Chinese Academy of Sciences

Hongping Wu

Shilie Pan

Xueling Hou

Hongwei Yu

The present invention relates to a cesium borosilicate compound, a nonlinear optical crystal of cesium borosilicate, and a preparation method therefor and a use thereof. The cesium borosilicate compound has a chemical formula of CsBSiOand a molecular weight of 481.15, and is prepared using a solid phase method. The nonlinear optical crystal of the cesium borosilicate compound has a chemical formula of CsBSiOand a molecular weight of 481.15, does not have a center of symmetry, belongs to the tetragonal system with space group Iand unit-cell parameters a=6.731(3) &#x212b;, c=9.871(9) &#x212b; and V=447.2(5) &#x212b;, and has a wide transmittance range. The shortest ultraviolet cutoff edge is smaller than 190 nm, the frequency doubling effect of the crystal is 4.6 KDP, and the crystal is grown by a high-temperature solution spontaneous crystallization method and a flux method. The crystal has advantages of high growth rate, being transparent and inclusion free, low cost having a wide transmittance range, high hardness, good mechanical property, being crack resistant and not prone to deliquescence, being easy to process and store, and the like. The crystal is widely applied to manufacturing of nonlinear optical devices such as frequency doubling generators, frequency up-converters, frequency down-converters or optical parametric oscillators.

Cesium borosilicate compound, nonlinear optical crystal of cesium borosilicate, and preparation method therefor and use thereof

The present invention relates to a potassium chloroborate nonlinear optical crystal, a preparation method and a use thereof. The crystal has a chemical formula of KBOCl, has no symmetric center, belongs to rhombohedral crystal system, has a space group R3m with unit cell parameters of a=10.0624(14) &#x212b;, b=10.0624(14) &#x212b;, c=8.8361(18) &#x212b;, Z=3 and V=774.8(2) &#x212b;. It has a powder second harmonic generation efficiency of about 3 times that of KDP (KHPO), and a Mohs hardness of 4-5, a transparent wavelength range of 165 nm-3460 nm. The compound is synthesized by a solid-state reaction and the crystal is grown by using a flux, which are of easy operation and low costs. The obtained crystal has large size, short growing period, little inclusion, relatively high mechanical hardness, and is easy to be cut, polished and stored. Said crystal is used to generate a second, third, fourth or fifth harmonic light output for a laser beam with a wavelength of 1064 nm.

Potassium chloroborate nonlinear optical crystal, preparation method and use thereof

The present invention provides a barium fluoroborate compound, a nonlinear optical crystal and the preparation method and use thereof. Both of the barium fluoroborate compound and the nonlinear optical crystal have a chemical formula of BaBOF. The crystal belongs to orthorhombic crystal system, has a space group Cmc2with unit cell parameters of a=18.802(3) &#x212b;, b=10.7143(19) &#x212b;, c=8.6113(14) &#x212b;, V=1734.7(5) &#x212b;. The crystal has a powder second harmonic generation efficiency of 10 times that of KDP (KHPO). The ultraviolet cutoff wavelength is about 170 nm. The barium fluoroborate compound is prepared by a solid-state reaction. The barium fluoroborate nonlinear optical crystal prepared by a high temperature melting liquid method has large hardness and is easy to be cut, polished and stored. This crystal can be used widely in preparing the nonlinear optical devices of the second harmonic generator, the up frequency converter, the down frequency converter or the optical parametric oscillator or the like.

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Urumqi, China

Hongping Wu