Title:
OPTICAL FIBER COMMUNICATION SYSTEM EQUIPPED WITH DISPERSIVE RAMAN AMPLIFIER AND REMOTE PUMP TYPE ERBIUM-DOPED FIBER AMPLIFIER
Document Type and Number:
Japanese Patent JP3640289
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To reduce multi-optical path interference in an optical fiber communication system.
SOLUTION: This optical fiber communication system is equipped with a remote pump type erbium-doped fiber amplifier(EDFA 24). Pump radiation is detuned with respect to wavelength, which is so selected that it is longer than both the optimum wavelength for pumping EDFA and the optimum wavelength for giving Raman gain to a transmission fiber (23). As a result of detuning such as this, multi-optical path interference is reduced, so that the total system performance is improved. For example, the wavelength of the pump radiation is within a range of 1490 to 1510 nm.
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Inventors:
Howard David Gidolph
Kenneth lee walker
Kenneth lee walker
Application Number:
JP23933598A
Publication Date:
April 20, 2005
Filing Date:
August 26, 1998
Export Citation:
Assignee:
Lucent Technologies, Inc.
Tyco Submarine Systems Limited
Tyco Submarine Systems Limited
International Classes:
G03F7/004; H01S3/10; G03F7/039; H01S3/06; H01S3/094; H01S3/23; H01S3/30; H04B10/17; (IPC1-7): H01S3/06
Domestic Patent References:
| JP9179152A |
Other References:
H.Masuda et al.,“Ultra-wideband optical amplification with 3dB bandwidth of 65nm using a gain equalised two-stage erbium-doped fibre amplifier and Raman amplification”,Electronics Letters,1997-4-24,Vol.33, No.9, p.753-754
Kazuo Aida et al.,“Long-span repeaterless IM/DD optical transmission experiment over 300Km using optical amplifiers”,ICC91,1991, Vol.3, p.1228-1232
K.Aida et al.,“Design and performance of a long-span IM/DD optical transmission system using remotely pumped optical amplifiers”,IEEE Proceedings J. Optoelectronic, 1990-8 Vol.137, No.4, p.225-229
Kazuo Aida et al.,“Long-span repeaterless IM/DD optical transmission experiment over 300Km using optical amplifiers”,ICC91,1991, Vol.3, p.1228-1232
K.Aida et al.,“Design and performance of a long-span IM/DD optical transmission system using remotely pumped optical amplifiers”,IEEE Proceedings J. Optoelectronic, 1990-8 Vol.137, No.4, p.225-229
Attorney, Agent or Firm:
Masao Okabe
Nobuaki Kato
Kazuo
Shinichi Usui
Ikuo Fujino
Takao Ochi
Teruhisa Motomiya
Norimichi Takanashi
Asahi Shinmitsu
Seiichiro Takahashi
Koji Yoshizawa
Nobuaki Kato
Kazuo
Shinichi Usui
Ikuo Fujino
Takao Ochi
Teruhisa Motomiya
Norimichi Takanashi
Asahi Shinmitsu
Seiichiro Takahashi
Koji Yoshizawa