Basic zinc borate nonlinear optical crystal, and preparation method and application thereof

Abstract

The invention relates to a basic zinc borate nonlinear optical crystal, and a preparation method and application thereof. The molecular formula of the crystal is Zn2BO4H; the molecular weight of the crystal is 206.56; the crystal belongs to monoclinic systems; the space group is P2<1>; the unit cell parameters are as follows: a=5.730(7) angstroms, b=4.952(4) angstroms, c=6.881(6) angstroms, beta=99.09(5) degrees, and Z=2; and the ultraviolet absorption cut-off edge of the light-transmitting wave band is at 220 nm. The basic zinc borate nonlinear optical crystal is prepared by adopting a bag-sealing hydrothermal method. The method is simple to prepare and is short in growth period, and the used initial raw materials are free of toxicity. The prepared basic zinc borate nonlinear optical crystal is used for preparing nonlinear optical devices comprising frequency multiplication generators, upper or lower frequency converters and optical parametric oscillators. The nonlinear devices made of the basic zinc borate nonlinear optical crystal comprises a device for enabling at least one beam of transmitted incident fundamental wave light to generate at least one beam of coherent light withfrequency different from the incident light.

Description

technical field [0001] The present invention relates to the chemical formula Zn 2 BO 4 The basic zinc borate nonlinear optical crystal of H, a preparation method and an optical device made by using the single crystal. Background technique [0002] Laser is a coherent monochromatic light source with good directionality and high intensity, which is widely used in various fields of military, industry, medical treatment and scientific research. Due to the limitations of the active ions in the laser crystal, the laser wavelengths output by solid-state lasers are mostly concentrated in the visible and near-infrared regions. Therefore, the use of nonlinear optical crystals for frequency conversion to obtain various laser sources with wide tuning has become a frontier topic in the development of laser technology. In modern laser technology, strong tunable coherent light output can be produced by using the frequency doubling effect, frequency mixing effect, tunable optical paramet...

AI Technical Summary

Problems solved by technology

Although the single crystal growth technology of these materials has become increasingly mature, there are still obvious deficiencies: such as deliquescence of the crystal, long growth cycle, serious layered growth habit and expensive price, etc.

[0004] Although the compound Zn 2 BO 4 H was reported in 1992 and 2003 (such as Chinese Patent Nos.92113403.7; Zhen-Tao Yu etc., J. Mater. Chem. 2003, 13, 2227-2233, etc.), but these reports did not involve Zn 2 BO 4 Measurement and Research of Linear Optical and Nonlinear Optical Properties of H Single Crystal and Its Application in Nonlinear Optics

To test the basic physical properties (including nonlinear optical properties) of a crystal, it is necessary to grow its single crystal. So far, there has been no relevant preparation of Zn crystals with a size sufficient for physical property testing. 2 BO 4 There is no report on the H single crystal, and the crystal cannot be purchased in the market, and there is no report on the Zn single crystal. 2 BO 4 The report of the test results of the nonlinear optical properties of H single crystal or the Zn 2 BO 4 A report on the application of H single crystal in the fabrication of nonlinear optical devices

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