Bidirectional Raman erbium-doped optical fiber hybrid amplifier and optical signal amplification method and system

Abstract

The embodiment of the invention discloses a bidirectional Raman erbium-doped fiber hybrid amplifier, an optical signal amplification method and an optical communication system. The optical fiber hybrid amplifier comprises a Raman pump output port, a bidirectional Raman amplifier, a 2 * 2 optical switch, an erbium-doped optical fiber amplifier input connection port, an erbium-doped optical fiber amplifier, an erbium-doped optical fiber amplifier output connection port and a system signal optical port. The Raman pump output port, the bidirectional Raman amplifier, the 2 * 2 optical switch and the system signal optical port are sequentially connected through an optical path, and the erbium-doped optical fiber amplifier is connected with the 2 * 2 optical switch through the erbium-doped optical fiber amplifier input connecting port and the erbium-doped optical fiber amplifier output connecting port. The 2 * 2 optical switch can gate a connection path between the bidirectional Raman amplifier and system signal light port and the output and input connection ports of the erbium-doped fiber amplifier, thereby realizing opposite or same-direction propagation of the pump light and the signallight. According to the embodiment of the invention, the Raman pump output end is stably connected with the optical fiber, repeated plugging is not needed, and single-fiber duplex is supported.

Description

technical field [0001] The embodiments of the present application relate to optical fiber communication technology, and in particular to a bidirectional Raman erbium-doped fiber hybrid amplifier, an optical signal amplification method, and an optical communication system. Background technique [0002] With the emergence of the Raman optical time domain reflectometer (OTDR, Optical Time Domain Reflectometer) hybrid amplifier, the Raman amplifier is used more and more in the trunk line. With the deepening of the application, for the Raman amplifier single-fiber bidirectional The demand is also increasing. For Raman amplifiers, bidirectional applications only need to remove the isolator in the optical path, without any impact on the control of the Raman amplifier itself. But for the Raman erbium-doped fiber hybrid amplifier single-fiber bidirectional application, since the erbium-doped fiber amplifier (EDFA, Erbium-Doped Fiber Amplifier) ​​must be added to the input and output...

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Problems solved by technology

But for the Raman erbium-doped fiber hybrid amplifier single-fiber bidirectional application, since the erbium-doped fiber amplifier (EDFA, Erbium-Doped Fiber Amplifier) ​​must be added to the input and output erbium-doped fiber (EDF, Erbium-Doped Fiber) intermediate stage isolator to suppress the reflection Amplified Spontaneous Emission (ASE, Amplified Spontaneous Emission), so the existing Raman erbium-doped fiber hybrid amplifier cannot be applied to optical communication systems

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