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Chromium-doped strontium aluminum niobate tunable laser crystal as well as preparation method and application thereof

A laser crystal, chromium doping technology, applied in lasers, crystal growth, laser parts and other directions, can solve the problems of poor wavelength range, insufficient absorption coefficient and low quantum efficiency of tunable laser crystals, and achieve a mature and stable growth process. , the effect of high emission intensity and simple preparation of raw materials

Inactive Publication Date: 2020-02-04
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: the wavelength range of the current tunable laser crystal is not good, the quantum efficiency is low, and the technical problem of the absorption coefficient is insufficient, and a chromium-doped aluminum strontium niobate tunable laser crystal and its preparation are provided method

Method used

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  • Chromium-doped strontium aluminum niobate tunable laser crystal as well as preparation method and application thereof
  • Chromium-doped strontium aluminum niobate tunable laser crystal as well as preparation method and application thereof
  • Chromium-doped strontium aluminum niobate tunable laser crystal as well as preparation method and application thereof

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Experimental program
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Embodiment 1

[0025] This embodiment provides a method for preparing a chromium-doped aluminum strontium niobate tunable laser crystal, and the specific steps are as follows:

[0026] Step 1: Obtain Cr by high-temperature solid-phase method 3+ :Sr 2 AlNbO 6 (Cr 3+ The doping concentration is 0.2at.%) Raw material: the initial raw material is Al 2 o 3 , SrCO 3 , Nb 2 o 5 and Cr 2 o 3 , use the metering ratio of the following chemical equation to weigh the materials; use an agate mortar to grind and mix the initial raw materials evenly, then put them into a 50×50mm corundum crucible, place them in a muffle furnace, and heat up to 800°C for pre-sintering. Keep it warm for 8 hours, take it out, grind it again evenly, and heat it for 16 hours at 1550°C for the second sintering, and finally get Cr 3+ :Sr 2 AlNbO 6 raw material;

[0027] 4SrCO 3 +Nb 2 o 5 +0.002Cr 2 o 3 +0.998Al 2 o 3 →2Sr 2 al 0.998 Cr 0.002 NbO 6 +4CO 2 ↑

[0028] Step 2: Grind the synthesized raw mater...

Embodiment 2

[0031] This embodiment provides a method for preparing a chromium-doped aluminum strontium niobate tunable laser crystal, and the specific steps are as follows:

[0032] Step 1: Obtain Cr by high-temperature solid-phase method 3+ :Sr 2 AlNbO 6 (Cr 3+ The doping concentration is 1.5at.%) raw material, the initial raw material is Al 2 o 3 , SrCO 3 , Nb 2 o 5 and Cr 2 o 3 , use the metering ratio of the following chemical formula to weigh the materials, use an agate mortar to grind and mix the initial raw materials evenly, then put them into a 50×50mm corundum crucible, place them in a muffle furnace, and heat up to 900°C for pre-sintering. Keep it warm for 8 hours, take it out, grind it again evenly, and heat it for 19 hours at 1550°C for the second sintering, and finally get Cr 3+ :Sr 2 AlNbO 6 raw material;

[0033] 4SrCO 3 +Nb 2 o 5 +0.015Cr 2 o 3 +0.985Al 2 o 3 →2Sr 2 al 0.985 Cr 0.015 NbO 6 +4CO 2 ↑

[0034] Step 2: Grind the synthesized raw materi...

Embodiment 3

[0036] This embodiment provides a method for preparing a chromium-doped aluminum strontium niobate tunable laser crystal, and the specific steps are as follows:

[0037] Step 1: Obtain Cr by high-temperature solid-phase method 3+ :Sr 2 AlNbO 6 (Cr 3+ The doping concentration is 5.0at.%) raw material, the initial raw material is Al 2 o 3 , SrCO 3 , Nb 2 o 5 and Cr 2 o 3 , use the metering ratio of the following chemical equation to weigh the materials, use an agate mortar to grind and mix the initial raw materials evenly, then put them into a 50×50mm corundum crucible, place them in a muffle furnace, and heat up to 1000°C for pre-sintering. Keep it warm for 8 hours, take it out, grind it again evenly, and heat it for 24 hours at 1550°C for the second sintering, and finally get Cr 3+ :Sr 2 AlNbO 6 raw material;

[0038] 4SrCO 3 +Nb 2 o 5 +0.05Cr 2 o 3 +0.95Al 2 o 3 →2Sr 2 al 0.95 Cr 0.05 NbO 6 +4CO 2 ↑

[0039] Step 2: Grind the synthesized raw material...

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Abstract

The invention relates to a chromium-doped strontium aluminum niobate tunable laser crystal and a preparation method thereof. A chemical formula of the crystal material is Cr<3+>:Sr2AlNbO6. The Cr<3+>:Sr2AlNbO6 crystal belongs to a cubic system and has a space group structure; a melting point of the Cr<3+>:Sr2AlNbO6 is 1790 DEG C, the Cr<3+>:Sr2AlNbO6 belongs to congruent melting compounds, so thatthe crystal with a large size and higher optical uniformity can be grown by a pulling process; the crystal growth parameters of the Cr<3+>:Sr2AlNbO6 are as follows: the rotation speed of a seed rod is 10-55 rpm, and the pulling rate is 1-3.5 mm / h, and after the crystal growth is completed, cooling is performed to room temperature at a rate of 10-65 DEG C / h to grow the Cr<3+>:Sr2AlNbO6 crystal, wherein the Cr<3+> doping concentration is 0.1-10.0 at%; and the Cr<3+>:Sr2AlNbO6 crystal has a tunable range from 730 nm to 850 nm, and can be used as a tunable laser crystal.

Description

technical field [0001] The invention belongs to the field of optoelectronic functional materials, and in particular relates to a laser crystal material which can be applied to tunable lasers and a preparation method thereof. Background technique [0002] In recent years, solid-state lasers with laser crystals as the core of their work have been widely used in various fields such as national defense, military, transportation, medical care, and scientific research due to their compact structure, stable operation, easy portability, and high power density. Therefore, laser crystals have become one of the research hotspots, especially with Cr 3+ Laser crystal materials as activated ions have attracted more and more attention from researchers. [0003] Since the researchers used red LD-pumped Cr 3+ : LSAF crystal successfully realized the tunable laser output of 830~915nm (Laperle P., Snell K J., Galarneau P., CLEO.1995, P16). Since then, a series of new tunable laser crystals ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/30C30B15/00H01S3/16
CPCC30B15/00C30B29/30H01S3/1623H01S3/1671
Inventor 张彦袁军平徐家跃田甜储耀卿申慧罗宽宽黄礼武余枭
Owner SHANGHAI INST OF TECH
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