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 the crystal cannot be purchased in the market, has not been seen, and there is no SrBPO single crystal nonlinear optical performance test results, etc.

Inactive Publication Date: 2004-04-28
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 testin

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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Example Embodiment

[0047] Example 1: Preparation of large-size strontium borophosphate nonlinear optical crystal by the method of the present invention

[0048] 1. Synthesis of strontium borophosphate (SrBPO) 5 ) compound:

[0049] Sintering is carried out at a high temperature of 1000 ° C by a solid-state synthesis method, and the chemical equation is: [Reaction formula (7)]

[0050] SrCO 3 , H 3 BO 3 , NH 4 H 2 PO 4 Put it in a mortar at a stoichiometric ratio, mix and grind it carefully, then put it into an open platinum crucible of Φ60mm×60mm, press it tightly, put it into a muffle furnace, slowly rise to 500 ° C, and keep it at a constant temperature for 24 hours. After cooling Take out the crucible, the sample is relatively loose at this time, then take out the sample and re-grind it evenly, then place it in the crucible and keep it in a muffle furnace at 1000°C for another 48 hours, at which time the sample becomes a piece. At this time, it was taken out, put into a mortar a...

Example Embodiment

[0061] Example 2:

[0062] Homemade Li 4 P 2 O 7 Flux: select analytical pure NH 4 H 2 PO 4 and Li 2 CO 3 It is mixed according to the molar ratio, and the mixed molar ratio is: NH 4 H 2 PO 4 : Li 2 CO 3 =1:1, after mixing and grinding, sintered at 650-700℃ for 36 hours to make Li 4 P 2 O 7 flux;

[0063] Homemade Li 4 P 2 O 7 Flux and SrBPO synthesized by reaction formula (6) above 5 Mixed according to the following molar ratio, SrBPO 5 : Li 4 P 2 O 7 = 1:0.8, after uniform mixing, 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 materials, and place it at the top of the furnace and the center of the crucible. There is a small hole for the seed rod to enter and exit, the temperature is raised to 1000 °C, and the temperature is quickly lowered to 848 °C (3 °C above the saturation temperature) after 72 hours of constant temperature, and the S...

Example Embodiment

[0064] Example 3:

[0065] Optional and 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, it is selected and prepared according to the following molar ratio, SrCO 3 : H 3 BO 3 :(NH 4 ) 2 HPO 4 : NaF=1: 1.7: 1.7: 0.2, then use a Φ100mm×100mm open platinum crucible as a container, put the crucible into the single crystal growth furnace, seal the opening at the top of the furnace with insulating materials, and place the crucible on the top of the furnace. There is a small hole in the center position for the seed rod to enter and exit, and the temperature is slowly raised to 1080°C, and then rapidly cooled to 945°C (6°C above the saturation temperature) after constant temperature for 90 hours. 5 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 sm...

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Abstract

The present invention relates to large size nonlinear SrBPO5 optical crystal with size of (10-70)x(10-70)x(10-70) mm. It has wide transparent wavelength range of 190-3000 nm, negative monocrystal axis and Mohs' hardness 6.0. The growth process includes heating SrBPO5 in molar ratio, BPO4-R or Li4P2O7 as fluxing agent, maintaining and lower to the temperature 2-10 deg.c higher than the saturated temperature to obtain melt; setting the seed crystal in seed crystal rod inside the melt, maintaining for 0.5-6 hr, lowering to the saturated temperature fast, lowering the temperature in the rate of 0.2-5 deg.c/day, hoisting the crystal to over the liquid surface and lowering the temperature in the rate of 5-100 deg.c/hr to obtain the crystal. The crystal may be used in making double frequency generator, up and down frequency converter, optical parametric oscillator and other non-linear 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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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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