Infrared solid laser based on external cavity optical parametric oscillation and simulated Raman scattering effect

Abstract

The invention discloses an infrared solid laser based on external cavity optical parametric oscillation and simulated Raman scattering effect. The infrared solid laser comprises a pumping source, a half wave plate, a coupling lens, a laser resonant cavity, an OPO crystal and a Raman crystal; the laser resonant cavity is a four-mirror annular cavity composed of a pair of flat mirrors and a pair ofconcave mirrors; two light paths between two flat mirrors and two concave mirrors are intersected to form a 8-shaped light path; the OPO crystal is located on a light path between two concave mirrors,and the Raman crystal is located on the light path between two flat mirrors; the pumping laser output by the pumping source is incident upon the laser resonant cavity from one concave mirror of the laser resonant cavity after orderly passing through the half wave plate and the coupling lens. The laser system disclosed by the invention is composed of a external cavity optical parametric oscillator(OPO) and the Raman laser; the light parametric oscillator adopts the quasi-phase matching technology to realize the wide tuning of the signal light and the idle frequency light, the signal light isused as base frequency light, thereby realizing the tunable output of the Raman light. The all solid-state design can be realized, the structure is simple and compact, and the working stability is good.

Description

technical field [0001] The invention relates to an infrared solid laser with multi-wavelength simultaneous output, in particular to a tunable continuous wave infrared solid laser based on external cavity optical parametric oscillation and stimulated Raman scattering effect. Background technique [0002] Tunable continuous wave multi-wavelength infrared lasers have important application prospects in the fields of spectral analysis, atmospheric monitoring, remote sensing, and photoelectric countermeasures. The solid-state laser based on optical parametric oscillation and crystal stimulated Raman scattering effect has the following characteristics: (1) The high power density of the fundamental frequency light in the cavity is used to reduce the crystal stimulated Raman scattering threshold; (2) the signal of the cavity resonance The light has a narrow linewidth, which can increase the Raman gain coefficient of the Raman crystal, thereby improving the Raman light conversion effi...

AI Technical Summary

Problems solved by technology

However, the technology of method (1) is not very mature and is still in the development stage; method (2) is difficult to achieve wider wavelength tuning through Raman crystal temperature tuning; and method (2) and method (3) cannot be realized Multi-wavelength simultaneous output in wavelength-tunable near-infrared and mid-infrared bands

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