Solar-pumped composite crystal with high absorption efficiency and radiating performance and preparation thereof

Abstract

The invention provides a solar-pumped composite crystal with high absorption efficiency and radiating performance and preparation thereof; the composite crystal includes a neodymiumx yttrium aluminum garnet doped crystal layer and a neodymiumx yttrium aluminum garnet crystal layer; the neodymiumx yttrium aluminum garnet crystal layer is located at the outside of the neodymiumx yttrium aluminum garnet doped crystal layer. The preparation method is to bond the neodymiumx yttrium aluminum garnet crystal layer with the neodymiumx yttrium aluminum garnet doped crystal layer. By using the high heat conductivity of non-doped YAG crystal, the radiating performance of a laser crystal is promoted; the radiating area of the laser working crystal is enlarged by a composite structure; the surface radiating balance degree of the Nd: YAG crystal is improved by bonding the solid material; meanwhile, the utilization efficiency of the pumped light is effectively improved. The composite crystal can be applied to the solar pump, in particular to the laser system design of the solar pump; the radiating ability of the solar pump system and the pump light utilization efficiency are improved; the temperature balance function can further improve the light beam quality of the output laser, and expand the using scale of the light pump laser.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a sunlight-pumped composite crystal with high absorption efficiency and heat dissipation performance and its preparation. Background technique [0002] In the sunlight-pumped laser system, the thermal effect of the laser working crystal is the main reason why the output power cannot be increased. On the one hand, since the sunlight spectrum is much wider than the effective absorption spectrum of the laser working crystal, a large amount of sunlight energy absorbed by the laser working crystal will be converted into internal heat. On the other hand, in the current mainstream sunlight-pumped laser crystals, such as neodymium-doped yttrium-aluminum garnet (Nd:YAG) crystals, due to the uneven energy absorption in the incident direction of the pump light, the crystal temperature gradient effect and the end-face deformation thermal lens, Effects such as thermally induced birefringence ...

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Problems solved by technology

However, this description only emphasizes that the isolated crystal itself does not generate heat, but the isolated crystal itself has a certain thermal conductivity, and the thermal conductivity is on the same order of magnitude as that of the doped crystal, so its thermal conductivity is strong, and the effect of complete heat insulation cannot be achieved.

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