Single-frequency solid-state raman laser

Abstract

The invention relates to a single-frequency solid-state raman laser, and belongs to the technical field of lasers. The single-frequency solid-state raman laser comprises a pumping source, a coupling lens group, a laser gain medium, a raman crystal, an endoscope M1, an endoscope M3, an endoscope M4, a beam splitter M5 and a temperature control system, wherein the pumping source outputs a pump light; the coupling lens group, the endoscope M1, the laser gain medium, the raman crystal, the endoscope M3, a first FP etalon, a second FP etalon, the endoscope M4 and the beam splitter M5 are arranged along the propagation direction of the pump light; the temperature control system is arranged out of the laser gain medium and the raman crystal, so that stable single-frequency raman laser output with a high-peak power can be achieved; the single-frequency solid-state raman laser can be applied to the fields of a sodium guide star, nonlinear conversion, terahertz generation, laser medical treatment and the like, and has the characteristics of being wide in applicability, compact in structure, good in stability, simple to operate, low in cost, beneficial to industrial production and the like.

Description

technical field [0001] The invention relates to a single-frequency solid-state Raman laser, belonging to the technical field of lasers. Background technique [0002] Due to its long coherence length, narrow spectral line width, and low noise, single-frequency lasers are widely used in the fields of laser radar, laser ranging, laser medical treatment, spectroscopy, and nonlinear optical frequency conversion. At present, in the research of solid-state single-frequency lasers, methods such as torsional mode resonators, short resonators, etalons or birefringent filters inserted into the resonators are generally used to make the laser operate in a single longitudinal mode. [0003] Raman lasers are lasers based on the principle of stimulated Raman scattering, through which we can obtain many special wavelengths that solid-state lasers cannot directly emit. The Raman laser output spectrum achieved by many conventional Raman lasers at the current stage is generally relatively broa...

AI Technical Summary

Problems solved by technology

Theoretically, the optical power density in the cavity must be very high to achieve Raman output, but in this patent document, in order to obtain single-frequency fundamental-frequency light, the etalon (reflectivity of fundamental-frequency light is 35%) is placed in the cavity with severe loss in the fundamental-frequency cavity Optical power density makes it difficult for Raman light to vibrate

In the structure adopted in the embodiment of this patent document, in order to realize the single-frequency Raman output, the Raman cavity longitudinal mode interval of the structure must be greater than the gain spectrum width of the Raman crystal, so this patent can only choose the narrowest gain spectrum width as possible Raman crystals such as Ba(NO 3 ) 2 , thus limiting the applicability of the patent

Images