In-line two-stage erbium doped fiber amplifier system

Details In-line two-stage erbium doped fiber amplifier system In-line two-stage erbium doped fiber amplifier system

H - Electricity

04

B

H04B 10/12 (2006.01) H01S 3/067 (2006.01) H04B 10/08 (2006.01) H04B 10/17 (2006.01)

Patent

CA 2126600

- 15 - IN-LINE TWO-STAGE ERBIUM DOPED FIBER AMPLIFIER SYSTEM Abstract The present invention is an in-line multi-stage erbium doped fiber amplifier system for use in fiber optic communication systems. The system comprises two cascaded erbium doped fiber amplifiers (12), (14) separated by an drop/add device (20) for filtering out the amplifier spontaneous emission noise and the existing telemetry channel and for adding a new telemetry channel before the second amplifier (14). The invention also provides a method for providing a telemetry signal to in-line erbium doped fiber amplifier sites without affecting the signal capacity of the system, and also provides a method for monitoring the performance of a link in an optical fiber communication system.

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