Koga-laboratory WebSite


古賀 正文(Masafumi KOGA)

所属・職名  工学部 電気電子工学科 教授


年 月
事   項


九州工業大学大学院工学研究科電子工学専攻修士課程 修了
博士(工学)(大阪大学より )
NTT未来ねっと研究所 フォトニックトランスポートシステム研究グループグループリーダ
NTT未来ねっと研究所 第1推進プロジェクト プロジェクトマネージャ:
大分大学 教授 (工学部電気電子工学科)



電子情報通信学会 業績賞
電子情報通信学会 フェロー
電子情報通信学会 通信ソサイエティ 優秀論文賞受賞


1983年−1986年 ISDNユーザ網インタフェースの研究
1986年‐1994年 高性能光サーキュレータを含む光機能回路の研究。
1994年−2006年 フォトニックネットワークシステムの研究開発
2006年−現在 次世代フォトニック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



1. 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.

2.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.

3. 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.

4. 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.

5. 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.

6. 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.

7. 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.

8. 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.

9. 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.

10. 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.

11. 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.



1.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.

2. 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

3. 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

4. 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

5.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.

6. 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.

7. 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.

8. 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.

9. 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.

10. 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.

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

12. 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.

13. 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.

14. 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.

15. 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.

16. 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.

17. 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.

18. 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.

19. 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).

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

21. 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.

22. 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).

23. 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.

24. 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.

25. 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 25件以上(内 招待講演10件以上)


1. 佐藤健一編著、古賀正文著、“広帯域光ネットワーキング技術−フォトニックネットワーク−、”(社)電子情報通信学会、2003年

2. Ken-ichi Sato, Masafumi Koga, “WDM Technologies Optical Networks Vol.III, Chapter 3,pp.65-114,” Elsevier Academic Press edited by A.K. Dutta, N.K. Dutta, and M. Fujiwawa.,2004.

3. 三木編、“光通信ハンドブック” 、分筆

4. 中沢正隆、鈴木正敏、盛岡敏夫編、“光通信技術の飛躍的高度化 −光通信の新たな挑戦−、”オプトロニクス社、分筆、2004年


1.大苗、池上、中川、古賀、手島、“.光周波数計測と通信網への応用、” 電気学会論文誌C, Vol. 119-C , No.7, pp.765-770,1999年

2.古賀、高知尾、宮本、“波長多重光伝送システムの現状と将来、” 電子情報通信学会、学会誌、2000,7月

3.滝川、古賀、佐藤、“フォトニックルータ−次世代のルータ技術の開発−、” 電子情報通信学会、学会誌、2003,2月


1.古賀 正文、“実用化の壁を越えて 、” 日本光学会、会誌「光学」、巻頭言、2013,5月


・2013年9月〜2014年1月 レーザー学会 学術講演会通信部門

                  Technical Program Committee-Chair

・2013年7月〜2015年7月 OECC International Advisery Committee (IAC) General Co-Chair

・2011年4月〜2013年12月 OECC2013 General Co-Chair(6/30〜7/4 京都開催)

・2009年3月〜2010年12月 OECC2010  Organizing Committee Member, Program Co-chair.

・2008年5月〜2011年4月電子情報通信学会 九州支部 評議員


・2005年9月〜2007年12月 OECC2007 Organizing Committee Member, Chair of Publish

・2002年 Technical Program Committee (OECC,2002,日本)

・電子情報通信学会/OECC共催 特集号 幹事 (平成15年4月〜平成16年3月)

・2000年4月〜2002年3月電子通信学会光通信システム研究会 幹事

・2000年 Technical Program Committee(0ECC,2000,日本)

Note;OECC: Optoelectronics and Communications Conference