Chinese Academy of Sciences

Other

Binwen Liu

Mingjian Zhang

Huiyi Zeng

Guocong Guo

Yuhang Fan

Xiaoming Jiang

Yong Liu

Bingxuan Li

Goucong Guo

The present application discloses a nonlinear optical crystal material, preparation method and application of the nonlinear optical crystal material. A nonlinear optical crystal material, whose molecular formula is GaSe; wherein the crystal structure of said nonlinear optical crystal material belongs to trigonal system, space group R3 with the lattice parameters of a=b=3&#x2dc;4.2 &#x212b;, c=9&#x2dc;10 &#x212b;, &#x3b1;=&#x3b2;=90&#xb0;, &#x3b3;=120&#xb0; and Z=1. The nonlinear optical crystal material has an excellent infrared nonlinear optical performance, whose frequency-doubling intensity can reach 9.3 times of AgGaSwith the same particle size, and it meets type-I phase matching; and its laser damage threshold can reach 7.5 times of AgGaSwith the same particle size. The nonlinear optical crystal material has important application value in the frequency-converters which can be used for frequency doubling, sum frequency, difference frequency, optical parametric oscillation of laser in mid and far infrared waveband, and the like.

Nonlinear optical crystal material, method for preparation thereof, and application thereof

This disclosure provides an optical parametric oscillator, comprising, in a light path, a first lens, a laser crystal, a second lens, a nonlinear optical crystal, and a third lens in this order, wherein an optical parametric oscillation chamber is formed between the second lens and the third lens, and the nonlinear optical crystal is a monoclinic GaScrystal, the space group of the monoclinic GaScrystal is Cc, and the unit cell parameters are a=11.1 &#x212b;, b=6.4 &#x212b;, c=7.0 &#x212b;, &#x3b1;=90&#xb0;, &#x3b2;=121&#xb0;, &#x3b3;=90&#xb0;, and Z=4.

[object Object]

This disclosure provides a second harmonic generator and an optical parametric oscillator, the second harmonic generator and the optical parametric oscillator comprise one or more nonlinear optical frequency conversion crystal and a pump laser source, the nonlinear optical frequency conversion crystal is a monoclinic Ga.sub.2S.sub.3 crystal, the space group of the monoclinic Ga.sub.2S.sub.3 crystal is Cc, and the unit cell parameters are a=11.1.ANG., b=6.4.ANG., c=7.0.ANG., .alpha.=90.degree., .beta.=121.degree., .gamma.=90.degree., and Z=4.

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Fuzhou, China

Binwen Liu