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Single crystal LiGa3Te5 as well as preparation method and application thereof

A single crystal and crystal technology, applied in the field of LiGa3Te5 single crystal compound, can solve the problem of no crystal application

Inactive Publication Date: 2011-02-02
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, there is no information about bulk LiGa available for crystal physical testing. 3 Te 5 crystals, and nothing about LiGa 3 Te 5 Reports on crystal applications

Method used

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  • Single crystal LiGa3Te5 as well as preparation method and application thereof
  • Single crystal LiGa3Te5 as well as preparation method and application thereof
  • Single crystal LiGa3Te5 as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1: LiGa 3 Te 5 Single crystal growth

[0024] (1) First, use the "Two-step synthesis method of chalcogenide polycrystalline raw materials" published by CN101671847 to obtain LiGa with a stoichiometric ratio of Li:Ga:Te=1:3:5 3 Te 5 Polycrystalline raw materials.

[0025] (2) LiGa with crucible descending method 3 Te 5 For the growth of single crystals, the growth equipment is "Multiple Compound Infrared Crystal Growth Device" published by CN101323968B. The specific steps are as follows: First, strictly clean and dry the quartz tube and crucible for later use, and accurately weigh the LiGa 3 Te 5 30 grams of polycrystalline raw materials are put into a crucible and sealed in a quartz tube, heated to 200 ℃ ~ 300 ℃ to vacuum, when the vacuum degree in the quartz tube reaches 10 -3 ~10 -4 At Pa, the quartz tube is sealed with a hydrogen-oxygen flame; then, the quartz tube sealed with the charge is placed in the Bridgman growth furnace. Initially, the crucibles are all loc...

Embodiment 2

[0027] Example 2: LiGa 3 Te 5 Single crystal infrared nonlinear optical device

[0028] The LiGa obtained in Example 1 3 Te 5 After the single crystal is oriented, cut and coated according to a certain direction, the KTP crystal is pumped with a 1064nm laser, and the laser output of 3μm is realized through OPO, and the laser is used as the pump source to pump LiGa 3 Te 5 Single crystal, receiving 1.5μm frequency doubled laser output through a photomultiplier tube.

Embodiment 3

[0029] Example 3: LiGa 3 Te 5 Single crystal infrared nonlinear optical device

[0030] The LiGa obtained in Example 1 3 Te 5 The single crystal is oriented, cut and coated according to a certain phase matching direction, and then placed in image 3 In the experimental device shown, the device includes Nd:YAG 1064nm laser 1, KTP OPO2, LiGa 3 Te 5 OPO input mirror 4, LiGa 3 Te 5 Single crystal 5 and LiGa 3 Te 5 OPO output mirror 6. Pump KTP crystal with Nd:YAG 1064nm laser 1 at room temperature, output 2.1μm laser 3 through KTP OPO 2 and use this laser as the pump source to pass LiGa 3 Te 5 OPO input mirror 4 pumped LiGa 3 Te 5 Single crystal 5, through LiGa 3 Te 5 The OPO output mirror 6 outputs mid-to-far infrared laser 7 of 3-12 μm.

[0031] Pumping LiGa with a Ho:YAG laser with a wavelength of 2.06μm at room temperature 3 Te 5 Single crystal 5 can also achieve 3μm~12μm mid- and far infrared tunable laser output through OPO.

[0032] Pumping LiGa with a Tm Ho:GdVO4 laser with ...

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Abstract

The invention provides a single crystal LiGa3Te5 which is in a non-centrosymmetric structure, belonging to a trigonal system; the space group is R32, and the cell parameters are as follows: alpha=beta=90 degrees, gamma=120 degrees, and Z=12; and the unit cell volume is expressed as follows: the diameter is 3-15mm, and the length is 20-40mm. The preparation method of the single crystal LiGa3Te5 comprises the steps of firstly preparing polycrystalline LiGa3Te5 and then growing the single crystal LiGa3Te5 by Bridgman method. The prepared single crystal LiGa3Te5 can be used for the physical performance test and the device research of crystals and is large enough; meanwhile, the single crystal LiGa3Te5 has a wide infrared transmission range and can realize mid and far infrared laser outputs by a nonlinear frequency transform technique so that the single crystal LiGa3Te5 can be applied to the manufacturing of nonlinear infrared optical devices as well as piezoelectric devices.

Description

Technical field [0001] The present invention relates to a LiGa 3 Te 5 The single crystal compound also relates to the growth method of the single crystal and the application of the single crystal. Background technique [0002] Non-linear optical crystals are mainly used for non-linear frequency conversion such as laser frequency doubling, sum frequency, difference frequency, parametric oscillation and amplification, in order to broaden the range of existing laser radiation wavelengths and open up new laser light sources. At present, the frequency conversion crystals that have been discovered can be divided into three types: ultraviolet, visible waveband, and infrared nonlinear optical crystals according to different light transmission ranges. (1) Ultraviolet nonlinear optical crystal. After systematic research, we successfully found excellent ultraviolet frequency conversion crystals in the borate crystals, such as BBO, LBO, CBO, CLBO, and deep ultraviolet nonlinear optical crys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B11/00H01S3/108C30B29/46
Inventor 陶绪堂王善朋刘贯东蒋民华
Owner SHANDONG UNIV
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