Lithium strontium borate non-linear optical crystal as well as preparation method and application thereof

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

Active Publication Date: 2013-12-11
XINJIANG ZIJING OPTICAL ELECTRICAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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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
Penin, N. and Seguin, L. of the United States reported a lithium strontium borate (LiSrB9O15) compound exists, but so far there is no single crystal of this compound, especially millimeter or centimeter crystals for optical use
[0004] CN1504535A discloses "a kind of photoluminescent crystal material strontium lithium borate". Monoclinic strontium lithium borate single crystal (molecular formula SrLiBO3), however, this crystal material can only transmit light at 410-800nm

Method used

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  • Lithium strontium borate non-linear optical crystal as well as preparation method and application thereof
  • Lithium strontium borate non-linear optical crystal as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

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 steps are as follows:

[0044] LiOH, Sr(OH) 2 , H 3 BO 3 Put it into a mortar with a stoichiometric ratio (the molar ratio of Li, Sr, and B is 1:1:9), mix and grind carefully, then put it into a Φ200mm×200mm open corundum crucible, press it tightly, and put In the muffle furnace, heat up slowly to 450°C, keep the temperature constant for 5 hours, drive out the gas as much as possible, take out the crucible after cooling, grind the sample evenly, then put it in the crucible, and keep the temperature in the muffle furnace at 600°C for another 5 hours, etc. After the temperature drops to room temperature, take it out, grind it carefully, keep the temperature at 830°C for 24 hours again, and put it into a mortar after cooling. At this time, the sample is relatively loose and lightly ground to obtain a completely sintered lithium stro...

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 ↑ Synthesis of LiSrB 9 o 15 compound, Li 2 CO 3 : Sr(OH) 2 :B 2 o 3 The molar ratio is 1:2:9, and the rest of the 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 According to the amount of material ratio LiSrB 9 o 15 : Li 2 CO 3 : MoO 3 =1:1:3 for mixing, put it into a Φ100mm×100mm open platinum crucible, heat up to 800°C, keep the temperature for 100 hours and then cool down to 630°C, the cut LiSrB 9 o 15 The seed crystal is fixed on the lower end of the seed rod with a 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 rpm, and after constant temperature for 1 hour, it quickly cools down to 618 °C (saturation temper...

Embodiment 3

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

[0052] The synthesized LiSrB 9 o 15 Compound and Flux LiOH, MoO 3 According to the amount of material ratio LiSrB 9 o 15 :LiOH:MoO 3 =1:2:3 for mixing, put it into a Φ110mm×110mm open platinum crucible, heat up to 900°C, keep the temperature for 50 hours and then cool down to 630°C, the LiSrB cut along the a-axis 9 o 15 The seed crystal is fixed on the lower end of the seed rod with a 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. °C (saturation temperature), then lower the temperature at a rate of 1 °C / day, rotate the seed rod at a rate of ...

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Abstract

The invention discloses a lithium strontium borate non-linear optical crystal, wherein the molecular formula of lithium strontium borate is LiSrB9O15; the crystal belongs to trigonal system; the space group is R3c; the crystal cell parameters are as follows: a is equal to 10.6096(2)Angstrom, b is equal to 10.6096(2)Angstrom, c is equal to 17.5423(9)Angstrom, Alpha and Beta are equal to 90 degrees, Gamma is equal to 120 degrees and Z is equal to 6; the light-transmitting wave band of the crystal is 190-3000 nm; the non-linear optical effect is about 2.5 times of KDP; a Q-switched Nd:YAG laser (1064 nm) is used as a light source and can generate laser radiation with the wavelength of 532 nm; the crystal is not deliquescent, can reach centimetre level in size and is easy to cut, polish and preserve. The crystal can be used for manufacturing non-linear optical devices, such as double frequency generators, upper frequency converters, lower frequency converters or optical parameter oscillators.

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 Applications(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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