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Dysprosium doped calcium strontium molybdate green laser crystal and preparation method thereof

A technology of laser crystal and calcium molybdate, applied in the field of materials science, can solve the problems of difficult operation of conversion laser, and achieve the effect of remarkable technological progress, stable growth process and high conversion efficiency

Inactive Publication Date: 2019-03-05
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above technical problems in the prior art, the present invention provides a dysprosium-doped calcium strontium molybdate green laser crystal and a preparation method thereof. The dysprosium-doped calcium strontium molybdate green laser crystal and its The preparation method mainly solves the technical problem that the laser crystal material in the all-solid-state green laser used as an LD pump in the prior art is difficult to operate at room temperature

Method used

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  • Dysprosium doped calcium strontium molybdate green laser crystal and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1 adopts 75at.%K 2 Mo 2 o 7 and 25 at.% MoO 3 The mixture is flux, and the growth doping concentration is 1at.%Dy 3+ Dy 3+ :Sr 2 CaO 6 laser crystals.

[0021] Growth material by Sr 2 CaO 6 : Flux = 0.45:0.55 (molar ratio) preparation, mixed with Dy of 1at% 3+ion. Using the molten salt top seed method, in a Φ60×50mm platinum crucible, the growth temperature is between 787°C→750°C, with a cooling rate of 1.5°C / day and a crystal rotation speed of 30 rpm, a crystal with a size of 30×16×20mm 3 of high quality Dy 3+ :Sr 2 CaO 6 crystals. The analysis by ICP (plasma emission spectrometry) showed that Dy in the crystal 3+ The ion content is 1.08 at.%.

Embodiment 2

[0022] Embodiment 2 adopts 75at.%K 2 Mo 2 o 7 and 25 at.% MoO 3 A mixture of fluxes, the growth of Dy 3+ Dy with an ion concentration of 5 at.% 3+ :Sr 2 CaO 6 laser crystals.

[0023] The growth material is Sr 2 CaO 6 : Flux=0.35:0.65 (molar ratio), mixed with 5at.% Dy 3+ ion. Using the molten salt top seed crystal method, in a Φ60×50mm platinum crucible, the growth temperature is 775°C→745°C, with a cooling rate of 1°C / day and a crystal rotation speed of 25 rpm, a crystal with a size of 25× 20×13mm 3 Dy 3+ :Sr 2 CaO 6 crystals. According to ICP (plasma emission spectrometry) analysis, Dy in the crystal 3+ The ion content is 5.1 at.%.

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Abstract

The invention discloses a dysprosium-doped strontium calcium molybdate green laser crystal. The molecular formula for the crystal is Dy<3+>:Sr2CaMoO6, which belongs to an orthorhombic system and a Pmm2 space group, crystal cell parameters are alpha=beta=gamma=90 DEG, a=8.1513 angstrom, b=5.7416 angstrom, c=5.8385 angstrom and Z=2. The invention also provides a method of preparing the above dysprosium-doped strontium calcium molybdate green laser crystal. A molten salt top-seeded solution growth method is adopted; K2Mo2O7-MoO3 serves as a fluxing agent; the growth parameters are: a cooling rate of 0.5 to 3 DEG C per day, growth temperature of 750 to 790 DEG C, and a rotation speed of 5 to 30 revolutions per minute; the Dy<3+>:Sr2CaMoO6 crystal grows; and the doping concentration of Dy<3+> is 1at.% to 15at.%. The crystal of the invention can be used as a laser working material in a solid-state laser, a flash or a laser diode is used as a pumping source, and green laser is excited and generated and outputted.

Description

technical field [0001] The invention belongs to the field of materials science, and relates to an optoelectronic functional material, especially a laser crystal material used as a working substance in an LD-pumped all-solid-state green laser, specifically a dysprosium-doped calcium strontium molybdate green Optical laser crystal and its preparation method. Background technique [0002] LD-pumped all-solid-state laser (DPSSL) has attracted the attention of researchers due to its advantages of high efficiency, small size, long life, and good beam quality, and has become one of the hot spots in laser technology research. Among all solid-state visible light lasers, green lasers have achieved the most rapid development due to their wide application in medical and health care, precision machining, marine exploration, military defense, information storage, lidar, and high-definition display. Hot spot of laser research. [0003] At present, the main ways to achieve green laser out...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/16C30B9/12C30B29/32
CPCC30B9/12C30B29/32H01S3/1675
Inventor 张彦王洪超李雨萌徐家跃李杰夏土良
Owner SHANGHAI INST OF TECH
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