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

Abstract

The invention discloses a spectral body capable of improving laser photoelectric conversion efficiency and optical quality. The spectral body refers to a spectrum isolation plate, which is arranged between a xenon lamp and a crystal, and is made of cerium-doped quartz glass. One surface of the spectrum isolation plate is plated with a total-reflection film for isolating infrared light with a wavelength from 0.87 to 1.2 mu m. The other surface of the spectrum isolation plate is plated with a layer of an optical substance used for absorbing light with a wavelength from 0.6 to 0.7 mu m and capable of converting the light into light with a wavelength from 0.8 to 0.9 mu m. The spectral body adopts a spectrum conversion method according to absorption features of the YAG laser crystal, increases the component of spectra useful for the laser crystal, isolates the component of harmful bands, improves the efficiency of laser photoelectric conversion and improves the optical quality of laser output. Through the two conversions, the laser efficiency can be increased by 40% or more, the thermal lens effect of the crystal is reduced, the beam quality is significantly improved, and the effect is remarkable for forming high-power laser devices.

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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