Multi-Wavelength Light Source Based on Stimulated Raman Scattering Effect

Abstract

The invention discloses a multi-wavelength light source based on silicon-based stimulated Raman scattering effect, comprising a grating coupler, a silicon-based microring filter, a silicon-based waveguide and an output coupling waveguide; the silicon-based microring filter is an Add-Drop type, including a silicon-based microring and the first and second straight waveguides; the pump light enters the first straight waveguide through a grating coupler, and is coupled from the first straight waveguide to a silicon-based microring filter to filter light of the desired wavelength Entering the silicon-based waveguide, the first-order Stokes wave is generated by the stimulated Raman scattering of the silicon-based waveguide and input into the second straight waveguide, and part of the first-order Stokes wave is coupled to the output coupling waveguide by the second straight waveguide to output multiple wavelengths at equal intervals The remaining part of the laser is coupled to the silicon-based microring filter by the second straight waveguide and then input into the silicon-based microring. The invention utilizes the free spectral range of the silicon-based microring and the stimulated Raman scattering effect of the silicon-based waveguide to realize a multi-wavelength light source with fixed wavelength intervals, and has the advantages of compact structure and low power consumption, and is suitable for optical communication systems.

Description

technical field [0001] The invention relates to an integrated optical structure applied in the field of optical communication, in particular to a multi-wavelength light source based on the stimulated Raman scattering effect. Background technique [0002] In dense wavelength division or frequency division multiplexing systems, it is usually necessary to arrange multiple lasers and power supplies in the transmitter. This solution is complex, bulky and costly. To this end, scientists have proposed a scheme that uses a single light source to output multi-wavelength lasers, such as an optical frequency comb based on a highly nonlinear fiber, and uses a phase modulator to expand the laser spectrum to form a discontinuous multi-wavelength spectral source, thus obtaining a multi-channel optical fiber The wavelength of communication, however, the above-mentioned light sources cannot output multiple wavelengths at equal intervals, and the degree of integration needs to be further impr...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is how to use silicon-based integrated optical devices to realize integrated equal-spaced multi-wavelength light sources

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