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Chromium-doped calcium aluminum niobate tunable laser crystal and preparation method thereof

A laser crystal and niobic acid technology, applied in the field of materials science, can solve the problems of tunable wavelength range, poor absorption coefficient performance, etc., and achieve the effects of high emission intensity, good physical and chemical properties, and stable growth process

Active Publication Date: 2018-08-21
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a chromium-doped aluminum calcium niobate tunable laser crystal and a preparation method thereof, and the chromium-doped aluminum calcium niobate tunable laser crystal and its preparation method To solve the technical problems of tunable wavelength range and poor absorption coefficient performance of tunable laser crystals in the prior art

Method used

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  • Chromium-doped calcium aluminum niobate tunable laser crystal and preparation method thereof
  • Chromium-doped calcium aluminum niobate tunable laser crystal and preparation method thereof
  • Chromium-doped calcium aluminum niobate tunable laser crystal and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Preparation of Cr by High Temperature Solid Phase Method 3+ : Ca 2 AlNbO 6 (Cr 3+ The doping concentration is 0.3at.%), and the raw material used is analytically pure Al 2 o 3 , CaCO 3 , Nb 2 o 5 and Cr 2 o 3 . Then weigh the materials according to the proportion of the following chemical reaction formula, grind and mix them evenly with an agate mortar, put them into a 50×50mm alumina crucible, then place them in a muffle furnace, heat up to 900°C for pre-sintering, and keep warm for 8 Hours, take it out and re-grind it to make it evenly mixed. The second sintering is kept at 1550°C for 18 hours, and finally Cr 3+ : Ca 2 AlNbO 6 raw material.

[0029] 4CaCO 3 +Nb 2 o 5 +xCr 2 o 3 +(1-x)Al 2 o 3 →2Ca 2 Al 1-x Cr x NbO 6 +4CO 2 ↑

[0030] Grind and mix the synthesized raw materials evenly, put them into a Φ55mm×30mm iridium crucible, place them in a pulling furnace, and place them in a protective gas N 2 Under certain conditions, the growth temp...

Embodiment 2

[0033] Preparation of Cr by High Temperature Solid Phase Method 3+ : Ca 2 AlNbO 6 (Cr 3+ The doping concentration is 1.2at.%), and the raw material used is analytically pure Al 2 o 3 , CaCO 3 , Nb 2 o 5 and Cr 2 o 3 . Then weigh the materials according to the proportion of the following chemical reaction formula, grind and mix them evenly with an agate mortar, put them into a 50×50mm alumina crucible, then place them in a muffle furnace, heat up to 900°C for pre-sintering, and keep warm for 8 Hours, take it out and re-grind it to make it evenly mixed, and heat it for 15 hours under the condition of 1550°C for the second sintering, and finally get Cr 3+ : Ca 2 AlNbO 6 raw material.

[0034] 4CaCO 3 +Nb 2 o 5 +xCr 2 o 3 +(1-x)Al 2 o 3 →2Ca 2 Al 1-x Cr x NbO 6 +4CO 2 ↑

[0035] Grind and mix the synthesized raw materials evenly, put them into a Φ55mm×30mm iridium crucible, place them in a pulling furnace, and place them in a protective gas N 2 Under cer...

Embodiment 3

[0037] Preparation of Cr by High Temperature Solid Phase Method 3+ : Ca 2 AlNbO 6 (Cr 3+ The doping concentration is 5.0at.%), and the raw material used is analytically pure Al 2 o 3 , CaCO 3 , Nb 2 o 5 and Cr 2 o 3 . Then weigh the materials according to the proportion of the following chemical reaction formula, grind and mix them evenly with an agate mortar, put them into a 50×50mm alumina crucible, then place them in a muffle furnace, heat up to 900°C for pre-sintering, and keep warm for 8 After taking it out, grind it again to make it evenly mixed, and then sinter it for 12 hours under the condition of 1550°C, and finally get Cr 3+ : Ca 2 AlNbO 6 raw material.

[0038] 4CaCO 3 +Nb 2 o 5 +xCr 2 o 3 +(1-x)Al 2 o 3 →2Ca 2 Al 1-x Cr x NbO 6 +4CO 2 ↑

[0039] Grind and mix the synthesized raw materials evenly, put them into a Φ55mm×30mm iridium crucible, place them in a pulling furnace, and place them in a protective gas N 2 Under certain conditions, ...

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Abstract

The invention provides a chromium-doped calcium aluminum niobate tunable laser crystal. The chemical formula of the crystal material is: Cr<3+>:Ca2AlNbO6. The crystal belongs to monoclinic system andhas a P21 / c space group structure, and has the following cell parameters: a=5.378angstrom, b=5.4154angstrom, c=7.6248angstrom, beta=89.970(2)degree, and Z=2. The invention also provides a preparationmethod of the above-mentioned tunable laser crystal. The method includes: adopting CaCO3, Al2O3, Nb2O5 and Cr2O3 as the initial raw materials, conducting solid-phase synthesis and double sintering toprepare Cr<3+>:Ca2AlNbO6 raw material, and subjecting the Cr<3+>:Ca2AlNbO6 raw material to czochralski growth into a large size and high optical quality crystal. The crystal provided by the inventioncan be used as a tunable laser crystal, and the tunable range is 600-1000nm.

Description

technical field [0001] The invention belongs to the field of materials science, and relates to an optoelectronic functional material, in particular to a chromium-doped calcium aluminum niobate tunable laser crystal and a preparation method thereof. Background technique [0002] In recent years, tunable solid-state lasers have been widely used in scientific research, industry, aerospace and other fields, so they have attracted more and more attention from scientists, especially the Cr 3+ Laser crystal material as activated ions. [0003] Some researchers used red LD pumped Cr 3+ : LSAF crystal has successfully realized the tunable laser output of 830~915nm. Since then, many tunable laser crystals have been reported, such as Cr 3+ :KAl(MoO 4 ) 2 、Cr 3+ :MgMoO 4 、Cr 3+ :LiSrAlF 6 etc. At this stage, due to various reasons, many tunable laser crystals are limited to laboratory tools and cannot be used in industrial production and application. Ti 3+ :Al 2 o 3 (titani...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/30C30B15/00H01S3/16
CPCC30B15/00C30B29/30H01S3/1671
Inventor 张彦袁军平王洪超徐家跃罗宽宽向迪李星亮
Owner SHANGHAI INST OF TECH
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