Output power monitoring in an optical preamplifier

Details Output power monitoring in an optical preamplifier Output power monitoring in an optical preamplifier

H - Electricity

04

B

H04B 10/16 (2006.01) H01S 3/13 (2006.01) H01S 5/0683 (2006.01) H04B 10/148 (2006.01) H04B 10/158 (2006.01) H01S 3/131 (2006.01) H01S 5/50 (2006.01)

Patent

CA 2408674

Tapless output power monitoring is used when amplifying and converting an optical signal to an electrical signal, e.g., in a communications receiver of an optical transmission system. An optical preamplifier amplifies an intensity-modulated optical input signal to produce an amplified intensity-modulated optical signal. An optical-to- electrical (O-E) converter demodulates and converts the amplified intensity- modulated optical signal into an electrical output signal. A current monitor monitors a DC bias current of the optical-to-electrical (O-E) converter and produces a feedback signal proportional to the DC bias current. The optical preamplifier adjusts the gain of the amplified optical signal based on the feedback signal.

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