Raman amplifier

Details Raman amplifier Raman amplifier

2006-01-17

2006-01-17

Hellner, Mark (Department: 3663)

Optical: systems and elements

Optical amplifier

Raman or brillouin process

Reexamination Certificate

active

06987608

ABSTRACT:
A Raman amplifier can easily reduce the gain variation in Raman amplification even when the power of an input signal varies. The Raman amplifier is provided with (a) an optical fiber that Amplifies an input lightwave to produce an output lightwave, (b) a pump-lightwave-supplying means that supplies pump lightwaves having a plurality of wavelengths to the optical fiber, and (c) a control unit that controls only the power of the pump lightwave having the shortest wavelength among the pump lightwaves so that the average value of the gain of the Raman amplification by the optical fiber in an intended wavelength range can be maintained constant.

REFERENCES:
patent: 6785042 (2004-08-01), Onaka et al.
patent: 6813067 (2004-11-01), Birk et al.
patent: 001503528 (2005-02-01), None
Emori et al.; “Broadband Lossless DCF Using Raman Amplification Pumped by Multichannel WDM Laser Diodes”,Electronics Letters:c. 1998 IEEE; vol. 34 No. 22; Electronic Letters Online No. 19981509; Japan.

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