Whole wind-cooling heat dissipation dual-pumping dual-crystal laser

Abstract

The invention relates to a laser crystal cooling technology of all-solid-state lasers, in particular to a whole wind-cooling heat dissipation dual-pumping dual-crystal laser, which comprises a wind-cooling heat dissipation device, a first laser crystal, a second laser crystal, a first laser crystal clamp, a second laser crystal clamp and a shell with a heat dissipation outlet, wherein the first laser crystal clamp and the second laser crystal clamp are provided with arrangement slot holes for clamping the laser crystals; the dual-pumping dual-crystal laser is characterized in that the longitudinal profile of the arrangement slot holes is rhombic, the diagonal of rhombus is in line with the C axis of laser crystal placed on the arrangement slot holes; and the appearance of the laser crystal is in match with that of the arrangement slot holes. The invention aims at designing the whole wind-cooling heat dissipation dual-pumping dual-crystal laser with good heat dissipation effect, smooth and reliable work after long time work. Compared with the prior art, the dual-pumping dual-crystal laser has the characteristics of low power consumption of the complete machine, good quality of output light beams, high speed of heat dissipation, compact structure of devices of the complete machine and the like.

Description

technical field [0001] The invention relates to a laser crystal cooling technology of an all-solid-state laser, in particular to an all-air-cooled heat-dissipating double-pump double-crystal laser. Background technique [0002] The cooling methods of laser crystals in all-solid-state lasers can be roughly divided into three methods: "liquid cooling, semiconductor cooling, and air-cooling conduction heat dissipation". [0003] Liquid cooling can achieve a better cooling effect by controlling the temperature and flow of the liquid. However, liquid cooling has a large volume and high power consumption, which is not suitable for the general trend of energy saving and emission reduction in modern industry. [0004] Semiconductor (TEC) cooling needs to add heat sink fan cooling on the basis of semiconductor cooling sheet. This method can control the cooling temperature accuracy better, but it needs to increase the temperature control circuit and other related equipment, which inc...

AI Technical Summary

Problems solved by technology

[0007] However, compared with the heat dissipation methods of liquid cooling and semiconductor refrigeration, the conventional air-cooled heat dissipation is generally poor in heat dissipation. It is relatively difficult to accurately control the heat-dissipating objects to operate at room temperature.

[0008] At present, the laser crystals used in end-pumped lasers are usually Nd:YVO4, or Nd:GdVO4 or Nd:YLF crystals. These crystals have the characteristics of polarized absorption and polarized emission. That is, a-axis cut laser The absorption coefficient of crystals for π-polarized pump light is much greater than that for σ-polarized pump light. Therefore, in order to make full use of the energy of pump light, π-polarized pumping is usually used. Therefore, the a-axis is generally used when making crystals. The method of cutting "the c-axis is parallel to the bottom surface of the laser shell" is used, but the crystal fixture design at this time can only use the upper and lower contact surfaces of the laser crystal as the two clamping surfaces to clamp the crystal, and the crystal perpendicular to the bottom surface The two sides have no heat dissipation function, and the heat dissipation effect is poor. If the laser crystal with a square longitudinal section shape is rotated 45° directly, and the four sides of the laser crystal are used as clamping surfaces, the four sides of the laser crystal can dissipate heat at the same time, but the laser At the same time, the c-axis of the crystal is also deflected by 45°, and the polarization direction of the pump light cannot be changed, which violates the requirements of its polarization absorption, so that the laser crystal cannot fully absorb, and the heat conversion of the pump light increases, and the output power of the laser If the output beam is reduced, the quality of the output beam will deteriorate; the laser beam output by the laser is also polarized light. If this method is used, in the occasion where pulse output is required, the corresponding Q-switching device must be rotated by 45° to lock the laser and operate normally. , and the Q-switching device placed at 45° will have poor stability in long-term use, and the Q-switching device placed at 45° to the bottom is prone to slight drift, which will affect the light locking effect.

Images