Full light wave converter based on laser four wave mixing effect

Abstract

The invention discloses an all optical wavelength converter based on laser four-wave frequency mixing effect, composed of a laser, a looper and a filter, where the laser is an optical-fiber grating external-cavity semiconductor laser, a signal at angular frequency of omega s is injected through the looper to the laser and generates the four-wave frequency-mixing effect with the pumping light at angular frequency of omega p in an active medium so as to generate a conjugate light at angular frequency of 2 omega p-omega s, forming a conversion output signal, which is coupledly inputted to the filter through the looper, thus realizing the wavelength conversion. As compared with the SOA-based wavelength converter, it needs no additional pumping light source because the laser directly provides wavelength conversion, simple-structural and low-cost; it adopts optical-fiber grating, therefore it has the advantages of high stability of wavelength conversion, and regulable wave conversion.

Description

technical field [0001] The invention relates to an optoelectronic device for optical fiber communication, in particular to an all-optical wavelength converter with four-wave mixing effect. Background technique [0002] Wavelength division multiplexing technology is the preferred technology for high-speed broadband and large-capacity optical fiber communication. 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 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 of the signal wavelengths to other wavelengths, thereby avoiding wavelen...

AI Technical Summary

Problems solved by technology

[0008] The present invention is to solve the problem that the existing all-optical wavelength conversion device based on the four-wave mixing effect needs to provide pumping light with stable wavelength and narrow linewidth, which makes the device structure complicated and high in cost. It provides a fiber grating based The all-optical wavelength conversion device of the four-wave mixing effect in the external cavity semiconductor laser, it does not need an additional pump light source, has a simple structure, low cost, and has the outstanding advantages of high conversion wavelength stability and adjustable conversion wavelength

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