Cascaded optical amplifier and control method thereof

Details Cascaded optical amplifier and control method thereof Cascaded optical amplifier and control method thereof

2008-01-07

2010-11-30

Hellner, Mark (Department: 3663)

Optical: systems and elements

Optical amplifier

Correction of deleterious effects

C359S337500

Reexamination Certificate

active

07843630

ABSTRACT:
A cascaded optical amplifier including a first optical amplifier and a second optical amplifier in cascaded arrangement is provided. Each of the first optical amplifier and the second optical amplifier has a respective input for receiving an optical signal, an output for outputting an amplified optical signal, and a control input for controlling the gain of the optical amplifier. The cascaded optical amplifier includes a sensor for sensing upstream of the input of the second optical amplier a signal relating to operation of the cascaded optical amplifier. In addition, the cascaded optical amplifier includes a controller for providing control signals to the respective control inputs of the first amplifier and the second amplifier, the controller providing the control signal to the second optical amplifier as a function of the sensed signal.

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International Search Report and Written Opinion for corresponding International Application No. PCT/IB2008/000022 mailed Jun. 16, 2008.

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