Temperature control device for laser resonant cavity

Abstract

The invention provides a temperature control device for a laser resonant cavity. The temperature control device comprises a furnace body placed in the variable frequency laser resonant cavity and a base; a crystal carrier is arranged at the top of the furnace body; nonlinear crystal is pressed by arranging a wedge-shaped sliding block on the side of the crystal carrier and arranging an elastic pressing plate at the top of the crystal carrier, so that the mechanical stability of the crystal is ensured; and the overall structure is a sandwich structure, the furnace body is in the center, a heat insulation material is filled on four sides, and the exposed portion of the furnace body is only a light transmission portion, so that heat exchange between the furnace body and the outside is reduced, and the thermal balance of the crystal is ensured. By adopting a low-power heating fuse, the heating speed is slowed down, temperature oscillation caused by temperature oversaturation is avoided, and the size of the furnace body is reduced; and the front area of the furnace body is matched with the crystal surface, so that most of the heat is transferred to the crystal. The temperature of the crystal can be accurate to 0.05 DEG C upon test. The heat insulation layer is subjected to light transmission treatment, so that the device is prevented from shading light in the folded resonant cavity, and the device is applicable to multiple laser resonant cavities.

Description

technical field [0001] The invention relates to the field of nonlinear optical laser frequency conversion, in particular to a temperature control device placed in a frequency conversion laser cavity for fixing and controlling the temperature of a laser frequency conversion crystal. Background technique [0002] In nonlinear optics, the nonlinear crystal is the core device of laser frequency conversion. The laser level passes through the crystal to convert the wavelength of the laser, and controls the light to pass through different positions of the crystal and the corresponding temperature to achieve frequency conversion output of different wavelength lasers. Generally, temperature changes At 1 degree Celsius, the emitted laser wavelength will change by 0.15nm. Therefore, in the laser frequency conversion technology, a temperature control device is needed to fix and support the nonlinear crystal and perform temperature control on the crystal. The positional deformation and ...

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Problems solved by technology

[0003] The temperature control device currently on the market has a large furnace body and is not suitable for a variety of laser resonators. The crystal is fixed in a single way and is not suitable for a variety of thickness crystals. The mechanical stability is poor and it is easily affected by temperature deformation.

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