Optical amplifier, optical amplifying method and optical transmi

Details Optical amplifier, optical amplifying method and optical transmi Optical amplifier, optical amplifying method and optical transmi

1998-11-03

1999-08-24

Hellner, Mark

Optical: systems and elements

Optical amplifier

Optical fiber

359134, H01S 300

Patent

active

059431628

ABSTRACT:
An optical amplifier including an input unit, a polarization maintaining optical amplifying unit, an exciting unit and an output unit. The input unit enables receiving a first signal light in a first polarization state and a second signal light in a second polarization state different from the first polarization state. The polarization maintaining optical amplifying unit includes a polarization maintaining optical amplifying medium enabling receiving the first and second signal lights with the first and second polarization states maintained as they are. The exciting unit provides first and second exiting lights having polarization states corresponding to the first and second lights, respectively, so that the polarization maintaining optical amplifying unit is capable of selectively amplifying the first and second signal lights, and the output unit enables receiving the first and second signal lights after being amplified by the polarization maintaining optical amplifying unit and outputting the amplified first and second signal lights to a transmission line.

REFERENCES:
patent: 5303314 (1994-04-01), Duling, III et al.
patent: 5589969 (1996-12-01), Taga et al.
patent: 5696615 (1997-12-01), Alexander
patent: 5835260 (1998-11-01), Kosaka et al.
"Er:Doped Fiber Amplifier for WDM Transmission Using Fiber Gain Control", Nakabayashi et al, Opto-Electronics Res. Labs., NEC Corporation, The Institute of Electronics Information and Communication Engineers, Technical Report of IEICE, 1994, pp. 31-47.

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