Device and method for simultaneously detecting stimulated Brillouin scattering threshold and Raman scattering threshold of laser transmitted in water

Abstract

The invention discloses a device and a method for simultaneously detecting a stimulated Brillouin scattering threshold and a Raman scattering threshold of laser transmitted in water. The device comprises a seed injection laser (1). Pulsed laser transmitted by the laser (1) with a wavelength of 532nm is divided into two channels of pulse laser when being injected into a polarization coupling mirror (3) through a half-wave plate (2), wherein the first channel of pulse laser is received by a power meter (4) after being reflected by the polarization coupling mirror (3); and the other channel of pulse laser enters a water tank (6) filled with water through a quarter-wave plate (5). When the laser is transmitted to a 532nm fully reflecting mirror (7), part of light of 532nm in the laser is reflected to a power meter (8), the remaining light with a stimulated Brillouin scattering part directly penetrates through the 532nm fully reflecting mirror (7), and only the stimulated Brillouin scattering laser is left after penetrating through an optical filter (9) and is then received by a power meter (10). Respective attenuation coefficient for stimulated Brillouin scattering and Raman scattering can be calculated through substituting different values of I'2 in the existing formula (1), and further the stimulated Brillouin scattering threshold and the Raman scattering threshold can be obtained.

Description

A Device and Method for Simultaneously Detecting Stimulated Brillouin Scattering and Raman Scattering Thresholds of Laser Transmission in Water technical field The invention relates to a device and method for simultaneously detecting stimulated Brillouin scattering and stimulated Raman threshold. Background technique Optical Stimulated Brillouin Scattering and Stimulated Raman Scattering are used in many fields, such as studying the characteristics of stimulated laser light scattering media, used to generate optical signal amplification, etc., but because of their symbiotic relationship, Stimulated Brillouin Scattering The generation of is often accompanied by stimulated Raman scattering. At present, the research on stimulated Brillouin scattering and stimulated Raman scattering is at the expense of another kind of stimulated scattering. This method cannot detect stimulated Brillouin scattering and stimulated Raman scattering at the same time, but separates a single study...

AI Technical Summary

Problems solved by technology

In order to overcome the deficiency that the current situation of stimulated Brillouin scattering and stimulated Raman scattering cannot be studied simultaneously, the present invention provides an experimental device and method capable of simultaneously detecting stimulated Brillouin scattering and stimulated Raman scattering. The method can not only detect stimulated Brillouin scattering and stimulated Raman scattering separately, but also detect them simultaneously, which is of great help to the study of the relationship between stimulated Brillouin scattering and stimulated Raman scattering

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