Device and method for suppressing stimulated Brillouin scattering based on magneto-optical effect

Abstract

The invention relates to a device and a method for suppressing stimulated Brillouin scattering based on magneto-optical effect, which can suppress the occurrence of stimulated Brillouin scattering by using a magneto-optical rotation medium to periodically change the polarization state of a laser beam.

Description

technical field [0001] The invention relates to stimulated Brillouin scattering and belongs to the technical field of optoelectronics. Background technique [0002] Stimulated Brillouin scattering is a well-known technology in the field, and is widely used in the fields of phase conjugate compensation, laser detection, and optical communication. In different applications, the requirements for stimulated Brillouin scattering are also different. Yes, in the application of laser detection and phase conjugate compensation, high-intensity stimulated Brillouin scattering signals are generally required. At this time, the stimulated Brillouin scattering signals are generally amplified as much as possible to obtain the best results , but in some fields such as optical communication, it is necessary to control the intensity of stimulated Brillouin scattering, that is, not simply pursuing the occurrence of maximum stimulated Brillouin scattering, but in other cases it is desired to sup...

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Problems solved by technology

[0002] Stimulated Brillouin scattering is a well-known technology in the field, and is widely used in the fields of phase conjugate compensation, laser detection, and optical communication. In different applications, the requirements for stimulated Brillouin scattering are also different. Yes, in the application of laser detection and phase conjugate compensation, high-intensity stimulated Brillouin scattering signals are generally required. At this time, the stimulated Brillouin scattering signals are generally amplified as much as possible to obtain the best results , but in some fields such as optical communication, it is necessary to control the intensity of stimulated Brillouin scattering, that is, not simply pursuing the occurrence of maximum stimulated Brillouin scattering, but in other cases it is desired to suppress The occurrence of stimulated Brillouin scattering, because the generated stimulated Brillouin scattering signal may have a destructive effect on the medium in which it is transmitted, or may increase noise in the transmitted signal. Faced with such technical problems, people Various methods and devices for controlling or suppressing the intensity of the stimulated Brillouin scattering signal have been proposed. The method for suppressing the occurrence of stimulated Brillouin scattering in the prior art generally involves phase modulation of the laser beam to broaden the laser beam. Output spectral lines, but such methods generally require complex modulation mechanisms or units, and require high control precision, resulting in increased manufacturing costs and use costs

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