All-solid-state wide tuning long wave infrared laser source

Abstract

The invention provides an all-solid-state wide tuning long wave infrared laser source. The all-solid-state wide tuning long wave infrared laser source includes a near-infrared laser, a frequency conversion module, a short wave infrared seed laser generation module, a long wave infrared parameter laser generation module and a light beam splitting collimating and correcting module, wherein the frequency conversion module, the short wave infrared seed laser generation module, the long wave infrared parameter laser generation module and the light beam splitting collimating and correcting module are arranged successively in the laser outputting direction of the near-infrared laser; the near-infrared laser is used for outputting a first fixed wavelength laser beam; the frequency conversion module is used for simplify the first fixed wavelength laser beam and converting the first fixed wavelength laser beam into a second fixed wavelength laser beam; the short wave infrared seed laser generation module is used for converting the unconverted first fixed wavelength laser beam into a third tunable wavelength laser beam; the long wave infrared parameter laser generation module is used for converting the second fixed wavelength laser beam into a tunable long wave infrared laser beam, based on injection of the third tunable wavelength laser beam; and the light beam splitting collimating and correcting module is used for performing light splitting, collimation and correction on the tunable long wave infrared laser beam, and then outputting the tunable long wave infrared laser beam. The all-solid-state wide tuning long wave infrared laser source can realize output of an 8-14Mum long wave infrared laser beam, with a low threshold, high efficiency, high beam quality and wide tuning.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to an all-solid-state wide-tunable long-wave infrared laser source. Background technique [0002] 8-14μm belongs to the long-wave infrared band, which is an extremely important atmospheric window. The atmospheric absorption and scattering loss of long-wave infrared radiation in this band is extremely small, and it can easily penetrate turbid air, smoke, fog, haze, rain, snow and other harsh conditions. background, and the infrared thermal radiation characteristic spectrum of various equipment, factories, personnel and other ground and water targets is in this band, so the 8-14 μm long-wave infrared coherent radiation is widely used in atmospheric monitoring, optical remote sensing, spectral analysis, space optical communication, Environmental protection, medical treatment, photoelectric countermeasures and other fields have great application value, and have become hotspots and diffic...

AI Technical Summary

Problems solved by technology

[0003] At present, there are three main ways to obtain 8-14 μm long-wave infrared laser in the world: (1) CO 2 Gas laser, whose wavelength is fixed discrete lines between 9.5-10.8 μm, has the advantage of high output power, but it has disadvantages such as difficult wavelength tuning and narrow range, large volume and difficulty in precision.

(2) Semiconductor quantum cascade laser, which can theoretically achieve an extremely wide wavelength range, is small in size and light in weight, but its material growth is difficult and breakthrough is difficult, and it is still in the laboratory research stage

For the currently available 8-14μm infrared crystals, the bulk damage threshold and infrared laser film damage threshold are only close to or even lower than the pumping threshold of OPO / OPG, which makes it difficult for the traditional OPO / OPG method to effectively generate 8-14μm laser light. , especially high power / high energy 8-14μm laser output

[0006] In summary, the lag of nonlinear infrared crystal materials and related long-wave infrared parametric laser technology directly leads to the stagnation of laser research in the 8-14 μm band.

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