Multi-wavelength Raman laser

Abstract

A multi-wavelength Raman laser disclosed in the invention comprises a fundamental frequency laser light source 1, a half-wave plate 2, a lens group 3, a reflecting mirror 4 and a strip-shaped stimulated Raman scattering crystal 5, the fundamental frequency laser light source 1 is used for emitting fundamental frequency laser with single wavelength; the half-wave plate 2 is a laser polarization adjusting device and is used for adjusting the polarization direction of the incident fundamental frequency laser to the horizontal polarization direction; the lens group 3 is used for zooming the beam aperture of the fundamental frequency laser which is adjusted to be horizontally polarized by the half-wave plate 2 to be matched with the aperture of the strip-shaped stimulated Raman scattering crystal 5, and transmitting to the reflecting mirror 4; the reflecting mirror 4 is used for reflecting the incident fundamental frequency laser, so that the fundamental frequency laser is vertically incident to the strip-shaped stimulated Raman scattering crystal 5; and the strip-shaped stimulated Raman scattering crystal 5 is used for enabling vertically incident fundamental frequency laser to generate a first-order stimulated Raman scattering effect and performing broken line type transmission to obtain multi-wavelength stimulated Raman scattering laser. The multi-wavelength Raman laser disclosed by the invention has the advantages of high first-order stimulated Raman scattering efficiency, same polarization of generated multi-wavelength laser, good stability, high practicability and the like.

Description

technical field [0001] The invention belongs to the technical field of lasers, and in particular relates to a multi-wavelength Raman laser, which utilizes laser light to transmit in a zigzag manner in a bar-shaped stimulated Raman scattering crystal to realize the output of multi-wavelength first-order stimulated Raman scattering lasers. Background technique [0002] Laser technology has been widely used in basic scientific research, clinical medicine, information communication, industrial technology and many other fields, and it is a powerful tool for the exploration and development of cutting-edge fields. With the development of laser differential detection, laser communication, spectral analysis, laser ranging and other fields, a single wavelength laser can no longer meet the application requirements, which requires lasers that can generate multiple wavelengths. Lasers are limited by the energy level structure of laser gain materials, and usually can only output lasers in...

AI Technical Summary

Problems solved by technology

The disadvantage of this scheme is: there is competition between the stimulated Raman scattering lasers of each wavelength corresponding to different Raman frequency shift characteristic lines, the power stability of the stimulated Raman scattering laser of each wavelength is poor, and the practicability is poor

The disadvantage of this scheme is: increasing the number of nonlinear stimulated Raman scattering crystals will increase the complexity and cost of the system

The disadvantage of this scheme is that the incident laser light forms two independent polarization components in the two main axis directions of the nonlinear Raman crystal, which respectively generate stimulated Raman scattering, which weakens the laser intensity in a single polarization direction and reduces the efficiency of nonlinear frequency conversion. Efficiency; at the same time, the polarization direction of each new wavelength laser is different, and it is inconvenient to use in applications related to laser polarization

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