05506724 is referenced by 58 patents and cites 7 patents.

An optical fiber which amplifies an input signal by a pump source, a compensation-signal source which injects a compensation-signal propagating contra-directionally with respect to the input signal Into the optical fiber, a gain detector which measures a spontaneous emission light of the pump source at an input side of the optical fiber and a compensation-signal source controller which controls output of the compensation-signal source based on output of the gain detector are provided. In addition, a coupler and a wavelength selective reflector which reflects a light of the same wavelength as the compensation-signal selectively, are provided at the input side of the optical fiber.

Title
Gain controllable optical amplifier and applications thereof
Application Number
8/309921
Publication Number
5506724
Application Date
September 21, 1994
Publication Date
April 9, 1996
Inventor
Tadayoshi Kitayama
Kanagawa
JP
Kuniaki Motoshima
Kanagawa
JP
Takashi Mizuochi
Kanagawa
JP
Katsuhiro Shimizu
Kanagawa
JP
Agent
Wolf Greenfield & Sacks
Assignee
Mitsubishi Denki Kabushiki Kaisha
JP
IPC
H01S 3/00
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