PUBLICATIONS

Papers

1. S. Yamamoto, T. Yoshimatsu, H. Takara, T. Komukai, Y. Hashizume, H. Kubota, H. Masuda, M. Jinno, and A. Takada, "Influence of Intrachannel Crosstalk With Frequency Dependence on Signal Degradation in Optical Switch Network," J. Lightwave Technol. Vol.27, 5716-5722, 2009.

2. Hirokazu Kubota, Satoki Kawanishi and Masaya Notomi; "Simple analysis of water-filled hollow-core silica photonic bandgap fiber”, IEICE Electron. Express, Vol. 6, No. 12, pp.870-875, 2009.

3. 久保田 寛和「偏波保持フォトニック結晶ファイバー」レーザー研究 vol. 34, No. 1, pp. 22-25, Jan. 2006.

4. S. Kawanishi, T. Yamamoto, H. Kubota, M. Tanaka, S. Yamaguchi; "Dispersion Controlled and Polarization Maintaining Photonic Crystal Fibers for High Performance Network Systems, " IEICE Trans. Electron. Vol.E87-C No.3 p.336 Mar. 2004.

5. T. Yamamoto, H. Kubota, S. Kawanishi, M. Tanaka and S. Yamaguchi; "Highly nonlinear dispersion-flattened polarization-maintaining photonic crystal fiber in 1.55 um region," IEICE Trans. Electron. Vol. E87-C, No. 2, pp. 250-252, Feb. 2004.

6. H. Kubota, S. Kawanishi, S. Koyanagi, M. Tanaka and S. Yamaguchi; "Absolutely single polarization photonic crystal fiber," IEEE PTL Vol. 16, No. 1, pp. 182-184, Jan. 2004.

7. T. Yamamoto, H. Kubota, S. Kawanishi, M. Tanaka and S. Yamaguchi; "Supercontinuum generation at 1.55um in a dispersion-flattened pilarization-maintaining photonic crystal fiber," Opt. Express Vol. 11, No. 13, pp. 1537-1540, June 2003.

8. M. Nakazawa, A. Sahara and H. Kubota; "Propagation of solitonlike nonlinear pulse in average normal group-velocity dispersion and its unsuitablity for high-speed, long-distance optical transmission," J. Opt. Soc. Am. B Vol. 18, No. 4, pp. 409-418, Apr. 2001.

9. K. Suzuki, H. Kubota, S. Kawanishi, M. Tanaka and M. Fujita; "High-speed bi-directional polarization division multiplexed optical transmission in ultra low-loss (1.3 dB/km) polarization-maintainig photonic crystal fibre," Electrion. Lett. Vol. 37, No. 3, pp. 1-2, Nov. 2001.

10.  K. Suzuki, H. Kubota, S. Kawanishi, M. Takana and M. Fujita; "Optical properties of a low-loss polarization-maintaining photonic crystal fiber," Opt. Express Vol. 9, No. 13, pp. 676-680, Dec. 2001.

11.  久保田寛和 , 中沢正隆; "光ソリトンパルスのシミュレーション技術," 電子情報通信学会誌 Vol. 83, No. 11, pp. 866-871, 2000.

12.  久保田寛和, 田村公一, 中沢正隆; "ソリトン効果を用いた広帯域光源のコヒーレンスに対するASE雑音の影響," 電子情報通信学会論文誌 Vol. J83-C, No. 11, pp. 1005-1011, 2000.

13.  M. Nakazawa, H. Kubota, K. Suzuki, E. Yamada and A. Sahara; "Ultrahigh-speed long-distance TDM and WDM soliton transmission technologies," IEEE J. select. QE Vol. 6, No. 2, pp. 363-196, Apr 2000.

14.  M. Nakazawa, H. Kubota, K. Suzuki, E. Yamada and A. Sahara; "Recent Progress in soliton transmission technology," CHAOS Vol. 10, No. 3, pp. 486-514, Sep. 2000.

15.  A. Sahara, T. Inui, T. Komukai, H. Kubota and M. Nakazawa; "40 Gbit/s RZ transmission over a transoceanic distance in dispersion managed standard fiber using modified inline synchronous modulation method," J. Lightwave Technol. Vol. 18, No. 10, pp. 1364-1373, Oct. 2000.

16.  H. Kubota, K. R. Tamura and M. Nakazawa; "Analyses of coherence-maintained ultrashort optical pulse train and supercontinuum generation in the presence of soliton-ASE interaction," to be published in JOSA B, 1999.

17.  A. Sahara, H. Kubota and M. Nakazawa; "Compensation of the dispersion allocated WDM(10Gbit/s x 10 channels) optical soliton and NRZ systems using a Q map," Opt. Commun. Vol. 160, pp. 139-145, feb. 1999.

18.  M. Nakazawa, H. Kubota and K. Tamura; "Random evolution and coherence degradation of a high-order optical soliton train in the presence of noise," Opt. Lett. Vol. 24, No. 5, pp. 318-320, Mar 1999.

19.  M. Nakazawa, K. Suzuki, H. Kubota, A. Sahara and E. Yamada; "160 Gbit/s WDM (20 Gbit/s x 8 channels) soliton transmission over 10000 km using in-line synchronous modulation and optical filtering," Electron. Lett., Vol. 34, No. 1, pp. 103-104, January 1998.

20.  M. Nakazawa, K. Tamura, H. Kubota and E. Yoshida; "Coherence degradation in the process of supercontinuum generation in an optical fiber," Optical Fiber Technology Vol. 1, pp. 215-223, April 1998.

21.  M. Nakazawa, H. Kubota, A. Sahara and K. Tamura; "Time-domain ABCD matrix formalism for laser mode-locking and optical pulse transmission," IEEE J. Quantum Electron. Vol. 34, No. 7, pp. 1075-1081, July 1998.

22.  A. Sahara, K. Suzuki, H. Kubota, T. Komukai, E. Yamada, T. Imai, K. Tamura and M. Nakazawa; "Single channel 40 Gbit/s soliton transmission field experiment over 1000 km in Tokyo metropolitan optical loop network using dispersion compensation," Electron. Lett. Vol. 34, No. 22, pp. 1-2, Oct. 1998.

23.  中沢正隆, 佐原明夫 and 久保田寛和; "分散アロケートしたソリトンによるパワーマージンの増加とQマップ法による伝送性能の評価 - ＤＡソリトン, NRZ, ゼロ分散でのRZパルスの性能比較 -," 電子情報通信学会論文誌 Vol. J80-B-I, No. 3, pp. 148-158, Mar. 1997.

24.  M. Nakazawa, A. Sahara and H. Kubota; "Markend increase in the power margin through the use of dispersion-allocated soliton and evaluation of transmission characteristics using Q mapping---Comparison between D-A soliton, NRZ pulse and RZ pulse at zero GVD---," IEICE Vol. J80-B-I, No. 3, pp. 148-158, March 1997.

25.  E. Yamada, H. Kubota, T. Yamamoto, A. Sahara and M. Nakazawa; "10 Gbit/s, 10,600 km, dispersion-allocated soliton transmission using conventional 1.3 mm singlemode fibers," Electron. Lett. Vol. 33, No. 7, pp. 602-603, March 1997.

26.  A. Sahara, H. Kubota and M. Nakazawa; "Experiments and analyses of 20 Gbit/s soliton transmission systems using installed optical fiber cables," IEICE Vol. J80-C-I, No. 5, pp. 204-212, May 1997.

27.  M. Nakazawa, K. Suzuki, H. Kubota, A. Sahara and E. Yamada; "100 Gbit/s WDM (20 Gbit/sx5 channels) soliton transmission over 10,000 km using in-line synchronous modulation and optical filtering," Electron. Lett. Vol. 33, No. 14, pp. 1233-1234, July 1997.

28.  A. Sahara, H. Kubota and M. Nakazawa; "Optimum fiber dispersion for two-step dispersion-allocated optical soliton, RZ at zero GVD and NRZ systems," IEEE Photon. Tech. Lett. Vol. 9, No. 8, pp. 1179-1181, August 1997.

29.  M. Nakazawa, E.Yamada, H. Kubota, T. Yamamoto and A. Sahara; "Numerical and experimental comparison of soliton, RZ pulse and NRZ pulses under two-step dispersion allocation," Electron. Lett. Vol. 33,, No. 17, pp. 1480-1482, August 1997.

30.  M. Nakazawa, H. Kubota and K. Tamura; "Nonlinear pulse transmission through an optical fiber at zero-average group velocity dispersion," IEEE Photo.Technol. Lett. Vol. 8, No. 3, pp. 452-454, Mar. 1996.

31.  M. Nakazawa, H. Kubota, A. Sahara and K. Tamura; "Marked increase in the power margin through the use of a dispersion allocated soliton," IEEE, Photon. Tech. Lett. Vol. 8, No. 8, pp. 1088-1090, Aug. 1996.

32.  M. Nakazawa, H. Kubota and E. Yamada; "Generation and transmission of optical soliton pulses," IEICE Vol. J79-C-I, No. 8, pp. 265-277, Aug. 1996.

33.  A. Sahara, H. Kubota and M. Nakazawa; "Q-factor contour mapping for evaluation of optical transmission systems: soliton against NRZ against RZ pulse at zero group velocity dispersion," Electron. Lett. Vol. 32, No. 10, pp. 915-916, 1996.

34.  M. Nakazawa, H. Kubota, A, Sahara and K. Tamura; "Marked increase in the power margin through the use of a disperison-allocated soliton," IEEE Photon. Technol. Lett. Vol. 8, No. 8, pp. 1088-1090, 1996.

35.  M. Nakazawa, K. Suzuki, H. Kubota, Y. Kimura, E. Yamada, K. Tamura, T. Komukai and T. Imai; "40 Gbit/s WDM (10 Gbit/s x 4 unequally spacedchannels) soliton transmission over 10000 km using synchronous modulationand narrow band optical filtering," Electron. Lett. Vol. 32, No. 9, pp. 828-829, 1996.

36.  M. Nakazawa, K. Suzuki, H. Kubota and E.Yoshida; "60 Gbit/s WDM (20 Gbit/sx3 unequally spaced channels) soliton transmission over 10000 km using in-line synchronous modulation and optical filtering," Electron. Lett. Vol. 32, No. 18, pp. 1686-1687, August 1996.

37.  H. Kubota and M. Nakazawa; "Soliton Transmission control for ultra high speed system," IEICE Trans. Electron Vol. E78C, No. 1, pp. 5-11, 1995.

38.  M. Nakazawa, Y. Kimura, K. Suzuki, H. Kubota, T. Komukai, E. Yamada, T. Sugawa, E. Yoshida, T. Yamamoto, T. Imai, A. Sahara, O. Yamauchi and M. Umezawa; "Soliton transmission at 20 Gbit/s over 2000 km in Tokyo metropolitan optical network," Electron. Lett. Vol. 31, No. 17, pp. 1478-1479, Aug. 1995.

39.  M. Nakazawa and H. Kubota; "Optical soliton communication in a positively and negatively dispersion allocated optical fiber transmission line," Electron. Lett. Vol. 31, No. 3, pp. 216-217, 1995.

40.  M. Nakazawa and H. Kubota; "Construction of a dispersion-allocated soliton transmission line using conventional dispersion-shifted nonsolioton fibers," Jpn. J Appl. Phys. Vol. 34, No. 6A, pp. L681-L683, 1995.

41.  M. Nakazawa, Y. Kimura, K. Suzuki, H. Kubota, T. Komukai, E. Yamada, T. Sugawa, E. Yoshida, T. Yamamoto, T. Imai, A. Sahara, H. Nakazawa, O. Yamauchi and M. Umezawa; "Field demonstration of soliton transmission at 10 Gbit/s over 2000 km in Tokyo metropolitan optical loop network," Electron. Lett. Vol. 31, No. 12, pp. 992-994, 1995.

42.  T. Sugawa, K. Kurokawa, H. Kubota and M. Nakazawa; "Polarization dependence of soliton interactions in femtosecond soliton transmission," IEICE Trans. Electron. Vol. E78-C, No. 1, pp. 28-37, 1995.

43.  M. Nakazawa and H. Kubota; "Analyses of the Dispersion-allocated bright and dark solitons," Jpn. J Appl. Phys. Vol. 34, No. 7B, pp. L889-L891, 1995.

44.  T. Sugawa, H. Kubota and M. Nakazawa; "Polarization dependence of femtosecond soliton-soliton interaction on dispersion-shifted fiber," Opt. Lett. Vol. 20, No. 13, pp. 1453-1455, 1995.

45.  M. Nakazawa and H. Kubota; "Optical soliton communication in a positively and negatively dispersion-allocated optical fiber trnasmisison line," Electron. Lett. Vol. 31, No. 3, pp. 216-217, Feb. 1995.

46.  K. Suzuki, E. Yamada, H. Kubota and M. Nakazawa; "Optical soliton communication system using erbium-doped fiber amplifiers," fiber and Integrated optics Vol. 13, pp. 45-64, 1994.

47.  K. Kurokawa, H. Kubota and M. Nakazawa; "Femtosecond soliton interactions in a Distributed Erbium-doped fiber amplifier," IEEE J. QE Vol. 30, No. 9, pp. 2220-2226, 1994.

48.  M. Nakazawa, K. Suzuki, H. Kubota, E. Yamada and Y. Kimura; "Straight-line soliton data transmision at 20 Gbit/s beyond Gordon-Haus limit," Electron. Lett. Vol. 30, No. 16, pp. 1331-1332, 1994.

49.  M. Nakazawa, E. Yoshida, H. Kubota and K. Kimura; ""Generation of a 170fs, 10GHz transform limited pulse train at 1.55 ｵm using a dispersion-decreasing, erbium-doped active soliton compressor"," Electron. Lett. Vol. 30, No. 24, pp. 2038-2040, 1994.

50.  T. Sugawa, K. Kurokawa, H. Kubota and M. Nakazawa; "Soliton Self-Frequency Shift in Orthogonally polarized femtosecond solitons," Electron. Lett. Vol. 30, No. 23, pp. 1963-1964, 1994.

51.  H. Kubota and M. Nakazawa; "Soliton Transmission control in time and frequency domains," IEEE J. QE Vol. 29, No. 7, pp. 2189-2197, 1993.

52.  久保田　寛和 and 中沢　正隆; "時間および周波数領域における光ソリトンの制御," 信学会論文誌 Vol. J76C1, No. 5, pp. 147-157, 1993.

53.  H. Kubota and M. Nakazawa; "Soliton transmission with long amplifier spacing under soliton control," Electron. Lett. Vol. 29, No. 20, pp. 1780-1781, 1993.

54.  M. Nakazawa and H. Kubota; "Reply: ," Electron. Lett. Vol. 29, No. 2, pp. 226-227, 1993.

55.  M. Nakazawa, K. Suzuki, E. Yamada, H. Kubota, Y. Kimura and M. Takaya; "Experimental demonstration of soliton data transmission over unlimited distances with soliton control in time and frequency domains," Electron. Lett. Vol. 29, No. 9, pp. 729-730, 1993.

56.  E. Yamada, K. Suzuki, H. Kubota and M. Nakazawa; "Ultrahigh speed optical soliton communication using erbium-doped fiber amplifiers," IEICE Trans. Commun. Vol. E76-B, No. 4, pp. 410-419, 1993.

57.  山田　英一, 久保田　寛和 and 中沢　正隆; "非線形ループミラーによるソリトン伝送信号からの自然放出光雑音(ASE)の除去," 信学論 Vol. J76-C-I, No. 4, pp. 81-88, 1993.

58.  M. Nakazawa, K. Suzuki, E. Yamada, H. Kubota and Y. Kimura; "straight-line soliton data transmision over 2000km at 20 Gbit/s and 1000 km at 40 Gbit/s using erbium-doped fibre amplifiers," Electron. Lett. Vol. 29, No. 16, pp. 1474-1475, 1993.

59.  M. Nakazawa, K. Suzuki, H. Kubota and Y. Kimura; "Active Q switching and mode locking in a 1.53-ｵm fiber ring laser with saturable absorption in erbium-doped fiber at 4.2 K," Opt. Lett. Vol. 18, No. 18, pp. 1526-1528, 1993.

60.  M. Nakazawa, K. Suzuki, H. Kubota and Y. Kimura; "Self-Q-switching and mode locking in a 1.53-ｵm fiber ring laser with saturable absorption in erbium-doped fiber at 4.2 K," Opt. Lett. Vol. 18, No. 8, pp. 613-615, 1993.

61.  M. Nakazawa and H. Kubota; "Physical interpretation of reduction of soliton interaction force by bandwidth limited amplification," Electron. Lett. Vol. 28, No. 10, pp. 958-960, 1992.

62.  K. Kurokawa, H. Kubota and M. Nakazawa; "Significant modification of femtosecond soliton interaction in gain medium by small subpulse," Electron. Lett. Vol. 28, No. 25, pp. 2334-2335, 1992.

63.  K. Kurokawa, H. Kubota and M. Nakazawa; "Soliton self-frequency shift accelerated by femtosecond soliton interaction," Electron. Lett. Vol. 28, No. 22, pp. 2052-2053, 1992.

64.  M. Nakazawa, K. Suzuki, E. Yamada, H. Kubota and Y. Kimura; ""10 Gbit/s, 1200 km error-free soliton data transmission using erbium-doped fibre amplifiers"," Electron. Lett. Vol. 28, No. 9, pp. 817-818, 1992.

65.  鈴木　和宣, 久保田　寛和 and 中沢　正隆; "エルビウム光ファイバー増幅器を用いたソリトン通信," レーザー研究 Vol. 20, No. 8, pp. 666-672, 1992.

66.  M. Nakazawa, K. Suzuki, Y. Kimura and H. Kubota; "Coherent pi-pulse propagation with pulse breakup in an erbium-doped fiber waveguide amplifier," Phys. Rev. A Vol. 45, No. 5, pp. 2682-2685, 1992.

67.  M. Nakazawa, H. Kubota, E. Yamada and K. Suzuki; "Infinite-distance soliton transmission with soliton controls in time nad frequency domains," Electron. Lett. Vol. 28, No. 2, pp. 1099-1100, 1992.

68.  H. Kubota and M. Nakazawa; "Partial soliton communication system," Opt. Commun Vol. 87, No. "1,2", pp. 15-18, 1992.

69.  M. Nakazawa, E. Yamada, H. Kubota and K. Suzuki; "10 Gbit/s soliton data transmission over one million kilometers," Electron. Lett. Vol. 27, No. 14, pp. 1270-1272, 1991.

70.  M. Nakazawa, H. Kubota, K. Kurokawa and E. Yamada; "Femtosecond optical soliton transmission over long distances using adiabatic trapping and soliton standardization," J. Opt. Soc. Am. B Vol. 8, No. 9, pp. 1811-1817, 1991.

71.  M. Nakazawa, K. Suzuki, E. Yamada and H. Kubota; "Observation of nonlinear interaction in 20 Gbot/s soliotn transmission over 500 km using erbium-doped fibre amplifiers," Electron. Lett. Vol. 27, No. 18, pp. 1662-1663, 1991.

72.  H. Kubota and M. Nakazawa; "Recent progress on optical soliton communication," IEICE Trans. Vol. E74, No. 6, pp. 1373-1378, 1991.

73.  M. Nakazawa, E. Yamada and H. Kubota; "Coexistence of a self-induced transparency soliton and a nonlinear Schrodinger soliton," Phys. Rev. Lett. Vol. 66, No. 20, pp. 2625-2628, 1991.

74.  M. Nakazawa, E. Yamada and H. Kubota; "Coexistence of a self-induced transparency soliton and a nonlinear Schrodinger soliton in an erbium-doped fiber," Phys. Rev. A Vol. 44, No. 9, pp. 5973-5987, 1991.

75.  M. Nakazawa, K. Suzuki, H. Kubota, E. Yamada and Y. Kimura; "Dynamic optical soliton communicaiton," IEEE J. Quantum. Electron. Vol. 26, No. 12, pp. 2095-2102, 1990.

76.  M. Nakazawa, K. Kurokawa, H. Kubota, K. Suzuki and Y. Kimura; "Femtosecond erbium-doped fiber amplifier," Appl. Phys. Lett. Vol. 57, No. 7, pp. 653-655, 1990.

77.  H. Kubota and M. Nakazawa; "Maximum transmisison capacity of a soliton communication system with lumped amplifiers," Electron. Lett. Vol. 26, No. 18, pp. 1454-1455, 1990.

78.  M. Nakazawa, K. Kurokawa, H. Kubota and E. Yamada; "Observation of the trapping of sn optical soliton by adiabatic narrowing and its escape," Phys. Rev. Lett. Vol. 65, No. 15, pp. 1881-1884, 1990.

79.  H. Kubota and M. Nakazawa; "Long-distance soliton transmission with lumped amplifiers," IEEE J. Quantum. Electron. Vol. 26, No. 4, pp. 692-700, 1990.

80.  M. Nakazawa, K. Suzuki, H. Kubota and H. A. Haus; "High-order solitons and the modulational instability," Phys. Rev. A Vol. 39, No. 11, pp. 5768-5776, 1989.

81.  M. Nakazawa, K. Suzuki, H. Kubota and H. A. Haus; "The modulational instability laser - Part II: Theory," IEEE J. Quantum. Electron. Vol. 25, No. 9, pp. 2045-2052, 1989.

82.  M. Nakazawa, Y. Kimura, K. Suzuki and H. Kubota; "Wavelength multiple soliton amplification and transmission with Er3+-doped optical fiber," J. Appl. Phys. Vol. 66, No. 7, pp. 2803-2812, 1989.

83.  K. Kurokawa, H. Kubota and M. Nakazawa; ""Generation of 72-fs pulse from a cavity dumped, synchronously pumped dye laser with a single jet"," Opt. Commun. Vol. 73, No. 4, pp. 319-321, 1989.

84.  H. Kubota and M. Nakazawa; "Study of optical pulse compression with higher order nonlinearity and dispersion," Jpn. J Appl. Phys. Vol. 28, No. 4, pp. 609-614, 1989.

85.  H. Kubota, K. Kurokawa and M. Nakazawa; "29-fsec pulse generation from a linear-cavity synchronously pumped dye laser," Opt. Lett. Vol. 13, No. 9, pp. 749-751, 1988.

86.  K. Kurokawa, H. Kubota and M. Nakazawa; ""48 fs, 190 kW pulse generation from a cavity dumped, synchronously pumped dye laser"," Opt. Commun. Vol. 68, No. 4, pp. 287-290, 1988.

87.  H. Kubota and M. Nakazawa; "Compensation of nonlinear chirp generated by self-steepening using third order dispersion of a grating pair," Opt. Commun. Vol. 66, No. "2,3", pp. 79-82, 1988.

88.  M. Nakazawa, T. Nakashima, H. Kubota and S. Seikai; "Efficient optical pulse compression using a pair of Brewster-angled TeO2 crystal prisms," J. Opt. Soc. Am. B Vol. 5, No. 2, pp. 215-221, 1988.

89.  M. Nakazawa, T. Nakashima and H. Kubota; "Optical pilse compression using a TiO2 acousto-optical light deflector," Opt. Lett. Vol. 13, No. 2, pp. 120-122, 1988.

90.  M. Nakazawa, T. Nakashima, H. Kubota and S. Seikai; ""55 kW, 240 fs pulse generation from a cavity dumped, synchronously pumped dye laser and its application to pulse compression"," Appl. Phys. Lett. Vol. 51, No. 10, pp. 728-730, 1987.

91.  T. Nakashima, M. Nakazawa, K. Nishi and H. Kubota; "Effect of stimulated Raman scattering on pulse-compression characteristics," Opt. Lett. Vol. 12, No. 6, pp. 404-406, 1987.

92.  M. Nakazawa, T. Nakashima, H. Kubota and S. Seikai; "65-femtosecond pulse generation from a synchronously pumped dye laser without a colliding-pulse mode-locking technique," Opt. Lett. Vol. 12, pp. 681-683, 1987.