Gain flattening Raman fiber wavelength conversion coupler and method

Abstract

The invention discloses a gain flattening Raman fiber wavelength conversion coupler and a method. A transverter of the gain flattening Raman fiber wavelength conversion coupler comprises a signal light generator, an erbium-doped optical fiber amplifier, a plurality of detection light laser devices, a consecutive pumped laser device and a first wave combiner. A first wave separator is connected on the output port of the first wave combiner through a first segment of a third optical fiber, a second wave combiner is connected on the output port of the first wave separator, and a second wave separator is connected on the second wave combiner through a second segment of the third optical fiber. The method comprises that the signal light generator is selected to form pumped signal light, the plurality of detection light laser devices are selected, the pumped signal light is coupled with much consecutive light, wavelength is converted, much detection light with different light power is output, the consecutive pumped laser device is selected, consecutive pumped light is coupled with much detection light, gain is compensated, and much detection light with equal power is output. The gain flattening Raman fiber wavelength conversion coupler and the method are high in conversion speed, good in output signal extinction ratio, capable of simultaneously converting in a waveband-cross and multi-wavelength mode and flat in the gain.

Description

technical field [0001] The invention relates to the technical field of optical communication, in particular to a Raman fiber wavelength conversion coupler and method with flat gain. Background technique [0002] Wavelength division multiplexing technology is the preferred technology for high-speed broadband and large-capacity optical fiber communication technology. In an optical cross-connect node of a wavelength division multiplexing communication system, when two signals of the same wavelength in different optical fibers enter the same optical fiber, the problem of wavelength blocking occurs. Due to the limitations of various factors in the system, the number of wavelengths that can be multiplexed by each optical fiber is limited, so this situation will inevitably occur at the optical cross node. An effective way to solve this problem is to use wavelength conversion technology to convert one signal wavelength to other wavelengths, so as to avoid wavelength blocking in OXC...

AI Technical Summary

Problems solved by technology

At present, there are many methods for all-optical wavelength conversion, mainly based on the cross-gain modulation effect, cross-phase modulation effect, cross-polarization modulation effect, and four-wave mixing effect in semiconductor optical amplifiers; based on the cross-absorption modulation effect in electro-absorption modulators; Cascaded sum frequency and difference frequency effects in polarized lithium niobate waveguides; based on cross-phase modulation effects and four-wave mixing effects in dispersion-shifted high nonlinear fibers; based on cross-phase modulation effects and four-wave mixing effects in silicon nanofibers Effect; based on the cross-phase modulation effect, four-wave mixing effect, and cross-polarization modulation effect in dispersion-flat photonic crystal fibers; based on the cross-phase modulation effect and four-wave mixing effect in sulfide waveguides, based on the four-wave Mixing effect, etc.; but these methods have their own advantages and disadvantages in terms of system structure, operating speed, device cost, wavelength conversion range, and polarization sensitivity

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