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A kind of crystal material, its preparation method and its application as laser crystal

A crystal material and crystal technology, applied in the field of inorganic crystal materials, can solve the problems of high equipment repair rate, uneven distribution of doping concentration, high price, and achieve the effect of high optical uniformity

Active Publication Date: 2021-06-22
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This laser characteristic is closely related to the quality of crystal growth. Since the Cr ion segregation coefficient is greater than 1, it is easy to cause uneven distribution of Cr doping concentration at the upper and lower ends when the crystal is grown by the pulling method. When used in lasers, the efficiency is low. The performance of the produced ultraviolet lasers is unstable when used in industrial applications, and the repair rate of equipment is high. Therefore, manufacturers engaged in the production of industrial lasers choose to purchase Cr, Nd: YAG crystals from the United States. The price is extremely high, resulting in Laser cost is high
[0011] Tracing back to the source, the quality of Cr,Nd:YAG crystals currently provided in my country is not too hard, the optical uniformity is not high, and it cannot meet the requirements of high-power ultraviolet lasers
According to research and analysis, the main reason for the poor quality of Cr,Nd:YAG crystals is that the optimal doping concentration and ratio of Cr and Nd ions are not clear, and the crystal growth process conditions have not been optimized.

Method used

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  • A kind of crystal material, its preparation method and its application as laser crystal
  • A kind of crystal material, its preparation method and its application as laser crystal
  • A kind of crystal material, its preparation method and its application as laser crystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Example 1 Crystalline Preparation and Crystal Growth

[0065] Accurately weigh the 4N level Cr in accordance with the proportion of the chemical formula 2 O 3 ND 2 O 3 Y 2 O 3 Alone 2 O 3 In pouring into the polytetrafluoroethylene tank, in which zirconium balls and an appropriate amount of alcohol are added to the self-made mixing machine, it is mixed in the self-made mixing machine. Push the raw material into a sheet, put the platinum crucible, place it in a normal sintering furnace, slowly warmed to a pre-sintering temperature at a certain rate; then put it in a high temperature sintering furnace, a constant temperature is sintered for a period of time, take out Samples; repeating the above pre-sintering and sintering steps until the X-ray powder diffraction is completely consistent with the XRD standard JCPDS card of the crystal to obtain a polystrial sample of the crystal material. Polycrystalline sample M1 # For a typical representative, its powder diffraction spectru...

Embodiment 2

[0075] Samples of the sample obtained in Example 2 Determination

[0076] From Cr, Nd: YAG block crystals, several dimensions are 5.0 × 5.0 × 1.0mm 3 Crystal sheet, performing spectral performance test.

[0077] The results show that the absorption spectrum of the sample shows Cr 3+ ND 3+ Features absorption peaks, peak wavelengths are 355, 432, 531, 589, 749, 808, 886, 1874 and 2327 nm, wherein absorption of peak wavelength is 432 nm and 589 nm corresponds to CR. 3+ : 4 A 2 → 4 T 1 CR 3+ : 4 A 2 → 4 T 2 Jump, the rest of the peak wavelength absorption belt is ND 3+ The intrinsic absorption. CR has a good sensitivity to ND, enhances the absorption of the crystal on the pump light, and because the absorption band is relatively large, and the absorption band is relatively wide, it matches the commercial blue semiconductor pump source, making several samples The crystal is ideal for laser experiments for commercial 450nm Blu-ray diode pumps.

[0078] The sample temperature fluorescen...

Embodiment 3

[0085] Application of Samples obtained in Example 3 in laser devices

[0086] Take samples S1 separately # ~ S5 # The processing is 3 mm × 3 mm × (5 ~ 10) mm, and the crystal is 3 mm × 3 mm polishing, and is applied to the laser device. Apparatus of the laser device Figure 4 As shown, the crystal sample is placed in a sealed copper tube, and the pump source used is 450 nm Blu-ray LD. The terminal pump mode, the nonlinear crystal selects the LBO crystal, the input mirror is a concave mirror having a diameter of 200 mm, at 450 nm high Transparent, high in 300 ~ 400 nm. The coupling mirror is a plane mirror, and the transmittance at 344 nm at the laser wavelength is 0.5%, 1%, 2%, 3%, and 4%. The laser spectrum is measured by a laser wavelength meter, and the model is 821b-Ir, Bristol, and the laser power is measured by a power meter, and the model is LPE-1B.

[0087] The result is displayed, the sample S1 is applied separately. # ~ S5 # The laser device capable of realizing a 344 nm ...

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PUM

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Abstract

The application discloses a crystal material, the chemical formula is Nd x Cr y Y 3‑x al 5‑y o 12 , where, 0.006≤x≤0.008, 0.0045≤y≤0.0055, 1.2≤x / y≤1.6; Nd 3+ Substituting Y in the crystal 3+ Lattice, Cr 3+ Substituting Al in the crystal 3+ grid position. Cr has a good sensitization effect on Nd, which enhances the crystal's absorption of pump light. The absorption intensity is relatively large, and the absorption band is relatively wide, which matches the commercial blue light semiconductor pump source. Based on this crystal, the 344nm ultraviolet band laser can be realized by adopting the technical scheme of blue light LD pumping + frequency doubling.

Description

Technical field [0001] The present application relates to a new type of laser crystalline material, the preparation method and application thereof, belonging to the field of inorganic crystal materials. Background technique [0002] UV laser has a wide range of application prospects in the fields of optical data storage, micromachining, photolithography, photochemistry, photobiology, with a short wavelength of ultraviolet laser processing with short wavelengths, and it is directly The chemical bonds that disrupt the connection substance atomic component are "cold" processing, and do not produce heating of the periphery, and thus becomes an ideal tool for processing thin rubber and plastic, which also makes it a lot of substances such as metal, semiconductors. , Cutting and mission becomes possible, and because it has good focus performance and higher resolution, becomes photovoltaic, 3D printing, high-precision circuit board, solar cell, LED conductive film processing, wafer mark...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/28C30B15/36C30B28/02
CPCC30B15/36C30B28/02C30B29/28
Inventor 王燕涂朝阳李坚富游振宇朱昭捷
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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