Lab.abstract

Study on Long-Haul and High-Speed Optical Transmission Systems and Ultra High-Speed Optical Signal Processing

<Japanese version is here.

Optical Pulse Propagation in a Dispersion-Managed Line and Discovery of Bisoliton
All-Optical Signal Processing Based on Fiber Nonlinearity
Ultra High-Speed Network Using Optical Solitons

Optical Pulse Propagation in a Dispersion-Managed Line and Discovery of Bisoliton
Dispersion-management, in which fiber's own properties such as group-velocity (GVD) and nonlinearity are intentionally changed along the line, is an indispensable technique to achieve high-speed and long-haul optical transmission. Dispersion-managed(DM) soliton is a stationary pulse propagating in a DM line. It is less influenced by Gordon-Haus timing jitter induced by optical amplifier noise thanks to low average dispersion. In WDM transmission systems, interchannel FWM and/or XPM caused by collisions between DM solitons in different channels are suppressed due to large local dispersion. In addition, DM soliton has larger peak power than the ideal soliton under the same averaged dispersion, thereby the SN ratio is improved. We have studied the characteristics of a DM soliton and its propagating behavior. In 2001, we firstly discovered the bisoliton which is a periodically stationary pulse having two main lobes. Now, we are studying the characteristics of the bisoliton.

Members
Akihiro Maruta, Associate Prof.
D2 Mao Xuesong, Mr.
M1 Hiroshi Asao, Mr.

Collaborator
Yuji Kodama, Prof.

Graduates
2005,3 M.E. Takashi Sawada（NTT）
2004,3 M.E. Takuya Tsujita（Fujitsu Ten）
2003,3 M.E. Shigeyuki Yamanaka（SHARP）
2003,3 M.E. Yasuhiro Yoshika（Fujitsu）
2002,3 Ph.D. Takashi Inoue（Furukawa Electric）
2001,3 M.E. Yasumichi Nonaka（Hitachi）
2000,3 Ph.D. Vincent Cautaerts
2000,3 Ph.D Hiroto Sugahara（NEC）
1999,3 M.E. Kodai Kato (NTT)
1998,3 Ph.D Takao Okamawari(Japan Telecom)

Publications
Technical Report
[1] A. Hasegawa, Y. Kodama, and A. Maruta, ``Recent Progress in Dispersion-Managed Soliton Transmission Technoligies,'' Opt. Fiber Technol., Vol.3, pp.197-213 (1997).
Interaction between Guiding Centre Solitons
[1] T. Okamawari, Y. Ueda, A. Maruta, Y. Kodama, and A. Hasegawa, ``Interaction between guiding centre solitons in a periodically dispersion compensated optical transmission line,'' Electron. Lett., Vol.33, No.12, pp.1063-1065 (June 1997).
Optimal Design of Dispersion Management for a Soliton-Wavelength-Division-Multiplexed System
[1] Y. Kodama and A. Maruta, ``Optimal design of dispersion management for a soliton-wavelength-division-multiplexed system,'' Opt. Lett., Vol.22, No.22, pp.1692-1694 (Nov. 1997).
[2] H. Sugahara, H. Kato, and Y. Kodama, ``Maximum reduction of collision induced frequency shift in soliton WDM systems with dispersion compensation,'' Electron. Lett., Vol.33, No.12, pp.1065-1065 (June 1997).
[3] H. Sugahara, T. Inoue, A. Maruta, and Y. Kodama, ``Optimal dispersion management for wavelength-division-multiplexed RZ optical pulse transmission,'' Electron. Lett., Vol.34, No.9, pp.902-904 (April 1998).
[4] H. Sugahara, A. Maruta, and Y. Kodama, ``Optimal allocation of amplifiers in a dispersion managed line for wavelength-division-multiplexed soliton transmission system,'' Opt. Lett., Vol.24, No.3, pp.145-147 (Feb. 1999).
[5] H. Sugahara, H. Kato, T. Inoue, A. Maruta, and Y. Kodama, ``Optimal dispersion management for a wavelength-division-multiplexed optical soliton transmission system,'' IEEE/OSA J. Lightwave Technol., Vol.17, No.9, pp.1547-1559 (Sept. 1999).
[6] H. Sugahara and A. Maruta, ``Collision induced timing jitter analysis in a wavelength-division-multiplexed optical soliton transmission system with dispersion management,'' J. Opt. Soc. Am B, Vol.18, No.4, pp.419-431 (April 2001).
Reduction of Gordon-Haus Jitter in a Dispersion Compensated Optical Transmission System
[1] T. Okamawari, A. Maruta, and Y. Kodama, ``Analysis of Gordon-Haus jitter in a dispersion compensated optical transmission system,'' Opt. Lett., Vol.23, No.9, pp.694-696 (May 1998).
[2] T. Okamawari, A. Maruta, and Y. Kodama, ``Reduction of Gordon-Haus jitter in a dispersion compensated optical transmission system : analysis,'' Opt. Commun., Vol.149, No.4-6, pp.261-266 (April 1998).
Interaction of Dispersion Managed Solitons
[1] T. Inoue, H. Sugahara, A. Maruta, and Y. Kodama, ``Interaction of dispersion managed solitons in OTDM system,'' IEEE Photon. Technol. Lett., Vol.12, No.3, pp.299-301 (March 2000).
Discovery of Bisoliton
[1] A. Maruta, Y. Nonaka, and T. Inoue, ``Symmetric Bi-Soliton Solution in a Dispersion-Managed System,'' Topical Meeting on Nonlinear Guided Waves and Their Applications 2001(NLGW2001), Clearwater, Florida, Paper PD(Post Deadline)-4 (March 2001).
[2] A. Maruta, T. Inoue, Y. Nonaka and Y. Yoshika, ``Bisoliton Propagating in Dispersion-Managed System and Its Application to High-Speed and Long-Haul Optical Transmission,'' IEEE J. Select. Topics. Quantum Electron., vol. 8, no. 3, pp. 640-650, May-June 2002.
[3] A. Maruta, ``Parameter range of Bi-soliton propagating in dispersion-managed system,'' The European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference (CLEO/Europe-EQEC 2003), Munich, Germany, Paper CJ1M (23rd, June 2003).
[4] A. Maruta, ``Dispersion managed solitons and their applications to high speed transmission technologies (invited),'' The 2nd International Conference on the Optical Internet / The 28th Australian Conference on Optical Fibre Technology (COIN2003/ACOFT2003), Melbourne, Victoria, Australia, Paper TuC1-1 (15, July 2003).
[5] X. Mao and A. Maruta, ``Bi-soliton propagation in dispersion-managed line under the influence of third-order dispersion,'' The 8th Optoelectronics and Communications Conference (OECC 2003), Shanghai, P. R. China, Paper P4-5 (8-11, July 2003, postponed to 13-16, Oct. 2003).
[6] X. Mao and A. Maruta, ``Third-order dispersion induced Temporal shift of Bi-soliton propagating in dispersion-managed optical fiber transmission system,'' The 9th Optoelectronics and Communications Conference (OECC 2004), Yokohama, Japan, Paper 16A1-5 (12-16th July 2004)
[7] A. Maruta, ``Controllability of Solitons Propagating in Optical Fiber Transmission System (invited),'' The 10th Symposium on Large Scale Systems : Theory and Applications (LSS04), Osaka, Japan, Paper INV9-5 (26-28, July 2004).

All-Optical Singal Processing Based on Fiber Nonlinearity

The Kerr effect in an optical fiber, Fiber Nonlinearity, provides us various nonlinear functions for ultrafast all-optical signal processing, such as wavelength conversion, signal regeneration, demultiplexing of optical time division multiplexed (OTDM) signal, and so on, thanks to inherent ultrafast response time (a few femtoseconds). We attempt to realize an all-optical analog-to-digital conversion (ADC) and digital-to-analog conversion (DAC) using fiber nonlinearity, especially, soliton effect, supercontinuum (SC) generation and optical parametric amplification (OPA). We propose several schemes for all-optical ADCs and DACs and verify the feasibility of the schemes by numerical simulations and experiments.

Members
Ken-ichi Kitayama, Prof.
Akihiro Maruta, Associate Prof.
D3 Shoichiro Oda, Mr.
M2 Atsushi Maeda, Mr.
M1 Motomine Kannan, Mr.
B4 Takashi Kunihiro, Mr.

Graduates
2005,3 M.E. Xulong Mao（Fujitsu)
2002,3 M.E. Yoshinori Yamamoto（Sumitomo Electric）

Publications
All-Optical ADC Based on Soliton Phenomena
[1] S. Oda, A. Maruta, and K. Kitayama, ``All-Optical Quantization Based on Fiber Nonlinearity,'' IEEE Photon. Technol. Lett., vol.16, pp.587-589, Feb. 2004
[2] S. Oda, X. Mao, A. Maruta, and K. Kitayama, ``All-Optical Analog-to-Digital Conversion Based on Fiber Nonlinearity,'' IEICE Trans. Commun. vol.J87-B, No.2, pp.116-124, Feb. 2004. (in Japanese)
All-Optical ADC by slicing supercontinuum spectrum and switching with nonlinear optical loop mirror
[3]S. Oda and A. Maruta,"A Novel Quantization Scheme by Slicing Supercontinuum Spectrum for All-Optical Analog-to-Digital Conversion," IEEE Photon. Technol. Lett., vol.17, pp.465-467, Feb. 2005
[4]S. Oda and A. Maruta, "2-bit all-optical analog-to-digital conversion by slicing supercontinuum spectrum and switching with nonlinear optical loop mirror and its application to quaternary ASK-to-OOK modulation format converter," IEICE Trans. on Commun., vol. E88-B, pp. 1963-1969, May 2005.

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Study on Long-Haul and High-Speed Optical Transmission Systems and Ultra High-Speed Optical Signal Processing

Optical Pulse Propagation in a Dispersion-Managed Line and Discovery of Bisoliton

All-Optical Signal Processing Based on Fiber Nonlinearity

Ultra High-Speed Network Using Optical Solitons

Members

Collaborator

Graduates

Publications

All-Optical Singal Processing Based on Fiber Nonlinearity

Members

Graduates

Publications