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HOME > 研究実績・論文

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1. 基盤研究:
光周波数同期網のためのCEP制御光周波数コム高コヒーレンス化の研究

2. SCOOP受託研究:
光周波数同期フォトニックネットワークの概念実証と当該ネットワークにおける
高コヒーレンス光通信技術の研究開発

研究開発の目的:

本研究は、CEP制御光よってコヒーレンスを可能な限り高め、その結果可能となる光通信におけるSNR限界を追求し、
3桁容量拡大と消費電力問題へ貢献することを目的としている。

研究開発の概要:

光周波数安定化光に同期した光周波数コム基準をノードごとに配備して、伝送用光キャリア、位相感応型光増幅器励起光源、
ホモダイン直接受信用局発光源のいずれも当該光周波数コム基準に同期させた高コヒーレンスな光通信によって、
3年を目途に現状に比しSNRを10dB以上向上できる技術の実証を推進する。
来るべきExa-bit/sクラスの次世代フォトニックネットワークの基礎を成す技術構築を目指すものである。

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発表論文一覧(2005年ー2015年)

1.Masafumi Koga, Yusuke Shigeta, Futoshi Shirazawa, Hiroshi Ohta and Akira Mizutori "Costas Loop Homodyne Detection for 20-Gb/s QPSK Signal on the Optical Frequency Synchronous Network" JOURNAL OF LIGHTWAVE TECHNOLOGY, VOL. 33, NO. 23, DECEMBER 1, 2015

2.Yasuhiro Okamura,Koryo Higashiyama,Masafumi Koga,Atsushi Takada" Optical phase lock loop circuit for Non-degenerate optical parametric phase sensitive amplifiers with wide signal-idler optical frequency spacing " CLEO 2015, SM1M.2, May 2015.

3. T.Ohata, M.Moroi, H.Takara ,M.Koga" Optical Diversity Transmission with Signal and its Phase-conjugate Lights through Multi-core Fiber" OFC 2015, Th1D.4, March 2015

4. M.Koga, and A.Mizutor,”Decision-Directed Costas Loop Stable Homodyne Detection for 10-Gb/s BPSK Signal Transmission”,IEEE Photonics Technology Letters,Vol.26,No.4,PP.319-322,2014.

5.J.Higashiyama, Y.Tarusawa, and M.Koga,”Simply configured Radio on Fiber link yielding positive gain for mobile phone system”,IEICE Electronics Express,Vol.11,No.15,PP.1-6,2014.

6.K.Kitayama, A.Hiramatsu, M.Fukui, T.Tsuritani, N.Yamanaka, S.Okamoto, M.Jinno, M.Koga, "Photonic Network Vision 2020-Toward Smart Photonic Cloud"JOURNAL OF LIGHTWAVE TECHNOLOGY,Vol. 32, No. 16, 2014

7. M.Koga, T.Iida, T.Kobayashi, and H.Takara,”Q-value Improvement by Electrical Maximum Ratio Combining in Optical Diversity Transmission through Multi-core Fiber”,OECC2014,WE9B-2, July 2014

8. A.Takada, K.Higashiyama, E.Hamada, Y.Okamura, A.Mizutori, and M.Koga,”Optical phase Locking between pump and multiple-carrier signal lights in frequency-nondegenerate parametric phase-sensitive amplifier”,OECC2014,WEPS2-74, July 2014

9. M. Koga, A. Mizutori and T. Iida ,”Optical diversity transmission and maximum-ratio combined receiver in multi-core fiber to mitigate fiber non-linear phenomenon,” IEICE Communication Express, Vol.2, No.2, pp. 67-73, 13th Feb 2013.

10.A. Mizutori, S. Y. Set, F. Shirazawa and M. Koga, "Stable Costas Loop Homodyne Detection for 20-Gbit/s QPSK Signal Fiber Transmission," ECOC, 2013 ,to be published.

11. A. Mizutori, M. Sugamoto and M. Koga, "Demonstration of Four-wave-mixing induced Crosstalk Cancellation in 10-Gbit/s Phase Locked Multi-carrier Transmission," OECC, WR4-4, 3th July 2013.

12. Y. Sakai, M. Sugamoto, E. Nakatani and A. Mizutori, "Experiment on Phase Sensitive Amplification of BPSK Signal Using Phase-lock Costas Loop Circuit," OECC, TuPR-7, 2th July 2013.

13. A. Ishizawa, T. Nishikawa, A. Mizutori, H. Takara, A. Takada, T. Sogawa and M. Koga, "Phase Noise Characterization of a 25-GHz-Spaced,"CLEO, CTu1l7, June 2013.

14. A. Mizutori,M. Sugamoto and M. Koga, "12.5-Gbit/s BPSK Stable Optical Homodyne Detection Using 3-kHz Spectral Linewidth External-Cavity Laser Diode,"ECOC, P3.13, Sep 2012.

15. T. Iida, A. Mizutori and M. Koga, "Optical Diversity Transmission and Maximum-ratio Combine in Multi-core Fiber to Mitigate Fiber Non-linear Distortion,"OECC, 62B-5, July 2012.

16. J. Higashiyama, Y. Tarusawa and M. Koga, "4.5-dB Gain Simply and Cost-Effectively Configured,"OECC, 6A1-4, 2012.

17. A. Ishizawa, T. Nishikawa, A. Mizutori, H. Takara, H. Nakano, Tetsuomi Sogawa, A. Takada and M. Koga ,”Generation of 120-fs pulses at 1-GHz recetition rate derived from continuous wave laser diode,” Optics Express, Issue 23, Vol.19, pp.22402-22409, 2011.

18. M. Koga and A. Mizutori ,”Laser Diode Optical Frequency Stabilization by Employing Modulated Sideband Light,” 電子情報通信学会論文誌B, no.12, pp.1538-1546, 2011.

19. M. Koga, A. Takada, A. Ishizawa, T. Nishikawa and H. Takara, "Proposal of Optical Frequency Synchronized Photonic Network based on Carrier-Envelope Offset Phase Locked Frequency Comb," Korea-Japan Workshop on beyond 100G, June 2011.

20. J. Higashiyama, T. Furuta, Y. Tarusawa, A. Kodama and M. Koga, "Simply and Cost-Effectively Configured Radio on Fiber Link Demonstration for 1-GHz Frequency Band to Enhance Intercept Point,"OECC, 7A1-4 , 2011.

21. A. Mizutori, A. Kodama and M. Koga, "Phase-synchronous Chain of Two Multi-Carrier Lights Spaced at 25GH by Cancelling Micro-wave Phase Noise," IEEE International Topical Meeting on Microwave Photonics, MWP2011, Oct 2011.

22. A. ishizawa, T. Nishikawa, A. Mizutori, H. Takara, H. Nakano, T. Sogawa, A. Takada and M. Koga, "Sub-100-fs optical pulse generation at 1-GHz repetition rate with an externally phase-modulated continuous wave laser diode,"Ultrafast Optics VIII, 2011.

23. A. Ishizawa, T. Nishikawa, A. Mizutori, H. Takara, S. Aozasa, A. Mori, H. Nakano, A. Takada and M. Koga ,”Octave-spanning frequency comb generated by 250 fs pulse train emitted from 25 GHz externally phase-modulated laser diode for carrier-envelope-offset-locking,” Electron. Lett., Vol. 46, No. 19, pp 1343, 2010.

24. A. Kodama, A. Mizutori and M. Koga, "Cancellation of Four-wave Mixing Light by Carrier Phase π-Shift in Phase-Locked Multi-carrier Transmission," COIN, PS-14, July 2010.

25. A. Ishizaw, T. Nishikawa, A. Mizutori, H. Takara, S. Aozasa, A. Mor, H. Nakano, A. Takada and M. Koga, "New Approach to Achieving a Carrier-Envelope -Phase-Locked Frequency Comb with 25-GHz Mode Spacing,"CLEO/QELS, CWJ4, 2010.

26. T. Nishikawa, A. Ishizawa, A. Mizutori, H. Takara, H. Nakano, A. Takada and M. Koga, "Approach to Achieving a Carrier-Envelope -Phase-Locked Frequency Comb with 25-GHz Mode Spacing,"CLEO/QELS, CWJ4, 2010.

27. A. Mizutori, M. Koga et al. ,”Laser diode optical frequency stabilization technique on ITU-T frequency grid employing modulated sideband light,” IEE Electron. Lett., vol. 45(13), pp. 683-684, 2009.

28. A. Sahara, T. Ono, J. Yamawaku, A. Takada, S. Aizawa, and M. Koga, “Congestion-Controlled Optical Burst Switching Network With Connection Guarantee: Design and Demonstration,” IEEE Journal of Lightwave Technol., Vol.26, No.14, pp.2075-2086, 2008.

29. M. Koga, "Exploring EXA-class Network Node Technologies - Today and Future of Photonic Networks-,"Sponsored by NICT, International Sympo. on Global Optical Infrastructure Technologies towards the Next Decades, pp.92-105, 2008, (Invited Paper).

30. Y. Kisaka, S. Aisawa, M. Tomizawa, Y. Miyamoto, K. Terada, N. Iwasaki, A. Sano, H. Masuda, M. Koga and H. Ichino, “Fully transparent multiplexing and transport of 10 GbE-LANPHY signals for 44.6 Gbit=s-based RZ-DQPSK WDM transmission,” IEE Electron Lett., Vo.43, No.14, 5th July, 2007.

31. E. Yamazaki, F. Inuzuka, K. Yonenaga, A. Takada, and M. Koga, “Compensation of interchannel crosstalk induced by optical fiber nonlinearity in carrier phase-locked WDM System,” IEEE Photon. Technol. Lett., Vol. 19, No. 1, pp. 9- 11, 2007.1.

32. A. Takada and M. Koga, “Multi-granularity OXC Architecture,” in Proc. Optical Fiber Communication conference (OFC) 2007, paper OThR4, March 2007, (Invited Paper).

33. Kisaka, Y.; Aisawa, S.; Tomizawa, M.; Miyamoto, Y.; Terada, K.; Iwasaki, N.; Sano, A.; Masuda, H.; Koga, M.;” Fully transparent multiplexing and transport of 10GbE-LANPHY signals in 44.6-Gbit/s-based RZ-DQPSK WDM transmission,” IEEE Optical Fiber Communication conference(OFC)/NFOEC, OTh L1, March 2007.

34. K. Kitayama, T. Miki, T. Morioka, H. Tsushima, M. Koga, K. Mori, S. Araki, K. Sato, H. Onaka, S. Namiki, . T. Aoyama, “Photonic network R&D activities in Japan- Current activities and future perspectives -,” IEEE Jounal of Lightwave Tech., vol.23,No.10, pp.3404-3418,Oct. 2005.

35. M. Koga, “Design issues of terabit capacity photonic network in broadband era,” in Tech. Dig. of Lasers and Electro-Optics (CLEO)-Pacific Rim 2005, paper 30-2, pp. 1781-1782, 2005(Invited Paper).

36. Tomizawa, M.; Yamawaku, J.; Takigawa, Y.; Koga, M.; Miyamoto, Y.; Morioka, T.; Hagimoto, K.; “Terabit LAN with optical virtual concatenation for Grid applications with super-computers,” IEEE Optical Fiber Communication conference(OFC)/NFOEC, Technical Digest of Vol.4, March 2005.

37. Sahara, A.; Kasahara, R.; Yamazaki, E.; Aisawa, S.; Koga, M.;” The demonstration of congestion-controlled optical burst switching network utilizing two-way signaling - field trial in JGN II testbed,” IEEE Optical Fiber Communication conference(OFC)/NFOEC, Technical Digest of Vol.4, March 2005.

38. Kitayama, K.; Koga, M.; Morikawa, H.; Hara, S.; Kawai, M.;” Optical burst switching network testbed in Japan,” IEEE Optical Fiber Communication conference(OFC)/NFOEC, Technical Digest of Vol.4, March 2005.

他65件以上(1986年-2015年)