Device and method for suppressing stimulated Brillouin scattering of continuous laser by use of rotating wave plate

Abstract

A device for suppressing stimulated Brillouin scattering of continuous laser by use of a rotating wave plate comprises a wave plate turntable, wherein the wave plate turntable includes a wave plate rotating around a rotating shaft, a plurality of half-wave plates distributed symmetrically in relative to the rotating shaft on a round plane formed by the wave plate rotating one circle around the rotating shaft, and an air space or a full-wave plate between adjacent half-wave plates. The device is characterized in that the half-wave plate is identical to the full-wave plate or the air space between the half-wave plates in shape and size, so that the wave plate turntable can rotate at a uniform velocity as high as possible when a continuous laser beam passes through the wave plate turntable.

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

The central idea is to use a rotating wave plate to make the laser beams have different polarization directions at the front and back positions, preferably perpendicular to each other, which can well suppress the amplification of the stimulated Brillouin light generated by the front end of the laser beam at the back. effect, but the patent only proposes such a method. It is undoubted that this method has a certain suppression effect on Brillouin scattering, but the application does not involve how to achieve a better suppression effect on a specific laser beam. For example, although a continuous laser beam can achieve a certain suppression effect as long as the laser beam has mutually perpendicular polarization states on the front and rear positions, how to achieve a better suppression effect is unknown to those skilled in the art. Invention is proposed for this problem

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