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li 4 sr(bo 3 ) 2 compound, li 4 sr(bo 3 ) 2 Nonlinear optical crystal and its preparation method and application

A nonlinear optics and crystal technology, applied in the field of Li4Sr2 compounds, can solve the problems of not being able to achieve 1064nm wavelength laser quadrupling output, limiting output power and beam quality, and difficult to obtain c-thickness crystals, etc., to achieve easy processing and storage, The effect of low cost and large nonlinear optical effect

Active Publication Date: 2017-05-03
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the birefringence of LBO is relatively small, and the quadrupling output of 1064nm wavelength laser cannot be realized; the birefringence of BBO is relatively large, and there is a photorefractive effect when used for quadrupling output of 1064nm wavelength laser, which limits its Output power and beam quality; while CLBO is extremely deliquescent and difficult to achieve commercial applications; KBBF is difficult to obtain crystals with a large c-thickness due to its serious layered growth habit

Method used

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  • li <sub>4</sub> sr(bo <sub>3</sub> ) <sub>2</sub> compound, li <sub>4</sub> sr(bo <sub>3</sub> ) <sub>2</sub> Nonlinear optical crystal and its preparation method and application
  • li <sub>4</sub> sr(bo <sub>3</sub> ) <sub>2</sub> compound, li <sub>4</sub> sr(bo <sub>3</sub> ) <sub>2</sub> Nonlinear optical crystal and its preparation method and application
  • li <sub>4</sub> sr(bo <sub>3</sub> ) <sub>2</sub> compound, li <sub>4</sub> sr(bo <sub>3</sub> ) <sub>2</sub> Nonlinear optical crystal and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Using the flux method, with Li 2 O-B 2 o 3 Growth of Li in flux system 4 Sr(BO 3 ) 2 crystals.

[0043] Weigh 160.1 g (2.167 mol) Li 2 CO 3 , 49.2 g (0.333 mol) SrCO 3 and 61.8 g (1.000 mol) H 3 BO 3 (with 1.500mol Li 2 CO 3 and 0.333mol H 3 BO 3 As a flux), after mixing and grinding evenly, load in batches in an open crucible and melted in a muffle furnace at 750 °C. Then in a vertical crystal growth furnace, the temperature was rapidly raised to 750°C, kept at a constant temperature for 24 hours, and then cooled to 550°C at a rate of 20°C / day. Li 4 Sr(BO 3 ) 2 Crystals precipitated on the surface of the melt. Finally, the temperature was lowered to room temperature at a rate of 50°C / day. Pick out the transparent Li 4 Sr(BO 3 ) 2 Crystal and powder X-ray diffraction analysis on it, its spectrum is consistent with the spectrum simulated by us based on the results of single crystal X-ray diffraction analysis Figure 1 To, such as figure 2 shown....

Embodiment 2

[0046] Using the flux method, with Li 2 O-B 2 o 3 Growth of Li in -LiF flux system 4 Sr(BO 3 ) 2 crystals.

[0047] Weigh 135.5 g (1.833 mol) Li 2 CO 3 , 49.2 g (0.333 mol) SrCO 3 , 61.8 g (1.000 mol) H 3 BO 3 and 8.6 g (0.333 mol) LiF (with 1.167 mol Li 2 CO 3 , 0.333mol H 3 BO 3 and 0.333mol LiF as a flux), after mixing and grinding evenly, load in batches in an open crucible and melted in a muffle furnace at 750 °C. Then, the temperature was rapidly raised to 750° C. in a vertical crystal growth furnace, kept at a constant temperature for 24 hours, and then rapidly cooled to 10° C. above the saturation temperature. Slowly extend the seed crystal rod with the seed crystal into the melt of the crucible, and start the rotation device at the upper end of the seed crystal rod, and the rotation rate is 35 rpm. After maintaining the temperature for half an hour, quickly cool down to the saturation temperature, and then cool down at a rate of 0.8°C / day. After the c...

Embodiment 3

[0049] Using the flux method, with Li 2 O flux grows Li 4 Sr(BO 3 ) 2 crystals.

[0050] Weigh 123.2 g (1.667 mol) Li 2 CO 3 , 49.2 g (0.333 mol) SrCO 3 and 41.2 g (0.667 mol) H 3 BO 3 (with 1.000mol Li 2 CO 3 As a flux), after mixing and grinding evenly, load in batches in an open crucible and melted in a muffle furnace at 750 °C. Then, the temperature was rapidly raised to 750° C. in a vertical crystal growth furnace, kept at a constant temperature for 24 hours, and then rapidly cooled to 10° C. above the saturation temperature. Slowly extend the seed crystal rod equipped with the seed crystal into the melt of the crucible, and start the rotation device at the upper end of the seed crystal rod, and the rotation rate is 40 rpm. After maintaining the temperature for half an hour, quickly cool down to the saturation temperature, and then cool down at a rate of 0.5°C / day. After the crystal grows to the desired size, lift the seed rod to remove the crystal from the ...

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Abstract

The invention provides an Li4Sr(BO3)2 compound, Li4Sr(BO3)2 nonlinear optical crystals as well as a preparation method and an application of the Li4Sr(BO3)2 nonlinear optical crystals and relates to the field of nonlinear optical crystal materials. The frequency doubling conversion efficiency of the Li4Sr(BO3)2 nonlinear optical crystals at 1064nm is about twice of that of KH2PO4 (KDP) crystals, the ultraviolet absorption cut-off edge of the Li4Sr(BO3)2 nonlinear optical crystals is shorter than 190nm and the Li4Sr(BO3)2 nonlinear optical crystals do not absorb moisture; by virtue of a fluxing agent method, large-size transparent Li4Sr(BO3)2 nonlinear optical crystals can separately grow with Li2O, Li2O-B2O3 and Li2O-B2O3-LiF as fluxing agents; Li4Sr(BO3)2 crystals have stable physical and chemical properties and moderate hardness and are easily cut, processed, saved and applied, can be used for manufacturing nonlinear optical devices and can develop the nonlinear optical applications at ultraviolet and deep ultraviolet wave bands.

Description

technical field [0001] The present invention relates to a kind of Li 4 Sr(BO 3 ) 2 Compound, Li 4 Sr(BO 3 ) 2 Nonlinear optical crystals, the Li 4 Sr(BO 3 ) 2 The preparation method of the crystal and the use of the crystal in making nonlinear optical devices. [0002] technical background [0003] The nonlinear optical effect of crystal refers to such an effect: when a beam of laser light with a certain polarization direction passes through a nonlinear optical crystal in a certain direction, the frequency of the beam will change. Crystals with nonlinear optical effects are called nonlinear optical crystals. Using the nonlinear optical effect of crystals, nonlinear optical devices such as second harmonic generators, up-down frequency converters, and optical parametric oscillators can be made. The all-solid-state laser using nonlinear optical crystals for frequency conversion is a development direction of lasers in the future, and the key is to obtain excellent nonli...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/22C30B9/12G02F1/355
Inventor 张国春罗军华夏明军赵三根吴以成
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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