Optical amplifier

Details Optical amplifier Optical amplifier

2003-01-27

2011-11-22

Bolda, Eric (Department: 3663)

Optical: systems and elements

Optical amplifier

Correction of deleterious effects

C359S337100, C359S337210, C359S337300

Reexamination Certificate

active

08064130

ABSTRACT:
It is an object of the present invention to provide an optical amplifier using optical amplification mediums each doped with a rare earth element for increasing amplification efficiency of signal light in S-band and the like. To this end, the optical amplifier is constituted such that, when performing optical amplification for S-band and the like in which a center wavelength of a gain peak in the optical amplification medium is located at an outside of a signal band, a gain coefficient of when a pumping condition of the optical amplification medium is maximum is set so that a parameter η obtained by dividing a minimum value of the gain coefficient in the signal band by a maximum value of the gain coefficient outside of the signal band becomes a previously set value or more, wherein, for example, the parameter η can be increased by controlling a temperature of each of a plurality of EDFs between which gain equalizers are disposed.

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