Nonlinear optical device comprising potassium sodium niobate single crystal

A nonlinear optics, potassium sodium niobate technology, applied in the field of optoelectronic functional materials, can solve problems such as difficulty in obtaining high optical quality large-size single crystals, difficulty in completely covering the atmospheric window, and inability to control growth parameters in real time, achieving large laser damage. Threshold, wide optical transmission wavelength range, no cracking issues
CN114507901AActive Publication Date: 2022-05-17SHANDONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG UNIV
Publication Date
2022-05-17

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Abstract

The invention relates to an infrared nonlinear optical crystal potassium sodium niobate as well as a preparation method and application thereof. The molecular formula of the potassium sodium niobate is (Na (1-x-y) KxAy) (Nb1-zBz) O3, x is more than or equal to 0 and less than or equal to 1, y is more than or equal to 0 and less than or equal to 0.2, z is more than or equal to 0 and less than or equal to 0.5, and A is Li, Ag, Ca, Ba, Sr or Sc; b is Ta, Sb, Mn or Zr), has a perovskite structure, belongs to an orthorhombic system, has a space group of A < 2 >, and is prepared by adopting a top seed crystal method. The potassium-sodium niobate crystal has good non-linear optical performance, the transmission range of the potassium-sodium niobate crystal is measured to reach 0.37-8 [mu] m through experiments, the powder frequency doubling strength of the potassium-sodium niobate crystal is about 7.6 times that of KTiOPO4, and the laser damage threshold is 98.9 MW / cm < 2 >. The method is expected to have important application value in the high-tech fields of laser guidance, laser directional infrared interference, laser communication, infrared remote sensing, thermal infrared imagers, infrared distance measurement, laser aiming and the like.
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Description

technical field

[0001] The invention relates to a nonlinear optical device containing potassium sodium niobate single crystal, and belongs to the technical field of optoelectronic functional materials. Background technique

[0002] With the development of modern laser technology, the laser wavelength that can be directly obtained by using laser crystals is limited, and it is impossible to achieve full-band laser output. Due to its unique nonlinear effects, nonlinear optical crystals, such as frequency doubling, sum frequency, difference frequency, Parametric amplification, etc., can effectively broaden the wavelength range of the laser. Using the nonlinear effect of crystals can be used to make a variety of nonlinear optical devices such as second harmonic generators, up-down frequency converters, and optical parametric oscillators. The electromagnetic radiation generated by the laser can be converted in frequency by nonlinear optical devices, so as to obtain more electroma...

Claims

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