Self-stimulated Raman scattering laser of In-Band pump

Abstract

The invention discloses a self-stimulated Raman scattering laser of an In-Band pump, which comprises a laser pump source, a laser energy transfer optical fiber, a first planoconvex lens for collimation, a second planoconvex lens for focusing, a reflection mirror of a resonator cavity, a laser gain dielectric crystal, a laser output mirror and a laser collimating mirror which are sequentially arranged, wherein pump light outputted by the laser pump source is transmitted to the first planoconvex lens via the laser energy transfer optical fiber, collimated by the first planoconvex lens, focused by the second planoconvex lens and further focused on the end surface of the laser gain dielectric crystal, the laser gain dielectric crystal produces stimulated radiation after absorbing the pump light, when the radiation of fundamental frequency light in the resonator cavity exceeds the self-stimulated Raman scattering threshold of the laser gain dielectric crystal, the produced Raman laser is collimated and outputted by the laser collimating mirror. The self-stimulated Raman scattering laser can improve the self-stimulated Raman scattering conversion rate, eliminate the thermal relaxation process from the pump energy level to the laser energy level of electrons of the conventional pump way, improve the quantum efficiency, reduce the heat and increase the self-stimulated Raman scattering conversion rate.

Description

technical field

[0001] The invention relates to a laser, in particular to an In-Band pumped self-excited Raman scattering laser. Background technique

[0002] Stimulated Raman scattering is one of the important means of laser nonlinear frequency conversion. Many laser gain crystals have the characteristics of stimulated Raman scattering. Therefore, this crystal can be used not only as a laser gain medium but also as a Raman crystal. The two crystals can be combined into one, that is, the self-stimulated Raman scattering laser, which makes the whole laser system simple and compact. Based on the above advantages, the self-stimulated Raman scattering effect of the laser gain medium has gradually been used in recent years. People pay attention to it, but this simple structure also has its disadvantages. When the pump power is high, the temperature of the laser gain medium crystal will increase, and this temperature increase will seriously affect the efficiency of stimulated Rama...

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