Raman laser based on YVO4-SiO2 optical fibers

Abstract

The invention relates to a Raman laser based on YVO4-SiO2 optical fibers. The laser comprises a first pumping laser, an optical fiber isolator, a first fiber grating, a first YVO4-SiO2 optical fiber,a second fiber grating, a first optical fiber wavelength division multiplexer, a second optical fiber wavelength division multiplexer, a second YVO4-SiO2 optical fiber and a third optical fiber wavelength division multiplexer; the first fiber grating and the second fiber grating form a resonant cavity of the Raman laser; the second optical fiber wavelength division multiplexer is connected with asecond pumping laser, and the second optical fiber wavelength division multiplexer, the second pumping laser, the second YVO4-SiO2 optical fiber and the third optical fiber wavelength division multiplexer form a Raman amplification structure. The length of the YVO4-SiO2 optical fiber used by the Raman laser can reach hundreds of meters, and the problem that the current YVO4 Raman crystal is shortin length can be effectively solved; meanwhile, the Raman laser adopts an optical fiber structure, so that the heat dissipation efficiency of the laser can be greatly improved, and the heat dissipation problem of the current high-power YVO4 solid Raman laser can be effectively solved.

Description

technical field [0001] The invention relates to a YVO-based 4 -SiO 2 An optical fiber Raman laser belongs to the technical field of Raman lasers. Background technique [0002] Solid-state Raman laser is an important way to realize laser frequency conversion, which effectively extends the spectral range of laser. When the pump light of a certain wavelength is incident on the Raman medium, the interaction between the pump light and the Raman medium will produce a laser output of a new wavelength, and the newly generated laser wavelength is determined by the wavelength of the pump light and the Raman medium, so By selecting different pump light and Raman medium, laser output with wavelengths ranging from ultraviolet to near infrared can be obtained. At present, solid-state Raman lasers have been widely used in the fields of information, transportation, medical treatment, national defense and scientific research. [0003] The Raman medium is the core device of the solid-stat...

AI Technical Summary

Problems solved by technology

[0004] Traditional YVO 4 The solid-state Raman laser is made of lens, laser gain medium and YVO 4 Resonant cavity structure composed of Raman crystals, YVO 4 As the core device of the laser, the length of the crystal plays an important role in the performance of the laser, and the current mature commercial YVO 4 The length of Raman crystals generally does not exceed 50mm, which greatly limits the current YVO 4 Development of solid-state Raman lasers

In addition, the Raman laser will produce serious thermal effects in the high-power operation mode, which will lead to poor stability and lower output power of the Raman laser, which has become a limitation of the current YVO 4 Another unfavorable factor for the development of solid-state Raman lasers

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