Large size strontium borophosphate nonlinear optical crystal and its growth method and use

A nonlinear optics, strontium borophosphate technology, applied in the direction of crystal growth, single crystal growth, single crystal growth, etc., can solve the problem that there is no nonlinear optical performance test result of SrBPO single crystal, which has not been seen and cannot be purchased in the market. crystals etc.

Inactive Publication Date: 2005-06-22
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

To test the basic physical properties (including nonlinear optical properties) of a crystal, the crystal needs to be a single crystal with a size of several millimeters or even centimeters. So far, there has been no relevant preparation of SrBPO with a size sufficient for physical property testing. 5 There is no single crystal report, and the crystal cannot be purchased in the market, and there is no report on SrBPO 5 The report of the test results of the nonlinear optical properties of single crystal or SrBPO 5 The Report of Using Single Crystal to Fabricate Nonlinear Optical Devices

Method used

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  • Large size strontium borophosphate nonlinear optical crystal and its growth method and use
  • Large size strontium borophosphate nonlinear optical crystal and its growth method and use
  • Large size strontium borophosphate nonlinear optical crystal and its growth method and use

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Embodiment 1

[0049] Example 1: Preparation of large-size strontium borophosphate nonlinear optical crystals by the method of the present invention

[0050] 1. Synthesis of strontium borophosphate (SrBPO 5 ) compounds:

[0051] Sintering is carried out at a high temperature of 1000°C by a solid-state synthesis method, and its chemical equation is: [(7) reaction formula]

[0052] SrCO 3 、H 3 BO 3 , NH 4 h 2 PO 4 Put it into a mortar in a stoichiometric ratio, mix and grind it carefully, then put it into a Φ60mm×60mm open platinum crucible, press it tightly, put it in a muffle furnace, slowly raise it to 500°C, keep the temperature for 24 hours, and wait for it to cool Take out the crucible, the sample is relatively loose at this time, then take out the sample and grind it evenly again, then put it in the crucible, keep the temperature in the muffle furnace at 1000°C for another 48 hours, at this time the sample is formed into one piece. At this time, take it out, put it into a ...

Embodiment 2

[0064] Homemade Li 4 P 2 o 7 Flux: use analytically pure NH 4 h 2 PO 4 and Li 2 CO 3 Mix according to molar ratio, and its molar ratio is: NH 4 h 2 PO 4 : Li 2 CO 3 = 1:1, after mixing and grinding, sintering at a temperature of 650-700°C for 36 hours to make Li 4 P 2 o 7 flux;

[0065] Will homemade Li 4 P 2 o 7 Flux and the SrBPO synthesized by the above (6) reaction formula 5 Mix according to the following molar ratio, SrBPO 5 : Li 4 P 2 o 7 =1∶0.8, after mixing evenly, put it into an open platinum crucible of Φ100mm×100mm, put the crucible into a vertical heating furnace, seal the opening at the top of the furnace with insulating material, and place the furnace top and the center of the crucible Leave a small hole in the corresponding place for the seed rod to enter and exit, heat up to 1000°C, keep the temperature for 72 hours and then quickly cool down to 848°C (3°C above the saturation temperature), and cut the SrBPO along the c-axis 5The seed cry...

Embodiment 3

[0067] Selected with SrBPO 5 Equimolar ratio of SrCO 3 、H 3 BO 3 with (NH 4 ) 2 HPO 4 mixture of BPO 4 Available analytically pure H 3 BO 3 , (NH 4 ) 2 HPO 4 According to its stoichiometric ratio alternative selection, according to the following molar ratio for preparation, SrCO 3 :H 3 BO 3 :(NH 4 ) 2 HPO 4 : NaF=1:1.7:1.7:0.2, then use a platinum crucible with an opening of Φ100mm×100mm as the container, put the crucible into the single crystal growth furnace, seal the opening at the top of the furnace with insulating material, and connect the top of the furnace with the crucible A small hole is left at the corresponding position of the center for the seed rod to enter and exit. Slowly raise the temperature to 1080°C, keep the temperature for 90 hours and then quickly cool down to 945°C (6°C above the saturation temperature). SrBPO cut along the c-axis 5 The seed crystal is fixed on the lower end of the seed rod with a platinum wire, and the seed crystal is i...

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Abstract

The present invention relates to the chemical formula SrBPO 5 The large-scale strontium borophosphate nonlinear optical crystal has a size of 10-70mm×10-70mm×10-70mm; the crystal has a wide transmission range and is transparent in the range of 190nm-3000nm; it is a negative uniaxial crystal with Mohs hardness 6.0; its preparation method: in the crucible, the SrBPO mixed in molar ratio 5 with BPO 4 -R or Li 4 P 2 o 7 The flux is heated and kept at a constant temperature, and then cooled to 2-10°C above the saturation temperature to obtain a melt; the seed crystal mounted on the seed crystal rod is inserted into the melt, and the temperature is kept constant for 0.5-6 hours, and the temperature is quickly cooled to the saturation temperature. Then lower the temperature at a rate of 0.2-5°C / day, lift the obtained crystals from the liquid surface, and lower the temperature at a rate of 5-100°C / hour to obtain the crystal of the present invention; it has the advantages of fast growth, simple operation, and low cost. The crystal is large in size, transparent, wide in light transmission band, good in mechanical properties, not easy to break, stable in physical and chemical properties, non-deliquescent, easy to process and store; it can be used to make frequency multiplier generators, up or down frequency converters, optical parametric Oscillators and other nonlinear optical devices.

Description

technical field [0001] The invention relates to a nonlinear optical crystal and its growth method and application, in particular to a high-quality and large-size strontium borophosphate nonlinear optical crystal grown by flux method and its growth method and application. Background technique [0002] In laser technology, the laser wave bands that can be directly obtained by using laser crystals are limited, and there are still blank wave bands from ultraviolet to infrared spectral regions. Using nonlinear optical crystals, through nonlinear optical effects such as frequency doubling, frequency mixing, and optical parametric oscillation, the limited laser wavelength can be converted into a new band of laser light. Using this technology can fill in the blank spectral region of the laser wavelength emitted by various laser devices, so that the laser can be used more widely. The all-solid-state blue-green laser system can be realized by generating near-infrared laser light from...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B15/00C30B29/14
Inventor 吴以成潘世烈傅佩珍陈创天
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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