A polygonal crystal for solid-state lasers and all-solid-state lasers

A technology of solid-state lasers and laser crystals, applied in the direction of lasers, laser components, and the structure/shape of active media, can solve problems such as uneven pumping of slab-shaped crystals, difficult coating process, and poor quality of laser beams. Achieve the effects of reducing crystal thermal effect, avoiding self-excited oscillation, and absorbing uniformly

CN109980496BActive Publication Date: 2020-09-18BEIJING RES INST OF TELEMETRY +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-09-18

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Abstract

A polygonal crystal for a solid laser comprises a laser crystal 1 and bonded crystals 2 located at both ends of the laser crystal 1, wherein the laser crystal 1 and the bonded crystals 2 have regularly pentagonal cross sections; the laser crystal 1 uses one of a neodymium-doped yttrium lithium fluoride crystal, a thulium-doped yttrium lithium fluoride crystal, a thulium-holmium-codoped yttrium lithium fluoride crystal, and a holmium-doped yttrium lithium fluoride crystal; the bonded crystals 2 are yttrium lithium fluoride crystals. The polygonal crystal and an all-solid-state laser of the invention use the regularly pentagonal laser crystal and the bonded crystals made of the yttrium lithium fluoride material, suppress the generation of self-oscillation in the crystal to the utmost extentby using side pumping, and realize high-energy high-efficiency laser output.
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Description

technical field

[0001] The invention relates to a polygonal crystal used for a solid-state laser and an all-solid-state laser, belonging to the technical field of solid-state lasers. Background technique

[0002] High-energy and high-efficiency laser diode-pumped all-solid-state lasers are widely used in space lidar, space photoelectric countermeasures, and laser medical treatment. One of the research focuses and hot spots of all-solid-state lasers is how to improve the laser output energy and conversion efficiency. One of the important factors restricting the development of high-energy and high-efficiency all-solid-state lasers is the self-oscillation effect of solid-state gain crystals, which leads to the fact that the output energy cannot be increased after reaching a certain level. Solid gain medium refers to the material that can generate stimulated radiation. Common gain mediums include neodymium doped yttrium aluminum garnet crystal (Nd:YAG), thulium doped yttrium al...

Examples

Embodiment

[0044] A polygonal crystal is used in high-energy all-solid-state lasers, and the polygonal crystal specifically includes the following components: a laser crystal 1 and a bonded crystal 2 .

[0045] The laser crystal 1 is a laser crystal whose substrate is yttrium lithium fluoride (YLF) crystal, and the laser crystal 1 is specifically selected from one of the following crystals: neodymium-doped yttrium lithium fluoride (Nd:YLF) crystal, thulium-doped yttrium fluoride Lithium (Tm:YLF) crystal, thulium holmium co-doped yttrium lithium fluoride (Tm:Ho:YLF) crystal, holmium doped yttrium lithium fluoride (Ho:YLF) crystal.

[0046]The regular pentagonal cross-section design of the laser crystal 1 can prevent the sides of the laser crystal 1 from forming an oscillation cavity and weaken the self-excited oscillation. Both ends of the laser crystal 1 are bonded to a bonded crystal 2;

[0047] Both the laser crystal 1 and the bonded crystal 2 are cut along the a-axis of the crystal, ...