Nonlinear optical crystal strontium calcium pyroniobate and preparation method thereof

A kind of nonlinear optics, strontium calcium pyroniobate technology, applied in the field of optoelectronic functional materials, can solve the problem that nonlinear optical crystals have not yet been obtained

Inactive Publication Date: 2016-10-05
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Through decades of hard work by scientists from various countries, many nonlinear optical crystals have been discovered, some of which have been practically applied, such as: KDP (KH 2 PO 4 ), KTP (KTiOPO 4 ), LBO (LiB 3 o 5 ), BBO (β-BaB 2 o 4 ), LiN

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: Growth of Calcium Strontium Pyroniobate CaSrNb by Pulling Method 2 o 7 crystals.

[0018] will press CaSrNb 2 o 7 The stoichiometric ratio of accurately weighed SrCO 3 , CaCO 3 and Nb 2 o 5 Mix and grind evenly. After tableting, react in solid state at 800°C for 24 hours in a muffle furnace. After taking it out, grind and tablet again, and raise the temperature to 1200°C for 24 hours. Put the synthesized above samples into φ45×35mm 3 In the iridium gold crucible, put it into the pulling furnace, adopt the pulling method, in N 2 In the atmosphere, when the growth temperature is 1450-1500°C, the crystal rotation speed is 5 rpm, and the pulling speed is 2.5 mm / hour, a crystal with a size of φ20×15mm is grown. 3 high quality CaSrNb 2 o 7 crystals. After testing, its multiplication factor is about 3.5 times KDP.

Embodiment 2

[0019] Example 2: Growth of Calcium Strontium Pyroniobate CaSrNb by Pulling Method 2 o 7 crystals.

[0020] will press CaSrNb 2 o 7 The stoichiometric ratio of accurately weighed SrCO 3 , CaCO 3 and Nb 2 o 5 Mix and grind evenly. After tableting, react in solid state at 800°C for 24 hours in a muffle furnace. After taking it out, grind and tablet again, and raise the temperature to 1200°C for 24 hours. Put the synthesized above samples into φ45×35mm 3 In the iridium gold crucible, put it into the pulling furnace, adopt the pulling method, in N 2 In the atmosphere, when the growth temperature is 1450-1500 °C, the crystal rotation speed is 20 rpm, and the pulling speed is 0.5 mm / hour, a crystal with a size of φ22×19mm is grown. 3 high quality CaSrNb 2 o 7 crystals. After testing, its multiplication factor is about 3.7 times KDP.

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PUM

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Abstract

A nonlinear optical crystal calcium strontium pyroniobate [CaSrNb 2 o 7 ] and a preparation method thereof relate to the field of artificial crystals. The crystal belongs to the orthorhombic crystal system, and the space group is Cmc2 1 , melting with the same composition, the melting point is 1450-1500°C, and the crystals with high optical quality and large size can be grown by the pulling method, and its second-order nonlinear optical coefficient is equivalent to 3-4 times KDP, which can realize visible and near-mid-infrared bands Phase matching. Physical performance tests show that the crystal has high transmittance in the visible and near-middle infrared bands, and has good various physical, chemical, thermal and mechanical properties. The crystal is a new nonlinear optical crystal suitable for visible and near-mid-infrared bands, and is expected to be practically applied.

Description

technical field [0001] The invention belongs to the technical field of optoelectronic functional materials, in particular to nonlinear optical crystal materials used in lasers. Background technique [0002] Nonlinear optical crystals refer to crystals with nonlinear optical effects. Nonlinear optical effects refer to effects such as frequency doubling, difference frequency, sum frequency and parametric amplification. Nonlinear optical crystal materials are widely used in laser technology. It is mainly used to convert the laser frequency and expand the tunable frequency range of the laser, so that the laser can be used more widely. At present, frequency doubling, difference frequency, sum frequency and other technologies are widely used. It usually uses a special nonlinear optical crystal placed in front of the laser beam to change the output wavelength of the laser beam. [0003] Through decades of hard work by scientists from various countries, many nonlinear optical crys...

Claims

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Application Information

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IPC IPC(8): C30B15/00C30B29/30G02F1/155
Inventor 林州斌吴辉黄溢声张莉珍孙士家苑菲菲
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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