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A lithium strontium borate nonlinear optical crystal and its preparation method and application

A technology of nonlinear optics and lithium strontium borate, applied in the fields of nonlinear optics, chemical instruments and methods, optics, etc., can solve problems such as no single crystal

Active Publication Date: 2016-01-27
XINJIANG ZIJING OPTICAL ELECTRICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003]After decades of hard work by scientists from various countries, many nonlinear optical crystals have been discovered, and some nonlinear optical crystals have been applied in practice, such as: KDP, KTP , LBO, BBO, etc., but these crystals still cannot fully meet the growing application requirements, so scientists from all over the world are still paying close attention to the exploration and research of various new nonlinear optical crystals
U.S. Penin, N. and Seguin, L. etc. reported a lithium strontium borate (LiSrB 9 o 15 ) compound exists, but so far there is no single crystal of this compound, especially the millimeter or centimeter scale crystal for optical use
[0004] CN1504535A discloses "a photoluminescent crystal material strontium lithium borate". The crystal material uses lithium carbonate and boric acid as flux, and is grown by molten salt method to obtain monoclinic strontium lithium borate single crystal (molecular formula SrLiBO 3 ), however the crystalline material is only transparent at 410-800nm

Method used

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  • A lithium strontium borate nonlinear optical crystal and its preparation method and application
  • A lithium strontium borate nonlinear optical crystal and its preparation method and application

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Embodiment 1

[0043] Press LiOH+H 3 BO 3 +Sr(OH) 2 →LiSrB 9 O 15 +H 2 O↑ Synthesis of lithium strontium borate (LiSrB 9 O 15 ) Compound, the specific operation steps are as follows:

[0044] Put LiOH, Sr(OH) 2 , H 3 BO 3 Put it into a mortar at a stoichiometric ratio (the molar ratio of Li, Sr, and B is 1:1:9), mix and grind carefully, then put it into an open corundum crucible of Φ200mm×200mm, press it tightly, and put it in In the muffle furnace, slowly heat up to 450°C and keep the temperature constant for 5 hours. Try to drive out the gas. After cooling, take out the crucible, grind the sample evenly, and then place it in the crucible. In the muffle furnace at 600°C for another 5 hours, etc. After the temperature dropped to room temperature, it was taken out, carefully ground, and kept at 830°C for 24 hours. After cooling, it was placed in a mortar. At this time, the sample was loosely and slightly ground to obtain a sintered lithium strontium borate compound. The product was subjected to ...

Embodiment 2

[0048] According to the reaction formula Li 2 CO 3 +B 2 O 3 +Sr(OH) 2 →LiSrB 9 O 15 +CO 2 ↑+H 2 O↑ Synthetic LiSrB 9 O 15 Compound, Li 2 CO 3 : Sr(OH) 2 : B 2 O 3 The molar ratio of is 1:2:9, and the remaining specific operation steps are carried out according to Example 1.

[0049] The synthesized LiSrB 9 O 15 Compound and flux Li 2 CO 3 , MoO 3 LiSrB according to the amount of substance 9 O 15 :Li 2 CO 3 :MoO 3 =1:1:3 for mixing, put it into an open platinum crucible of Φ100mm×100mm, raise the temperature to 800℃, and then cool to 630℃ after 100 hours at the constant temperature, and cut the LiSrB 9 O 15 The seed crystal is fixed on the lower end of the seed crystal rod with platinum wire, and the seed crystal is introduced into the crucible from the small hole on the top of the furnace to make it contact with the liquid surface. The seed crystal rotates at a rate of 50 revolutions per minute. After 1 hour of constant temperature, the temperature is quickly cooled to 618 ℃ (satur...

Embodiment 3

[0051] According to the reaction formula LiOH+H 3 BO 3 +SrCO 3 →LiSrB 9 O 15 +CO 2 ↑+H 2 O↑ Synthetic LiSrB 9 O 15 Compound, LiOH: SrCO 3 : H 3 BO 3 The molar ratio of is 1:1:9, and the other specific operation steps are carried out according to Example 1.

[0052] The synthesized LiSrB 9 O 15 Compound and flux LiOH, MoO 3 LiSrB according to the amount of substance 9 O 15 :LiOH:MoO 3 =1:2:3 for mixing, put it into an open platinum crucible of Φ110mm×110mm, raise the temperature to 900°C, and then cool down to 630°C after 50 hours of constant temperature, and cut the LiSrB along the a-axis 9 O 15 The seed crystal is fixed on the lower end of the seed rod with platinum wire, and the seed crystal is introduced into the crucible from the small hole on the top of the furnace to make it contact with the liquid surface. The seed crystal rotates at a rate of 30 rpm. After 1 hour of constant temperature, the temperature is quickly cooled to 618 ℃ (saturation temperature), then decrease the ...

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Abstract

The present invention discloses a non -linear optical crystal of lithium boric acid. R3C , Crystal cell parameters are a = 10.6096 (2)?,, b = 10.6096 (2)?,, c = 17.5423 (9)?,, α = β = 90 °, γ = 120 °, Z = 6.The translucent band of this crystal is 190-3000Nm, and the non-linear optical effect is about 2.5 times the KDP. The QND: YAG laser (1064nm) is used as a light source.The centimeter level is easy to cut, polished and preserved.This crystal material can be used to make non -linear optical devices, such as multiplier generators, upper frequency converters, lower frequency converters, or optical parameter oscillating.

Description

technical field [0001] The invention belongs to the field of optical crystals, and in particular relates to a lithium strontium borate nonlinear optical crystal, a preparation method and application thereof. Background technique [0002] Nonlinear optical crystals are a class of crystal materials with nonlinear optical effects such as frequency doubling, frequency mixing, and optical parametric oscillation. Using the frequency doubling effect of the crystal, the frequency of the laser can be changed, and the wavelength range of the laser light source can be broadened, thereby obtaining a new laser light source and making the laser widely used. The all-solid-state blue-green laser system is made of nonlinear optical crystals. It has the advantages of small size, stable light source, and low cost, and has broad application prospects. [0003] After decades of hard work by scientists from various countries, many nonlinear optical crystals have been discovered, and some nonline...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/22C30B15/00G02F1/355
Inventor 潘世烈张方方张芳袁杭寅赵兴俭韦建
Owner XINJIANG ZIJING OPTICAL ELECTRICAL TECH
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