Multi-wavelength light source based on stimulated raman scattering effect

Abstract

The invention discloses a multi-wavelength light source based on the stimulated raman scattering effect. The multi-wavelength light source comprises an optical grating coupler, a silicon-based annulet filter, a silicon-based waveguide and an output coupling waveguide. The silicon-based annulet filter is an Add-Drop type and comprises a silicon-based annulet, a first straight waveguide and a second straight waveguide. The pump light is input into the first straight waveguide through the optical grating coupler, the pump light is coupled to the silicon-based annulet filter through the first straight waveguide, the needed-wavelength light obtained through filtration enters the silicon-based waveguide, the stimulated raman scattering is carried out through the silicon-based waveguide to generate a one-level stokes wave input into the second straight waveguide, one part of the one-level stokes wave is coupled to the output coupling waveguide through the second straight waveguide, equal-interval and multi-wavelength lasers are output, and the rest of the one-level stokes wave is coupled to the silicon-based annulet filter to be input into the silicon-based annulet again. The multi-wavelength light source with fixed wavelength intervals is achieved through the free spectrum range of the silicon-based annulet and the stimulated raman scattering of the silicon-based waveguide, and the multi-wavelength light source has the advantages of being compact in structure, low in power consumption and the like, 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...

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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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