductor Week (CSW), paper ThD1-7.4, Toyama, Japan, 26-30 Jun. 2016.
  34. N. Yokota and H. Yasaka, "Operation Strategy of InP Mach-Zehnder Modulators for Flat Optical Frequency Comb Generation," IEEE J. Quantum. Electron. 52, 5200207 (2016).
  35. N. Yokota, K. Abe, S. Mieda, R. Igarashi, and H. Yasaka, "Tailoring of Optical Frequency Comb Shape by Harmonic Signal Superposition in Mach-Zehnder Modulator," Conference on Lasers and Electro-Optics (CLEO), paper SF1G.4, San Jose, CA, 5-10 Jun. 2016.
  36. S. Mieda, N. Yokota, W. Kobayashi, and H. Yasaka, "Ultra-Wide-Bandwidth Optically-Controlled DFB Laser with External Cavity," IEEE J. Quantum. Electron. 52, 2200107 (2016).
  37. S. Mieda, N. Yokota, W. Kobayashi, and H. Yasaka, "Ultra-high-speed semiconductor light source for next-generation optical communication system (Invited)," Energy Materials Nanotechnology (EMN) Meeting, paper T11, Beijing, China, 21-25 Apr. 2016.
  38. H. Yasaka, K. Aoyama, and N. Yokota, "Phase Noise Reduction in Semiconductor Lasers by Optical Negative Feedback (Invited)," SPIE Photonics Europe 2016, Paper 9892-12, Brussels, Belgium, 3-7 Apr. 2016.
  39. N. Yokota, K. Abe, S. Mieda, and H. Yasaka, "Harmonic superposition for tailored optical frequency comb generation by a Mach-Zehnder modulator," Opt. Lett. 41, 1026 (2016).
  40. 2015

  41. N. Yokota, Y. Aoshima, K. Ikeda, N. Nishizawa, H. Munekata, and H. Kawaguchi, "Room temperature spin injection into (110) GaAs quantum wells using Fe/x-AlOx contacts in the regime of current density comparable to laser oscillation," J. Appl. Phys. 118, 163905 (2015).
  42. N. Yokota and H. Yasaka, "Flat Optical Frequency Comb Generated by Semiconductor Mach-Zehnder Modulator," 6th RIEC-RLE Meeting on Research Collaboration in Photonics, pp. 293-305, Miyagi, Japan, 26-27 Oct. 2015.
  43. K. Aoyama, "Spectral Narrowing of Semiconductor Laser by Coherent Optical Negative Feedback," 2nd 2015 Tohoku Univ.-MIT Student Meeting on Research Collaboration in Photonics and Electronics, pp. 221-229, Miyagi, Japan, 27-28 Aug. 2015.
  44. N. Yokota, K. Ikeda, N. Nishizawa, H. Munekata, and H. Kawaguchi, "Electron spin injection and transport in (110) quantum wells for room temperature operation of spin-controlled vertical-cavity surface-emitting lasers (Invited)," SPIE Optics+Photonics, Paper 9551-41, San Diego, California, USA, 9-13 Aug. 2015.
  45. N. Yokota, T. Miki, K. Abe, and H. Yasaka, "Nonlinearity of Semiconductor Mach-Zehnder Modulator for Flat Optical Frequency Comb," IEEE Photon. Technol. Lett. 27, 2219 (2015).
  46. S. Mieda, S. Shiratori, N. Yokota, W. Kobayashi, and H. Yasaka, "Intra-cavity loss modulation for ultra-high-speed direct modulation lasers based on photon-photon resonance," Appl. Phys. Express 8, 082701 (2015).
  47. N. Yokota, T. Miki, K. Abe, E. Yamada, and H. Yasaka, "Numerical Analysis for Optical Frequency Comb Generated by Semiconductor Mach-Zehnder Modulator," The 20th Optoelectronics and Communications Conference (OECC 2015), paper JWeC.23, Shanghai, China, Jun.28-Jul.2, 2015.
  48. S. Mieda, S. Shiratori, N. Yokota, W. Kobayashi, and H. Yasaka, "Gently-sloped Small Signal Response by Intra-cavity Loss Modulation," The 20th Optoelectronics and Communications Conference (OECC 2015), paper JTuA.24, Shanghai, China, Jun.28-Jul.2, 2015.
  49. S. Mieda, "High-speed Semiconductor Laser for Next Gen. Ethernet," 2015 MIT-Tohoku Univ. Student Meeting on Research Collaboration in Photonics and Electronics, pp. 104-112, Boston, USA, 17-18 Mar. 2015.
  50. K. Aoyama, R. Yoshioka, N. Yokota, W. Kobayashi, and H. Yasaka, "Optical Negative Feedback for Linewidth Reduction of Semiconductor Lasers," IEEE Photon. Technol. Lett. 27, 340 (2015).
  51. S. Mieda, S. Shiratori, N. Yokota, W. Kobayashi, H. Yasaka, "Ultra-high-speed Operation of Laser Diode with External Cavity by Cross-gain Modulation," Appl. Phys. Express 8, 022701 (2015).
  52. 2014

  53. K. Aoyama, R. Yoshioka, N. Yokota, W. Kobayashi, and H. Yasaka, "Experimental Demonstration of Linewidth Reduction of Laser Diode by Compact Coherent Optical Negative Feedback System," Appl. Phys. Express 7, 122701 (2014). Highlighted by Nature Photonics, vol. 9, p. 7, Jan. 2015.
  54. S. Mieda, S. Shiratori, W. Kobayashi, and H. Yasaka, "High Bandwidth Operation of Optically Controlled Semiconductor Laser with External Cavity," IEEE Photon. Technol. Lett. 26, 2319 (2014).
  55. K. Aoyama, R. Yoshioka, N. Yokota, W. Kobayashi, and H. Yasaka, "Narrow-linewidth Laser Diode with Compact Optical-feedback System," 2014 International Topical Meeting on Microwave Photonics / The 9th Asia-Pacific Microwave Photonics Conference (MWP/APMP 2014), paper TuEA-2, Hokkaido, Japan, October 2014.
  56. S. Mieda, S. Shiratori, N. Yokota, W. Kobayashi, and H. Yasaka, "High-speed Optically Controlled Semiconductor Light Source with an External Cavity," 2014 International Topical Meeting on Microwave Photonics / The 9th Asia-Pacific Microwave Photonics Conference (MWP/APMP 2014), paper TuEB-6, Hokkaido, Japan, October 2014.
  57. H. Yasaka, K. Aoyama, R. Yoshioka, and N. Yokota, "Compact Narrow Linewidth Semiconductor Laser Source," 4th RIEC-RLE Meeting on Research Collaboration in Photonics pp. 206-213, 2014. (Sendai, Miyagi, 1-2, July)
  58. K. Aoyama, R. Yoshioka, N. Yokota, and H. Yasaka, "Compact Narrow Linewidth Semiconductor Laser Source," 4th RIEC-RLE Meeting on Research Collaboration in Photonics pp. 245, 2014. (Sendai, Miyagi, 1-2, July)
  59. T. Yamamoto, T. Saikai, E. Yamada, and H. Yasaka, "Tailored Optical Frequency Comb Block Generation using InP-based Mach-Zehnder Modulator," IEICE Transactions on Electronics, vol. E97-C, No. 3, pp. 222-224, 2014. (Mar.)
  60. N. Yokota, Y. Yasuda, K. Ikeda, and H. Kawaguchi,gElectron spin relaxation time in (110) InGaAs/InAlAs quantum wells,hJ. Appl. Phys. 116, 023507 (2014).
  61. 2013-2010

  62. T. Yamamoto, K. Hitomi, W. Kobayashi, and H. Yasaka, gOptical Frequency Comb Block Generation by using Semiconductor Mach-Zehnder Modulator,h IEEE Photonics Technology Letters, vol. 25, No. 1, pp. 40-42, 2013. (Jan.)
  63. H. Yasaka, "Optical Frequency Comb Block Generation Using InP Mach-Zehnder Modulator," 2nd RIEC-RLE Meeting on Research Collaboration in Photonics, pp. 101-114, Jan., 2013. (Sendai, Miyagi, 21-22, Jan.)
  64. T. Saikai, T. Yamamoto, E. Yamada, and H. Yasaka, "Flat-top Optical Frequency Comb Block Generation using InP-based Mach-Zehnder Modulator," The 25th International Conference on Indium Phosphide and Related Materials (IPRM2013), MoD3-3, May, 2013. (Kobe, Hyogo, 20-23 May)
  65. Hiroshi Yasaka and Yasuo Shibata, gFiber Optic Communication - Key Devices,hChapter 6, gSemiconductor-based Modulators,h
  66. ISBN 978-3-642-20516-3, pp. 227-280, Springer-Verlag (Berlin, Heidelberg), 2012.
  67. H. Ishihara, Y. Saito, W. Kobayashi, and H. Yasaka, gBandwidth enhanced operation of single mode semiconductor laser by intensity modulated signal light injection,h IEICE Transactions on Electronics, vol. E95-C, No. 9, pp. 1549-1551, 2012. (Sep.)
  68. H. Ishihara, H. Yasaka, and J. Shikata, gHigh-Speed Control of Semiconductor Laser by Gain Modulation,h The 3rd Student Organizing International Mini-Conference on Information Electronics Systems (SOIM-GCOE10), F7P-6, Nov., 2010. (Sendai, Miyagi, 25-26 Nov.)
  69. 2009

  70. N. Kikuchi, K. Tsuzuki, T. Kurosaki, Y. Shibata, and H. Yasaka, gHigh-Speed, Low-Driving-Voltage Dual-Drive InP-Based Mach-Zehnder Modulator (Invited),h IEICE Transactions on Electronics, vol. E92-C, No. 2, pp. 205-211, Feb. 2009. (Feb.)
  71. K. Tsuzuki, Y. Shibata, N. Kikuchi, M. Ishikawa, T. Yasui, H. Ishii, and H. Yasaka, gFull C-band tunable DFB laser array co-packaged with InP Mach-Zehnder modulator for DWDM optical communication systems,h IEEE Journal of Selected Topics in Quantum Electronics, vol. 15, No. 3, pp. 521-527, 2009. (May/June)
  72. N. Kikuchi, Y. Shibata, K. Tsuzuki, H. Sanjoh, T. Sato, E. Yamada, T. Ishibashi, and H. Yasaka, g80-Gb/s Low-Driving-Voltage InP DQPSK Modulator With an n-p-i-n Structure,h IEEE Photonics Technology Letters, vol. 21, No. 12, pp. 787-789, 2009. (June)
  73. J. Shikata, Y. Nomura, and H. Yasaka, gSurface-plasmon terahertz-wave resonator for high-resolution imaging beyond diffraction limit,h Interdisciplinary Science of Nanomaterials, P-20, Sept. 2009 (Sendai, Miyagi, 24-25 Sept.).@
  74. J. Shikata, Y. Nomura, H. Yasaka, H. Minamide, and H. Ito, gTerahertz imaging beyond diffraction limit,h 36th IEEE Nano-Spin Engineering Workshop, April 2009 (Sendai, Miyagi, 17 April).
  75. 2008

  76. T. Yasui, Y. Shibata, K. Tsuzuki, N. Kikuchi, M. Ishikawa, Y. Kawaguchi, M. Arai, and H. Yasaka, g10-Gb/s 100-km SMF Transmission Using InP Mach-Zehnder Modulator Monolithically Integrated with Semiconductor Optical Amplifier,h IEEE Photonics Technology Letters, vol. 20, No. 13, pp. 1178-1180, 2008. (July)
  77. S. Matsuo, T. Kakitsuka, T. Segawa, R. Sato, Y. Shibata, R. Takahashi, H. Oohashi, and H. Yasaka, g4 x 25 Gb/s Frequency-Modulated DBR Laser Array for 100-GbE 40-km Reach Application,h IEEE Photonics Technology Letters, vol. 20, No. 17, pp. 1494-1496, 2008. (Sep.)
  78. Y. Shibata, N. Kikuchi, K. Tsuzuki, W. Kobayashi, and H. Yasaka, g40 Gbit/s DPSK modulation using an InGaAs-InAlAs MQW n-i-n Mach-Zehnder modulator,h IET Electronics Letters, Vol. 44, No. 21, pp. 1269-1270, 2008. (Oct.)
  79. H. Fukano, T. Sato, M. Mitsuhara, Y. Kondo, and H. Yasaka, gInP/InGaAs Heterojunction Phototransistor Operating at Wavelengths above 2um Realized Using Strained InAs/InGaAs Multiquantum Well Absorption Layer,h Japanese Journal of Applied Physics, Part 1, Vol. 47, No. 10, pp. 7909-7914, 2008. (Oct.)
  80. H. Yasaka, N. Kikuchi, K. Tsuzuki, N. Ishikawa, T. Yasui, and Y. Shibata, gAdvances in InP Mach-Zehnder modulators for large capacity photonic network systems (Invited),h Proc. 20th International Conference on Indium Phosphide and Related Materials (IPRM2008), Versalles, France, ThA1.1, 2008. (Versalles, France, 25-29 May)
  81. T. Yasui, Y. Shibata, N. Kikuchi, K. Tsuzuki, Y. Kawaguchi, M. Arai, and H. Yasaka, g10-Gbit/s optical duobinary transmission using lossless InP n-p-i-n Mach-Zehnder modulator with semiconductor optical amplifier,h Proc. 20th International Conference on Indium Phosphide and Related Materials (IPRM2008), Versalles, France, ThA1.2, 2008. (Versalles, France, 25-29 May)
  82. M. Ishikawa, K. Tsuzuki, N. Kikuchi, K. Kasaya, Y. Shibata, H. Ishii, H. Oohashi, and H. Yasaka, g10-Gb/s Full C-band Operation of InP Mach-Zehnder Modulator Co-packaged with Tunable Laser Array under Constant Modulation Voltage,h Proc. Opto-Electronics and Communications Conference (OECC) and the Australian Conference on Optical Fibre Technology (ACOFT) (OECC/ACOFT2008), Sydney, Australia, WeR-3, 2008. (Sydney, Australia, 8-10 Jul.)
  83. N. Kikuchi, K. Tsuzuki, M. Ishikawa, T. Yasui, Y. Shibata, and H. Yasaka, gInP Mach-Zehnder Modulators for Advanced Modulation Formats (Invited),h Proc. Topical Meeting on Integrated Photonics and nanophotonics Research and Applications (IPNRA2008), Boston, MA, IMA4, 2008. (Boston, MA, 13-16 Jul.)
  84. K. Tsuzuki, Y. Shibata, N. Kikuchi, M. Ishikawa, T. Yasui, H. Ishii, and H. Yasaka, g10-Gbit/s, 200 km duobinary SMF transmission using a full C-band tunable DFB laser array co-packaged with InP Mach-Zehnder modulator,h Proc. 21st International Semiconductor Laser Conference (ISLC2008), Sorrento, Italy, MB6, 2008. (Sorrento, Italy, 14-18 Sep.)
  85. N. Kikuchi, K. Tsuzuki, Y. Shibata, M. Ishikawa, T. Yasui, H. Ishii, H. Oohashi, T. Ishibashi, T. Akeyoshi, H. Yasaka, and F. Kano, gFull L-band 40-Gbit/s Operation of Compact InP-DQPSK Modulator Module with Low Constant Driving Voltage of 3.5 Vpp,h Proc. 34th European Conference on Optical Communications (ECOC2008), Brussels, Belgium, Mo.3.C.4, Sept., 2008. (Brussels, Belgium, 21-25 Sep.)
 top                            Yasaka lab., Research Institute of Electrical Communication, Tohoku University