Conference Presentations

1. T. Hirooka and A. Hasegawa, ``Demultiplexing in wavelength division multiplexed soliton transmission systems (Invited Presentation),'' The Pacific Conference on Lasers and Electro-Optics (CLEO/Pacific Rim '97), Chiba, Japan, WJ1, July 1997.

2. T. Hirooka and A. Hasegawa, ``Wavelength division multiplexing with quasi soliton systems,'' Conference on Optical Fiber Communications (OFC '98), San Jose, CA, ThI1, Feb. 1998.

3. T. Hirooka, T. Nakada, A. H. Liang, and A. Hasegawa, ``160 Gb/s soliton transmission in a densely dispersion-managed fiber in the presence of variable dispersion and polarization-mode dispersion,'' Nonlinear Guided Waves and Their Applications (NLGW '99), Dijon, France, ThA2, Sep. 1999.

4. M. J. Ablowitz and T. Hirooka, ``Resonant intrachannel four-wave mixing in strongly dispersion-managed transmission systems,'' Conference on Optical Fiber Communications (OFC 2001), Anaheim, CA, WDD33, March 2001.

5. M. J. Ablowitz, T. Hirooka, G. Biondini, and W. L. Kath, ``Quasi-linear optical pulses in strongly dispersion-managed transmission systems,'' Nonlinear Guided Waves and Their Applications (NLGW 2001), Clearwater, FL, MC76, March 2001.

6. T. Hirooka and M. J. Ablowitz, ``Managing nonlinearity in strongly dispersion managed optical pulse transmission,�h Nonlinear Optics (NLO 2002), Wailea, Hawaii, WE1, July 2002.

7. T. Hirooka and M. J. Ablowitz, ``Timing and amplitude jitter due to intra-channel dispersion-managed pulse interactions,�h Nonlinear Guided Waves and their Applications (NLGW 2002), Stresa, Italy, NLMD54, Sep. 2002.

8. M. Nakazawa, T. Hirooka, F. Futami, and S. Watanabe, ``Ideal distortion-free transmission using optical Fourier transformation and transform-limited ultrashort pulses,�h European Conference on Optical Communication (ECOC 2003), Rimini, Italy, Postdeadline paper Th4.3.8, Sep. 2003.

9. T. Hirooka, S. Ono, K. Hagiuda, and M. Nakazawa, �gStimulated Brillouin scattering in ultrahigh-speed femtosecond soliton compression with a dispersion-decreasing fiber,�h International Conference on Ultrafast Phenomena (UP 2004), Niigata, Japan, TuE38, July 2004.

10. T. Hirooka, M. Nakazawa, F. Futami, and S. Watanabe, �gNew adaptive equalization scheme for 160 Gb/s transmitted signal using time-domain optical Fourier transformation,�h European Conference on Optical Communication (ECOC 2004), Stockholm, Sweden, Th1.5.3, Sep. 2004.

11. K. Hagiuda, T. Hirooka, S. Ono, M. Yoshida, M. Nakazawa, S. Arahira, and Y. Ogawa, �gGeneration of a 40-GHz, 100-fs pulse train from a mode-locked laser diode using DDF soliton compression,�h European Conference on Optical Communication (ECOC 2004), Stockholm, Sweden, Tu3.3.2, Sep. 2004.

12. T. Hirooka and M. Nakazawa, �gUltrahigh-speed distortion-free transmission using all-optical time-domain Fourier transformation,�h International Conference on Quantum Electronics and the Pacific Rim Conference on Lasers and Electro-Optics (IQEC/CLEO-PR 2005), Tokyo, Japan, Invited paper, CFJ3-4-INV, July (2005).

13. H. Hasegawa, M. Kikegawa , M. Yoshida, T. Hirooka, and M. Nakazawa, �gObservation of optimum air-hole tapering of splicing between a conventional fiber and a photonic crystal fiber and analysis of reduction of Fresnel reflection,�h International Conference on Quantum Electronics and the Pacific Rim Conference on Lasers and Electro-Optics (IQEC/CLEO-PR 2005), Tokyo, Japan, CWE2-1, July (2005).

14. Y. Oikawa, H. Hasegawa, M. Yoshida, T. Hirooka, and M. Nakazawa, �gUltra-broadband Dispersion Measurement of a Photonic Crystal Fiber with Pico-second Streak Camera and Group-delay-free Supercontinuum,�h International Conference on Quantum Electronics and the Pacific Rim Conference on Lasers and Electro-Optics (IQEC/CLEO-PR 2005), Tokyo, Japan, CWE2-4, July (2005).

15. H. Hasegawa, T. Hirooka and M. Nakazawa, �gA new method for optimum dispersion designing of zero-dispersion and dispersion-flattened photonic crystal fibers,�h International Conference on Quantum Electronics and the Pacific Rim Conference on Lasers and Electro-Optics (IQEC/CLEO-PR 2005), Tokyo, Japan, CWE2-6, July (2005).

16. K. Osawa, K. Haneda, T. Hirooka, M. Yoshida, W. Suttawassuntorn and M. Nakazawa, �gMeasurement of optical carrier spectrum deformation in high-speed pulse transmission,�h International Conference on Quantum Electronics and the Pacific Rim Conference on Lasers and Electro-Optics (IQEC/CLEO-PR 2005), Tokyo, Japan, CFJ3-3, July (2005).

17. T. Hirooka and M. Nakazawa, �gDerivation of analytical expression for third-order dispersion elimination using time-domain optical Fourier transformation,�h European Conference on Optical Communication (ECOC 2005), Glasgow, Scotland, We4.P.76, Sep. (2005).

18. M. Nakazawa, S. Nakahara, T. Hirooka, M. Yoshida, T. Kaino, and K. Komatsu, �gPolymer saturable absorber materials in 1.5 mm band using PMMA and PS with single-wall carbon nanotubes,�h Conference on Optical Fiber Communications (OFC 2006), Anaheim, CA, OThQ4, March (2006).

19. H. Hasegawa, Y. Oikawa, T. Hirooka, M. Yoshida, and M. Nakazawa, �g10 Gb/s transmission over 3 km at 850 nm using single-mode photonic crystal fiber, single-mode VCSEL, and Si-APD,�h Conference on Optical Fiber Communications (OFC 2006), Anaheim CA, JThB4, March (2006).

20. T. Hirooka, K. Hagiuda, T. Kumakura, K. Osawa, and M. Nakazawa, �g160 Gbit/s-600 km OTDM transmission using time-domain optical Fourier transformation,�h European Conference on Optical Communication (ECOC 2006), Tu1.5.4, September (2006).

21. H. Hasegawa, Y. Oikawa, T. Hirooka, M. Yoshida, K. Suzuki, Y. Inoue, and M. Nakazawa, �g10 Gb/s x 4 channel WDM transmission over 3 km in the 800 nm region using photonic crystal fibers,�h European Conference on Optical Communication (ECOC 2006), We4.5.4, September (2006).

22. T. Hirooka, T. Kumakura, K. Osawa, and M. Nakazawa, �gComparison of 40 GHz optical demultiplexers using SMZ switch and EA modulator in 160 Gbit/s-500 km OTDM transmission,�h EOS Annual Meeting 2006, TOM2, October (2006).

23. T. Hirooka and M. Nakazawa, �gUltrahigh-speed signal transmission / processing technologies,�h Optoelectronics and Communications Conference (OECC2007), Invited paper, 10B2-1, July (2007).

24. K. Osawa, M. Okazaki, T. Hirooka, and M. Nakazawa, �gLow power-penalty 160 Gbit/s DPSK transmission over 600 km,�h Optoelectronics and Communications Conference (OECC2007), 10B2-2, July (2007).

25. H. Hasegawa, Y. Oikawa, T. Hirooka, and M. Nakazawa, �g40 Gbit/s-2 km photonic crystal fiber transmission with a single-mode VCSEL,�h Optoelectronics and Communications Conference (OECC2007), 11P-8, July (2007).

26. M. Nakazawa and T. Hirooka, �gTerabit OTDM transmission-Key challenges,�h IEEE/LEOS Summer Topicals 2007, Invited paper, ME3.3, July (2007).

27. T. Hirooka, M. Okazaki, K. Osawa, and M. Nakazawa, �g160 Gbit/s-900 km DPSK transmission with time-domain optical Fourier transformation,�h European Conference on Optical Communication (ECOC2007), 1.3.3, September (2007).

28. T. Hirooka, K. Osawa, M. Okazaki, M. Nakazawa, and H. Murai, �gObservation of stimulated Brillouin scattering in ultrahigh-speed in-phase and carrier-suppressed RZ OTDM transmission,�h European Conference on Optical Communication (ECOC2007), September (2007).

29. T. Hirooka, M. Nakazawa, and K. Okamoto, �g40 GHz bright and dark parabolic pulse generation using a picosecond optical pulse source and a 64-channel AWG,�h Optical Fiber Communication Conference (OFC2008), OTuC6, February (2008).

30. T. Hirooka and M. Nakazawa, �gAll-optical 40 GHz time-domain Fourier transformation using XPM with a dark parabolic pulse,�h Optical Fiber Communication Conference (OFC2008), OThG5, February (2008).

31. T. Hirooka, M. Okazaki, P. Guan, and M. Nakazawa, �g320 Gbit/s single-polarization DPSK transmission over 525 km using time-domain optical Fourier transformation,�h European Conference on Optical Communication (ECOC 2008), We2.E.6, September (2008).

32. M. Okazaki, P. Guan, T. Hirooka, M. Nakazawa, and T. Miyazaki, �g160 Gbit/s-200 km field transmission experiment using a time-domain optical Fourier transformation technique with a large PMD,�h European Conference on Optical Communication (ECOC 2008), P.4.12, September (2008).

33. M. Yoshida, I. Kashiwamura, T. Hirooka, and M. Nakazawa, �gDelivery of an ultrastable Cs optical atomic clock using a JGN II optical test bed�h Conference on Lasers and Electro Optics (CLEO 2009), CTuS3, May (2009).

34. T. Hirooka and M. Nakazawa, �gUltrafast transmission technology using time-domain optical Fourier transformation,�h IEEE/LEOS Summer Topicals 2009, Invited paper, MC2.4, July (2009).

35. T. Hirooka, M. Okazaki, T. Hirano, P. Guan, M. Nakazawa, and S. Nakamura, �gAll-optical demultiplexing of 640 Gbit/s OTDM-DPSK signal using a semiconductor SMZ switch,�h European Conference on Optical Communication (ECOC 2009), 4.3.2, September (2009).

36. P. Guan, M. Okazaki, T. Hirano, T. Hirooka, and M. Nakazawa, �gLow-penalty 5x320 Gbit/s (1.6 Tbit/s) WDM DPSK transmission over 525 km using time-domain optical Fourier transformation,�h European Conference on Optical Communication (ECOC 2009), 6.4.4, September (2009).

37. K. Kasai, T. Omiya, P. Guan, M. Yoshida, T. Hirooka, and M. Nakazawa, �gSingle-Channel 400 Gbit/s, OTDM-32 RZ/QAM Coherent Transmission over 225 km Using an Optical Phase-Locked Loop Technique,�h Optical Fiber Communication Conference (OFC 2010), OThD6, March (2010).

38. T. Hirano, P. Guan, T. Hirooka, and M. Nakazawa, �g640 Gbit/s Single-Polarization DPSK Transmission over 525 km with Time-Domain Optical Fourier Transformation in a Round-Trip Configuration,�h Optical Fiber Communication Conference (OFC 2010), OThD7, March (2010).

39. K. Koizumi, M. Yoshida, T. Hirooka, and M. Nakazawa, �g10 Gbit/s Photonic Crystal Fiber Transmissions with 1.1 ƒÊm Directly-Modulated Single-Mode VCSEL,�h Optical Fiber Communication Conference (OFC 2010), OWK3, March (2010).

40. T. Hirooka, �gRecent Progress on OTDM Terabit/s Transmission and Their Future,�h Tutorial talk, Optical Fiber Communication Conference (OFC 2010), OWM5, March (2010).

41. H. C. Hansen Mulvad, P. Guan, K. Kasai, T. Hirooka, and M. Nakazawa, �gHigh-Resolution 640 Gbit/s Clock Recovery using Time-Domain Optical Fourier Transformation and Narrowband Optical Filter,�h European Conference on Optical Communication (ECOC 2010), Mo.1.A.6, September (2010).

42. P. Guan, H. C. Hansen Mulvad, Y. Tomiyama, T. Hirano, T. Hirooka, and M. Nakazawa, �g1.28 Tbit/s/channel Single-polarization DQPSK Transmission over 525 km Using Ultrafast Time-domain Optical Fourier Transformation,�h European Conference on Optical Communication (ECOC 2010), We.6.C.3, September (2010).

43. T. Hirooka and M. Nakazawa, �gRecent progress on ultra-high speed and multi level coherent transmission,�h Photonics 2010, Invited talk, M2B3, December (2010).

44. T. Hirooka, T. Hirano, P. Guan, M. Nakazawa, �gNew PMD-Induced Crosstalk in the Presence of PDL in a Polarization-Multiplexed Ultrahigh-Speed Transmission,�h Optical Fiber Communication Conference (OFC 2011), JThA44, March (2011).

45. K. Koizumi, M. Yoshida, T. Hirooka, and M. Nakazawa, �gA 10 GHz 2.5 ps regeneratively mode-locked Yb fiber laser in the 1.1 ƒÊm band,�h Conference on Lasers and Electro-Optics (CLEO 2011), CMBB3, May (2011).

46. T. Hirooka, K. Kasai, and M. Nakazawa, �gRecent Progress on Ultra-high Speed and Multi Level Coherent Transmission,�h Korea-Japan Workshop on Beyond 100G, Invited Talk, ThD4, June (2011).

47. M. Nakazawa, K. Kasai, M. Yoshida, and T. Hirooka, �gNovel RZ-CW Conversion Scheme for Ultra Multi-level, High-speed Coherent OTDM Transmission,�h European Conference on Optical Communication (ECOC2011), We.10.P1,75, September (2011).

48. P. Guan, T. Hirano, K. Harako, Y. Tomiyama, T. Hirooka, and M. Nakazawa, �g2.56 Tbit/s/ch Polarization-mutliplexed DQPSK Transmission over 300 km Using Time-domain optical Fourier Transformation,�h European Conference on Optical Communication (ECOC2011), We.10.P1,80, September (2011).

49. K. Koizumi, M. Yoshida, T. Hirooka, and M. Nakazawa, �g10 GHz, 1.1 ps pulse generation from a harmonically and regeneratively mode-locked Yb fiber laser at 1.1 ƒÊm,�h 17th Microoptics Conference (MOC�f11), H-22, Oct. (2011).

50. M. Nakazawa, M. Yoshida, and T. Hirooka, �gMeasurement of Mode Couplings along a Multi-Core Fiber Using a Multi-Channel OTDR,�h Optical Fiber Communication Conference (OFC2012), OTh3I.3, March (2012).

51. T. Hirooka, K. Harako, P. Guan, and M. Nakazawa, �gBandwidth and distance dependences of depolarization-induced crosstalk in polarization-multiplexed transmission,�h Optical Fiber Communication Conference (OFC2012), JW2A.44, March (2012).

52. T. Yajima, J. Yamamoto, F. Ishii, T. Hirooka, M. Yoshida, and M. Nakazawa, "Low Loss Photonic Crystal Fiber Fabricated by Slurry Casting Method," Conference on Lasers and Electro Optics (CLEO2012), CTh3G.1, May (2012).

53. D. Otuya, K. Kasai, T. Hirooka, M. Yoshida, M. Nakazawa, T. Hara, and S. Oikawa, �gA Single-Channel, 1.6 Tbit/s 32 QAM Coherent Pulse Transmission Over 150 km With RZ-CW Conversion and FDE Techniques,�h Optical Fiber Communication Conference (OFC2013), OTh4E.4, March (2013).

54. K. Harako, P. Ruan, T. Hirooka, and M. Nakazawa, �gLarge PMD Tolerant 1.28 Tbit/s/ch Transmission over 525 km with 640 Gbaud Optical Nyquist Pulses,�h Optical Fiber Communication Conference (OFC2013), JW2A.38, March (2013).

55. A. Fujisaki, K. Kasai, M. Yoshida, T. Hirooka, and M. Nakazawa, �gGeneration of 9 W, 4 kHz linewidth 13C2H2 frequency-stabilized fiber laser output with core pumped erbium-doped amplifier,�h Conference on Lasers and Electro-Optics (CLEO2013), CW3M.1, June (2013).

56. T. Sakano, H. Kubota, T. Komukai, T. Hirooka, and M. Nakazawa, �gResilient Photonic Network Architecture with Plug & play Optical Interconnection Technology,�h OECC 2013, TuQ3-5.

57. D. O. Otuya, K. Kasai, T. Hirooka, M. Yoshida, and M. Nakazawa, �gA Single-Channel 1.92 Tbit/s, 64 QAM Coherent Pulse OTDM Transmission over 150 km,�h OECC 2013, WR2-2.

58. K. Harako, T. Hirooka, and M. Nakazawa, �gMarked Reduction of Depolarization-Induced Crosstalk in Ultrahigh-Speed Pol-MUX Transmission with an Optical Nyquist Pulse,�h OECC 2013, WR4-5.

59. M. Yoshida, T. Hirooka, M. Nakazawa, �gMeasurement of Structural Irregularity Dependence on Mode Coupling along Multi-Core Fiber Using Multi-Channel OTDR System,�h IEEE Summer Topicals 2013, MC3.3.

60. T. Hirooka and M. Nakazawa, �gOrthogonal TDM Using Optical Nyquist Pulses,�h Signal Processing in Photonic Communications (SPPCom 2013), Invited talk, SPM1D.3.

61. T. Hirooka, M. Nakazawa, H. Kubota, T. Komukai, and T. Sakano, �gDynamic optical transport connection with a 100 Gbit/s digital coherent optical transponder for disaster-resilient networking,�h IEEE Region 10 Humanitarian Technology Conference (IEEE R10-HTC 2013), TS10-4, August (2013).

62. K Koizumi, T Hirooka, M Yoshida, and M Nakazawa, �gSingle-channel 1.28 Tbit/s Transmission over 58 km in the 1.1 ?m Band with Wideband GVD and Dispersion Slope Compensation,�h ECOC 2013, We.4.C.2.

63. M. Nakazawa, M. Yoshida, and T. Hirooka, �gNondestructive measurement of mode-coupling along a multi-core fiber using a synchronous multi-channel OTDR,�h EXAT 2013, pp. 60-63 (2013).

64. D. O. Otuya, K. Kasai, T. Hirooka, M. Yoshida, and M. Nakazawa, �g1.92 Tbit/s, 64 QAM coherent Nyquist pulse transmission over 150 km with a spectral efficiency of 7.5 bit/s/Hz,�h OFC 2014, W1A.4.

65. T. Hirooka, M. Nakazawa, T. Komukai, and T. Sakano, �g100 Gbit/s DP-QPSK transmission over a 32 km legacy multi-mode GI fiber using a real-time digital coherent transceiver,�h OFC 2014, W2A.1.

66. M. Nakazawa, M. Yoshida, and T. Hirooka, �gMeasurement of mode coupling distribution along a few-mode fiber using a synchronous multi-channel OTDR,�h OFC 2014, W3D.7.

67. D. Seya, K. Harako, T. Hirooka, and M. Nakazawa, �gAll-optical high-performance demultiplexing using optical Nyquist pulse sampling,�h OFC 2014, W4F.2.

68. K. Kasai, A. Fujisaki, M. Yoshida, T. Hirooka, M. Nakazawa, and S. Masuda, �gA 160 mW output, 5 kHz linewidth frequency-stabilized erbium silica fiber laser with a short cavity configuration,�h CLEO 2014, SW1N.4.

69. T. Hirooka, L. Chen, and M. Nakazawa, �gQ margin comparison of RZ and Nyquist optical pulses in ultrahigh-speed TDM transmission,�h OECC 2014, MO2B-3.

70. T. Yajima, J. Yamamoto, Y. Kinoshita, F. Ishii, T. Hirooka, M. Yoshida, and M. Nakazawa, �gOH-free, low loss single-mode fibre fabricated by slurry casting / rod-in-tube method,�h ECOC 2014, Th2.4.4.

71. M. Yoshida, T. Hirooka, K. Kasai, and M. Nakazawa, �gReal-time adaptive 4-64 QAM coherent optical transmission over 320 km with FPGA-based transmitter and receiver,�h ECOC 2014, Th.2.5.2.

72. K. Harako, D. O. Otuya, K. Kasai, T. Hirooka, and M. Nakazawa ,�h Novel ultrafast TDM demultiplexing scheme using orthogonality in coherent Nyquist pulses,�h ECOC 2014, Tu4.6.5.

73. D. O. Otuya, K. Harako, K. Kasai, T. Hirooka, and M. Nakazawa, �gA single-channel 960 Gbit/s 64 QAM orthogonal TDM transmission with a spectral efficiency of 10.0 bit/s/Hz using coherent Nyquist pulses,�h ECOC 2014, We.2.3.4.

74. M. Nakazawa, M. Yoshida, and T. Hirooka, �gA Single-channel 40 Gbit/s Digital Coherent QAM Quantum Stream Cipher Transmission over 480 km,�h ACP 2014, ATh4E.1, November (2014).

75. T. Sakano, T. Komukai, A. Takahara, T. Hirooka, and M. Nakazawa, �gAd-hoc photonic network based on movable and deployable ICT resource unit to meet rapidly changing service demands,�h OFC 2015, M2A.1.

76. D. O. Otuya, K. Harako, K. Kasai, T. Hirooka, and M. Nakazawa, �gSingle-channel 1.92 Tbit/s, 64 QAM coherent orthogonal TDM transmission of 160 Gbaud optical Nyquist pulses with 10.6 bit/s/Hz spectral efficiency,�h OFC 2015, M3G.2.

77. M. Yoshida, T. Hirooka, K. Kasai, and M. Nakazawa, �gReal-time 10 Gbit/s-16 QAM quantum stream cipher transmission over 320 km with FPGA-based transmitter and receiver,�h OFC 2015, W4F.4.

78. A. Fujisaki, M. Yoshida, T. Hirooka, and M. Nakazawa, �gGeneration of 10 W, 100 fs, 10 GHz pulse train using high power EDFA-MOPA system with cascaded Raman pumping,�h CLEO 2015, STh1L.7.