Spectrum body capable of improving laser photoelectric conversion efficiency and optical quality

Abstract

The invention discloses a spectrum isolation sheet capable of improving laser photoelectric conversion efficiency and optical quality. The spectrum isolation sheet is arranged between a xenon lamp anda crystal, and the spectrum isolation sheet is made of cerium-doped quartz glass. And one surface of the spectrum isolation sheet is plated with a total reflection film for isolating near-infrared light from 0.87 mu m to 1.2 mu m. And the other surface of the spectrum isolation sheet is coated with a layer of light substance which is used for absorbing light of 0.6-0.7 mu m and can be converted into light of 0.8-0.9 mu m. According to the absorption characteristics of the YAG laser crystal, the spectrum conversion mode is adopted, the part of useful spectrum of the laser crystal is increased,the part of harmful wave bands is isolated, the laser photoelectric conversion efficiency is improved, and the laser output optical quality is improved. Through the two times of conversion, the laserefficiency can be improved by more than 40%, the thermal lens effect of the crystal is reduced, the light beam quality is greatly improved, and the effect is very obvious especially for a high-powerlaser.

Description

technical field [0001] The invention relates to a spectrum sheet capable of improving laser photoelectric conversion efficiency and optical quality. Background technique [0002] Nd: YAG crystal is currently the laser crystal with the best comprehensive performance. The laser wavelength is 1064nm, which is widely used in military, industrial and medical industries. There are five absorption peaks in the YAG crystal 0-1.3μm spectral range, of which 0.75μm and 0.81μm absorb strongly, and contribute the most to the generation of 1.06μm laser. [0003] It is known that as a Nd:YAG crystal pumping source, the energy corresponding to the xenon lamp luminescence spectrum matches the YAG crystal absorption peak is very little, accounting for about 15% to 20% of the total energy; the light with wavelength λ<0.5μm and λ The light of >0.87μm is not only useless to produce YAG laser, but harmful; irradiating the crystal with ultraviolet light of λ<0.3μm will cause the crystal ...

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Problems solved by technology

[0003] It is known that, as a Nd:YAG crystal pumping source, the energy corresponding to the xenon lamp luminescence spectrum matches the YAG crystal absorption peak is very little, accounting for about 15% to 20% of the total energy; the wavelength λ0.87μm is not only useless to produce YAG laser, but harmful; irradiating the crystal with ultraviolet light of λ<0.3μm will cause the crystal to produce a color center, thereby reducing the laser efficiency; other useless light irradiating the crystal will cause the crystal to heat up. The thermal lens effect is generated, resulting in a decrease in the optical quality of the laser output and a decrease in conversion efficiency

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