Preparation method and application of processing-free lamellar laser crystal

A sheet laser, processing-free technology, applied in crystal growth, chemical instruments and methods, single crystal growth, etc., can solve the problems of exceeding the cost of the material itself, high processing cost, high precision requirements, etc., to achieve production time and production Cost reduction, low cost, high optical quality effect

Inactive Publication Date: 2018-12-28
QINGDAO UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the preparation process of laser crystals is generally as follows: according to the characteristics of different crystals, adopt corresponding growth methods (such as pulling method, flux method, crucible drop method, etc.) The thickness is cut and shaped, and then rough polishing, fine polishing, coating, and finally can be used. The whole processing process is cumbersome, time-consuming, and costly. It can be said that the processing cost occupies an important proportion in the price of laser crystal devices, sometimes even More than the cost of the material itself, and for thin-sheet crystal devices, the precision requirements are high, the risk of breaking is high, the yield is low, and the material loss is high (taking the current commonly used processing equipment as an example, cutting a knife will lose about 0.25mm thick crystal ), the processing cost has remained high for a long time

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  • Preparation method and application of processing-free lamellar laser crystal
  • Preparation method and application of processing-free lamellar laser crystal
  • Preparation method and application of processing-free lamellar laser crystal

Examples

Experimental program
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Effect test

Embodiment 1

[0016] This example prepares doping 1.2at.%, size is 3×2×0.6mm 3 Nd:YPO 4 Primary crystal flakes, the specific preparation process is: weigh 2.6 grams of Y 2 o 3 , 80 g PbHPO 4 and 0.0234 g Nd 2 o 3 Put the mixture into a platinum crucible, first raise the temperature from room temperature to 1250°C as soon as possible and keep it warm for 24 hours. After the solution is stable, it begins to cool down and grow at a cooling rate of 1°C / h; room temperature, and finally soaked in boiling concentrated nitric acid (mass fraction 65%-68%) for 2 days to separate the crystal from the flux to obtain a flaky laser crystal with high surface parallelism, flatness and smoothness.

[0017] The Nd that this embodiment will prepare: YPO 4 After the primary crystal thin slice is directly placed in a 1.06 micron laser cavity, an output power of more than 2W can be obtained, and the slope efficiency and light-to-light conversion efficiency reach 56.4% and 53% respectively; after being dire...

Embodiment 2

[0019] The processing-free neodymium-doped 1.2at.% yttrium orthophosphate crystal (YPO 4 ) is used for 1.06 micron continuous wave all-solid-state lasers, and the arrangement order of components along the optical path is: pump source, laser focusing system, pump end mirror, laser crystal, output end mirror, where the laser crystal is a processing-free neodymium-doped Rare earth orthophosphate crystal with a crystal thickness of 0.1-2mm; the pump source is a fiber-coupled output semiconductor laser with a central wavelength of 808nm; the pump end mirror is coated with a medium that is highly transparent to 800-815nm light and highly reflective to 1040-1080nm light film; the output end mirror is coated with a dielectric film that partially transmits 1040-1080nm light, the transmittance T can vary from 0.5% to 60%, and the optimized transmittance is 5% to 20%; the pump end mirror Both ends of the laser crystal are very close to the output end mirror. The pump light emitted by the...

Embodiment 3

[0022] In this embodiment, 1.2at.% yttrium orthophosphate crystal (YPO 4 ) is used for 1.34 micron continuous wave all-solid-state lasers, and the arrangement order of the components along the optical path of the all-solid-state laser is: pump source, laser focusing system, pump end mirror, laser crystal, output end mirror, and the laser crystal is free of processing Neodymium-doped rare earth orthophosphate crystal with a thickness of 0.1-2mm; the pump source is a fiber-coupled output semiconductor laser with a central wavelength of 808nm; - 1.36 light high reflective dielectric film; the output mirror is coated with a dielectric film that is highly transparent to 1040-1080nm light and partially transparent to 1.32-1.36 light. The transmittance T can vary from 0.5% to 60%, optimized The transmittance is 2% to 10%. The pump end mirror and the output end mirror are very close to the two ends of the laser crystal. The pump light emitted by the half pump source is irradiated on t...

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Abstract

The invention belongs to the technical field of laser materials and laser, and relates to a preparation method and an application of a processing-free lamellar laser crystal. Re2O3 and PbHPO4 are mixed and put into a platinum crucible, wherein Re is Nd and Y, or Nd and Lu. When the crystal grows, the temperature is firstly raised to 1250 DEG C from room temperature and kept for 24 hours, cooling growth is started after the solution is stable, and a power supply of the platinum crucible is turned off after the temperature is reduced to 900 DEG C, so that the crystal is naturally cooled to roomtemperature, soaked in boiling concentrated nitric acid for 2 days finally and separated from a fluxing agent to obtain a lamellar laser crystal; the prepared lamellar laser crystal has high doping concentration, large gain, long fluorescence life, high thermal conductivity and high optical damage threshold, and laser output with low pumping threshold, high efficiency and high power is convenientto obtain; besides, the laser crystal can be conveniently combined with a passive Q-switching element or a nonlinear optical element, and accordingly, pulsed or visible and ultraviolet laser is obtained, and the laser crystal is miniaturized, low in cost, long in service life and convenient to carry and use, and has wide application prospect.

Description

Technical field: [0001] The invention belongs to the field of laser materials and laser technology, and relates to a preparation method and application of a processing-free flaky laser crystal. Background technique [0002] As one of the greatest inventions of the 20th century, laser technology has developed rapidly since its appearance and has had an important impact on contemporary society. The development of laser radar, laser weapons, laser processing, laser medical treatment and other technologies has put forward new requirements for laser materials, which has promoted people's continuous exploration of new laser materials. Laser crystal is a common solid-state laser medium, which has a very wide range of applications. The composition of laser crystals mainly includes doped rare earth ions and matrix materials. To obtain high efficiency and high power output of solid-state lasers, the performance of laser crystals is very important. At present, the preparation proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B9/06C30B29/14
CPCC30B9/06C30B29/14
Inventor 钟德高滕冰王正平张栩朝朱敏冯圆权孔惠琳
Owner QINGDAO UNIV
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