Patent ID: 9722559
Date: 2017-08-01
CPC Classifications: H01S,H03F,H03G,H04B

Claim:
1. A Hybrid Fiber Amplifier comprising a Raman fiber amplifier, and an erbium-doped optical fiber amplifier without variable optical attenuator, wherein the Raman fiber amplifier comprises: pump signal combiner; pump laser group connected to a reflection end of the pump signal combiner; an out-of-band narrow-band filter connected to an output end of the pump signal combiner; a photodetector connected to a reflection end of out-of-band narrow-band filter, wherein the erbium-doped optical fiber amplifier comprises, in sequential connection: an input coupler; an erbium-doped fiber; an output coupler; an input photodetector connected to a small end of the input coupler; and an output photodetector connected to a small end of the output coupler, wherein the output end of out-of-band narrow-band filter is connected with the input end of input coupler, wherein the Hybrid Fiber Amplifier also comprises a control module that, in accordance with desired amplification requirements, controls the gain and/or gain slope of the Raman fiber amplifier and the gain and/or gain slope of the erbium-doped optical fiber amplifier to adjust total gain and/or total gain slope of the Hybrid Fiber Amplifier.