Apparatus and method for Raman gain control

Optical: systems and elements – Optical amplifier – Raman or brillouin process

Reexamination Certificate

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Reexamination Certificate

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07924496

ABSTRACT:
Systems and methods for controlling a Raman amplifier by measuring power at one end of an optical fiber span. The Raman amplifier may include a laser that pumps an optical signal into the optical fiber span. The Raman amplifier may be connected to a controller that receives backscatter measurements. The controller may then adjust the Raman amplifier to maintain the backscatter substantially constant.

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