Low-cost gain-clamped EDFA for passive optical TWDM network application

摘要

A communication system (100) comprising: a first optical system (242, 242a) optically connected to a clamping laser (202) and a pump laser (204), the first optical system (242, 242a) having first and second optical systems second optical splitter (244, 244a, 244b), wherein the first optical splitter (244, 244a) is configured to receive a clamp laser signal (203) from the clamp laser (202) and split the received clamp laser signal (203) into split clamp laser signals (244). 203a, 203aa-an), wherein the second optical discs (244, 244b) are configured to receive a pump laser signal (205) from the pump laser (204) and convert the received pump laser signal (205) into split pump laser signals (205a, 205aa -An) to share; and a second optical system (270) optically coupled to the first optical system (242, 242a), the second optical system (270) including amplifier systems (200), each amplifier system (200) configured to be a multiplexed one Signal (220u) and comprising first and second combiners (212, 212a, 212b) optically connected to an erbium-doped fiber (230), the first combiner (212, 212a) having the first divider (244, 244a), the second combiner (212, 212b) being optically coupled to the second divider (244, 244b), the first combiner (212, 212a) being configured to: receive the multiplexed signal (220u) and one of the split clamp laser signals (203a, 203aa-an); and combining the multiplexed signal (220u) and the one of the split clamp laser signals (203a, 203aa-an) into a first combined signal (222), the second combiner (212, 212b) configured to: receive the first combined signal (222 ) and one of the divided pump laser signals (205a, 205aa-an); and combining the first combined signal (222) and the one of the split pump laser signals (205a, 205aa-an) into a second combined signal (223); and wherein the erbium doped fiber (230) is configured to: receive the second combined signal (223); Amplifying the multiplexed signal (220u) and the split clamp laser signal (203a, 203aa-an) of the second combined signal (223); Attenuating the split pump laser signal (205a, 205aa-an) of the second combined signal (223); and outputting an amplified output signal (224) from the second optical system (270), wherein the amplified output signal (224) comprises the amplified multiplexed signal (220u), the amplified split clamp laser signal (203a, 203aa-an), and the damped split pump laser signal (205a , 205aa-an).