OPTICAL FIBER AMPLIFIER AND DISPERSION COMPENSATION FIBER MODULE FOR OPTICAL FIBER AMPLIFIER

Japanese Patent JP3859256

B2

PROBLEM TO BE SOLVED: To improve the conversion efficiency of an optical fiber amplifier by efficiently utilizing residual exciting light power generated at the time of increasing an average excitation rate while assuring the stable operation of an exciting light source.
SOLUTION: The exciting light is made incident on the optical fiber amplifier provided with a rare earth doped fiber 1 from one end of this rare earth doped fiber 1 by a first optical coupler 3-1. The residual exciting light arriving at the other end of the rare earth doped fiber 1 is separated by a second optical coupler 3-2 as a result of the incidence of the exciting light from the one end of the rare earth doped fiber 1. In addition, the residual exciting light is reflected by a reflecting means 4 and is returned into the rare earth doped fiber 1. The unstable operation that the exciting light source 2 for the exciting light incident on the rare earth doped fiber 1 makes by the residual exciting light returned into the rare earth doped fiber 1 is prevented by using an optical isolating means 5.

Susumu Kinoshita

JP5067996A

December 20, 2006

March 07, 1996

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富士通株式会社

G02F1/35; H01S3/10; H01S3/06; H01S3/067; H01S3/07; H01S3/23; H01S3/30; H04B10/07; H04B10/2537; H04B10/2543; H04B10/29; H04B10/294; H04J14/00; H04J14/02; (IPC1-7): G02F1/35; H01S3/07

JP3025985A
JP3135081A
JP5142595A
JP3166782A
JP4144177A
JP8262511A

J. Wagner et al.,An Intra-Cavity Fiber Frequency Shifter, Phase Conjugator,OPTICAL FIBER COMMUNICATION 95 Technical Digest,1995年 2月26日,Vol. 8,351-353頁
I.N. Duling III et al.,Single-polarisation fibre amplifier,Electronics Letters,1992年,Vol. 28 No. 12,1126-1128頁

Yu Sanada

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