High-power LD pumping thulium laser module

Abstract

The invention discloses a high-power LD (Laser Diode) pumping thulium laser module. The high-power LD pumping thulium laser module comprises a laser crystal bar, a quartz socket tube, an LD array, a light guiding structure and a crystal end part heating sleeve which are mounted in a stainless steel support structure, wherein the laser crystal bar is a Tm:YAG bonding crystal bar; the lengths of non-doped parts at two ends of the laser crystal bar are not less than 35mm; the lengths of doping parts are 60mm; the non-doped parts at the two ends of the laser crystal bar are sealed, positioned and mounted in crystal mounting holes; a water path for cooling the LD array is arranged inside a copper matrix of the light guiding structure; and a low-temperature cooling water path for cooling the Tm:YAG bonding crystal bar is also arranged in the support structure. According to the laser module, high-low-temperature cooling of an LD pumping source and a thulium laser crystal can be conveniently realized; the damage to the device caused by water vapor condensation due to low temperature of an end face of an optical device on the basis that the laser efficiency is increased is avoided; and meanwhile, a thermal lens effect is reduced and the long-time reliable operation is ensured.

Description

technical field [0001] The invention relates to an LD-pumped high-power thulium laser module, in particular to an LD-pumped high-power thulium laser module for assembling a high-power Tm:YAG laser, and belongs to the technical field of laser devices. Background technique [0002] Thulium-doped yttrium aluminum garnet laser (Tm:YAG solid-state laser) is a very important laser light source, which emits a mid-infrared laser with a wavelength of 2.01 μm in the strong absorption band of water vapor molecules, carbon dioxide molecules and liquid water, and can pass through Quartz optical fiber conduction can realize high-power laser emission of several hundred watts, and has very broad application prospects in remote sensing and medical fields (especially minimally invasive surgery). However, since the temperature of the Tm:YAG laser crystal has a great influence on the laser efficiency, the laser efficiency decreases rapidly with the increase of the crystal temperature, so good c...

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Problems solved by technology

[0003] In summary, the existing thulium laser and the high-power Tm:YAG laser disclosed in the above two patents have the disadvantage that the laser module of the core device cannot prevent the LD array light-emitting surface and the Tm:YAG laser crystal optical surface from being damaged. Condensation of water vapor reduces the reliability of the laser; in particular, the laser cannot work at a lower temperature, which greatly reduces the laser efficiency

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