Variable-gain gain-clamped optical amplifiers

Details Variable-gain gain-clamped optical amplifiers Variable-gain gain-clamped optical amplifiers

2006-07-25

2006-07-25

Hughes, Deandra M. (Department: 3663)

Optical: systems and elements

Optical amplifier

Particular active medium

Reexamination Certificate

active

07081990

ABSTRACT:
An optical amplifier is disclosed comprising a signal semiconductor optical amplifier having a waveguide, forming at least part of a signal path between an input and an output, extending along a signal active region for amplification of a signal. The amplifier also includes a control active region of semiconductor material having a gain which is controllable independently from the gain of the signal active region. The amplifier also includes a laser cavity containing both the signal active region and the control active region and being capable of clamping the gain of the signal active region, and the control active region is arranged not to amplify a signal in the signal path within a predetermined signal band.

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