Advanced transmission systems using distributed Raman amplification technologies

This paper introduces practical and high-performance transmission systems that employ distributed Raman amplification (DRA) technologies. The systems incorporate DRA/EDFA hybrid amplifiers as inline amplifiers with limited DRA pump powers. These powers are determined with respect to the practical safety and reliability of the systems against intense pump light. The practical aspects and merits of our systems are described both in detail and qualitatively. It is shown that a hybrid amplifier system using DSF performs better than one using SMF with limited pump powers. The use of DRA means that the optical SNR of the former system is typically about 2-3 dB higher than that of the latter. Moreover, this paper reports successful results of long-haul transmission field trials using the hybrid amplifier scheme in the L-band over installed DSF with an aggregate capacity of 1.28 Tbit/s (32 x 43 Gbit/s).

[1]  Kazuo Hagimoto,et al.  A 212 km NON-REPEATED TRANSMISSION EXPERIMENT AT 1.8 Gb/s USING LD PUMPED Er3+-DOPED FIBER AMPLIFIERS IN AN IM/DIRECT-DETECTION REPEATER SYSTEM , 1989 .

[2]  Hiroji Masuda,et al.  Optical SNR enhanced amplification in long-distance recirculating-loop WDM transmission experiment using 1580 nm band hybrid amplifier , 1999 .

[3]  Kazuhide Nakajima,et al.  Novel Optical Loss Design Method for WDM Systems , 2004 .

[4]  Hiroji Masuda,et al.  Super-dense WDM transmission technology in the zero-dispersion region employing distributed Raman amplification , 2003 .

[5]  N. Tsukiji Advances in diode laser pumps for Raman amplification , 2004, Optical Fiber Communication Conference, 2004. OFC 2004.

[6]  Tomoyoshi Kataoka,et al.  Transmission line with distributed erbium-doped fiber amplifier , 2001 .

[7]  Akira Naka,et al.  90 x 42.7 Gb/s (3.6 Tb/s) WDM signal transmission with triple band in-line amplifiers , 2004 .

[8]  J. Bromage,et al.  Reflection-induced penalty in Raman amplified systems , 2002, IEEE Photonics Technology Letters.

[9]  M. Tomizawa,et al.  High-performance distributed Raman amplification systems: practical aspects and field trial results , 2005, OFC/NFOEC Technical Digest. Optical Fiber Communication Conference, 2005..

[10]  J. Bromage,et al.  Raman amplification for fiber communications systems , 2003, Journal of Lightwave Technology.

[11]  Shingo Kawai,et al.  75-nm 3-dB gain-band optical amplification with erbium-doped fluoride fibre amplifiers and distributed Raman amplifiers in 9 × 2.5-Gb/s WDM transmission experiment , 1997 .

[12]  E. Desurvire Erbium-doped fiber amplifiers , 1994 .

[13]  Hiroji Masuda,et al.  Hybrid EDFA/Raman Amplifiers , 2004 .

[14]  Michael Y. Frankel,et al.  Harmonizing an opaque core network with transparent optical elements , 2004, SPIE Optics East.

[15]  A. Yariv Signal-to-noise considerations in fiber links with periodic or distributed optical amplification. , 1990, Optics letters.

[16]  Y. Shuto,et al.  Fiber fuse generation in single-mode fiber-optic connectors , 2004, IEEE Photonics Technology Letters.

[17]  S. Namiki,et al.  100 nm bandwidth flat gain Raman amplifiers pumped and gain-equalized by 12-wavelength-channel WDM high power laser diodes , 1999, OFC/IOOC . Technical Digest. Optical Fiber Communication Conference, 1999, and the International Conference on Integrated Optics and Optical Fiber Communication.

[18]  T. Ito Transmission of 1.6Tb/s (40/spl times/40 Gb/s) over 1,200km and three OADMs using 200-km SMF doubled-span with remotely pumped optical amplification , 2004, Optical Fiber Communication Conference, 2004. OFC 2004.

[19]  Ryo Nagase,et al.  Characteristics of fibre-optic connector at high-power optical incidence , 2002 .

[20]  Masahito Tomizawa,et al.  N × 40-Gbit/s DWDM Transport System Using Novel Return-to-Zero Formats with Modulation Bandwidth Reduction( Special Issue on 40 Gbit/s Optical Transmission Technologies) , 2002 .

[21]  Atsushi Takada,et al.  250 km nonrepeated transmission experiment at 1.8 Gb/s using LD pumped Er/sup 3+/-doped fibre amplifiers in IM/direct detection system , 1989 .

[22]  Ken-ichi Sato Advances in Transport Network Technologies: Photonic Networks, ATM, and SDH , 1996 .

[23]  N. S. Bergano,et al.  100 Gb/s (10/spl times/10 Gb/s) WDM transmission over 7200 km using distributed Raman amplification , 1997 .

[24]  Y. Miyamoto,et al.  WDM field demonstration of path provisioning by automatic dispersion compensation using tone modulated CS-RZ signal , 2003 .

[25]  N. A. Olsson,et al.  Erbium-Doped Fiber Amplifiers—Amplifier Basics , 1999 .

[26]  R.J.S. Pedersen,et al.  Improved noise performance in non-return to zero systems by use of distributed fibre amplifiers , 1996 .

[27]  Yutaka Miyamoto,et al.  Safety issues in high-power optical fibre communication systems, including distributed Raman amplification systems , 2003 .

[28]  Akira Hirano,et al.  First field trial using novel two-stage remotely-pumped EDF/distributedRaman hybrid inline amplifiers with 1.28-Tbit/s (32 x 43 Gbit/s) capacity over528-km (6 x 88 km) DSF in the L-band , 2003 .

[29]  A.A.M. Saleh Defining all-optical networking and assessing its benefits in metro, regional and backbone networks , 2003, OFC 2003 Optical Fiber Communications Conference, 2003..

[30]  Gerardo Castanon Performance requirements for semi-transparent DWDM networks , 2004 .

[31]  Y. Aoki,et al.  Fibre raman amplifier properties for applications to long-distance optical communications , 1989 .

[32]  H. Kawakami,et al.  10Gbit/s signal transmission in a 1600 km line employing distributed erbium-doped fiber to suppress the nonlinear effect , 1995 .

[33]  P. Winzer,et al.  Multiple Path Interference and Its Impact on System Design , 2004 .

[34]  M. W. Chbat,et al.  Raman amplification technology for bandwidth extension , 2001, LEOS 2001. 14th Annual Meeting of the IEEE Lasers and Electro-Optics Society (Cat. No.01CH37242).

[35]  K. Rottwitt,et al.  Pump interactions in a 100-nm bandwidth Raman amplifier , 1999, IEEE Photonics Technology Letters.

[36]  M. Islam Raman amplifiers for telecommunications , 2002 .