Raman multi-wavelength converter and method for realizing gain flatness by connecting two fibers in series

Abstract

The invention discloses a Raman multi-wavelength converter and method for realizing gain flatness by connecting two fibers in series. The converter comprises a signal light generator, an erbium doped fiber amplifier, a plurality of detecting light lasers, a continuous pump laser and a first wave combiner, wherein the output end of the first wave combiner is connected with a first wave separator through a third optical fiber; the output end of the first wave separator is connected with a second wave combiner; and the output end of the second wave combiner is connected with a second wave separator through a sixth fiber. The method comprises the following steps of: selecting a signal light generator, to form a pump signal light; selecting the plurality of detecting light lasers, wherein the pump signal light is coupled with a plurality of continuous detecting light for wavelength conversion to output a plurality of detecting light with different light powers; and selecting the continuous pump laser, wherein the continuous pump light is coupled with a plurality of detecting light for gain compensation to output a plurality of detecting light with equal light powers. The Raman multi-wavelength converter is reasonable in design, high in conversion rate, good in output signal extinction ratio, and can realize cross-waveband and multi-wavelength simultaneous conversion and gain flatness.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a Raman multi-wavelength converter and a method for achieving flat gain by connecting two types of optical fibers in series. Background technique [0002] Since the 1990s, due to the obvious advantages of the wavelength division multiplexing (WDM) method in the optical transmission network, its development has been extremely rapid. With the continuous improvement of the performance of WDM devices, optical amplifiers and optical fibers, the number of channels is also gradually increasing. It is conceivable that although the bandwidth of the optical fiber network is relatively wide, the number of wavelengths that can be multiplexed in an optical fiber is still limited, so the number of available wavelengths will be much less than the number of nodes and users, and the problems of all-optical routing and wavelength competition are also increasingly prominent. Just im...

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Problems solved by technology

[0012] 1. The system structure is huge and complex, the conversion efficiency is low, and the requirements for converting signal light are high, such as wavelength converters based on the four-wave mixing effect in semiconductors and optical fibers

[0013] 2. The conversion wavelength has poor stability and is easily affected by the surrounding environment, such as distributed Bragg reflection laser diode wavelength converters

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