Intermediate infrared laser device with tunable inner cavity OPO

Abstract

The invention discloses an intermediate infrared laser device with an tunable inner cavity OPO. The intermediate infrared laser device comprises an LD semiconductor pumping source, an optical fiber coupling system, a laser gain crystal, an air-cooling radiator, a crystal temperature control furnace, a film-coated endoscope and a periodically poled crystal. The film-coated endoscope comprises a front-cavity mirror plane mirror M1, an intracavity focusing lens, an OPO front-cavity mirror plane mirror M2 and a rear-cavity mirror M3. A light source generated by the LD semiconductor pumping source passes through the optical fiber coupling system and is output. The front-cavity mirror plane mirror M1, the laser gain crystal, the intracavity focusing lens, the OPO front-cavity mirror plane mirror M2, the periodically poled crystal and the rear-cavity mirror M3 are sequentially arranged in the output direction of the coupling light source of the optical fiber coupling system in parallel. The laser gain crystal is arranged on the air-cooling radiator. The periodically poled crystal is arranged on the crystal temperature control furnace. The intermediate infrared laser device is simple and compact in structure, low in energy consumption and capable of being miniaturized and fully solidified easily, and can be mounted onboard or on vehicles.

Description

technical field [0001] The invention relates to a mid-infrared laser, in particular to an inner-cavity OPO tunable mid-infrared laser based on a quasi-phase-matched optical parametric oscillation. Background technique [0002] Lasers have been developed so far, and their output bands cover almost all bands from deep ultraviolet to far infrared. Among them, the mid-infrared band (2-6 microns) is not only the atmospheric infrared window with the smallest attenuation, but also covers the absorption peaks of many atoms and molecules. Therefore, lasers in this band are used in spectroscopy, remote sensing, medical treatment, environmental protection and military affairs. It has important applications in many fields. Therefore, the research of mid-infrared band lasers has become a hot spot in the research and development of lasers in various countries. [0003] In terms of the principle of generating mid-infrared lasers, there are mainly two types. One is the generation of line...

AI Technical Summary

Problems solved by technology

But usually the light conversion efficiency is low, the energy consumption is high, and the volume is large

Moreover, water cooling is often required, the system is complicated, maintenance is difficult, it is not easy to move, and it is difficult to realize vehicle-mounted and airborne work

These shortcomings greatly limit the application of OPO mid-infrared lasers in airborne gas detection, military photoelectric countermeasures, etc.

Images