Optical amplifier

Details Optical amplifier Optical amplifier

2007-07-26

2009-10-27

Bolda, Eric (Department: 3663)

Optical: systems and elements

Optical amplifier

Optical fiber

C359S341410

Reexamination Certificate

active

07609438

ABSTRACT:
The present invention relates to an optical amplifier provided with a plurality of optically cascade-connected amplification units and also with a structure for enabling suppression of transient gain variations as a whole. Each of the plurality of amplification units in the optical amplifier has a pumping light source and an amplifying optical fiber, and at least one selected from the plurality of amplification units includes a timing adjustment system for temporally moving back or forth the variation timing of pumping light power accompanying the signal light power variation due to the variation of the number of signal channels, with respect to the variation timing of signal light power at a light incident end of the amplifying optical fiber contained in the own amplification unit.

REFERENCES:
patent: 6396625 (2002-05-01), Nakaji
patent: 6476961 (2002-11-01), Ye et al.
patent: 6678088 (2004-01-01), Stummer et al.
patent: 6687049 (2004-02-01), Sulhoff et al.
patent: 2002/0089738 (2002-07-01), Kanda
patent: 2001352297 (2001-12-01), None
Haruo Nakaji et al., High-Speed Automatically Gain Controlled EDFAs, Technical Report of IEICE, Nov. 2001, pp. 13-18, The Institute of Electronics, Information and Communication Engineers.
Haruo Nakaji et al., Dynamic Gain Excursion Suppression in High-Speed Automatically Gain Controlled EDFAs Using an Optical Delay Line, Optical Amplifiers and Their Applications, Jul. 1-4, 2001, pp. 1-3, Optical Society of America, Stresa, Italy.

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