Large-size hydrated sodium borate non-linear optical crystal, preparation method and application thereof

Abstract

The invention relates to a hydrated sodium borate non-linear optical crystal with centimeter-grade large size, a preparation method and application thereof. A molecular formula of the crystal is Na2B5O11H5, the crystal belongs to an orthorhombic system, a space group is Pna21, the molecular weight is 281.07, and unit cell parameters are that: a is equal to 11.967 (2)*, b is equal to 6.5320 (13)*,and c is equal to 11.126 (2)*. The hydrated sodium borate non-linear optical crystal with the centimeter-grade large size is obtained by adopting a hydro-thermal method by a hydro-thermal reaction. The non-linear optical effect of the crystal is two thirds of that of a KDP crystal, the ultraviolet absorption cut-off edge is smaller than 190nm, and ultraviolet and visible regions have a wide transmission range. The growth process of the crystal has the advantages of simple operation, low cost, small toxicity, short growth cycle, steady physical and chemical properties and the like. The non-linear optical crystal can be widely applied to non-linear optical devices such as frequency doubling conversion, optical parametric oscillators and the like.

Description

technical field [0001] The invention relates to an inorganic borate nonlinear optical crystal, which belongs to the field of inorganic chemistry, and also belongs to the fields of crystallography, material science and optics. Background technique [0002] Nonlinear optical effects originate from the interaction between laser and medium. When the laser propagates in a medium with non-zero second-order polarizability, nonlinear optical effects such as frequency doubling, sum frequency, difference frequency, and optical parametric amplification will occur. Nonlinear optical crystal materials have penetrated into various fields of laser technology, and have become indispensable crystal materials for technologies such as laser frequency conversion, electro-optical modulation, and photorefractive crystal memory and storage. It is precisely because nonlinear optical crystal materials have such important application prospects that the research on nonlinear optical crystal materials...

AI Technical Summary

Problems solved by technology

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

[0005] Although Na 2 B 5 o 11 h 5 Compounds have been reported successively as early as 1975 (such as Corazza, E.; Menchetti, S.; Sabelli, C.Acta Cryst.1975, 31, 2405., etc.), but these reports have not yet involved the linear and nonlinear properties of crystals. Test research and its application in nonlinear optics

To test the basic physical properties (including nonlinear optical properties) of a crystal, the size of the crystal needs to be several millimeters or even centimeters, and there is no relevant preparation of Na 2 B 5 o 11 h 5 There is no single crystal report, and the crystal cannot be purchased in the market, and there is no report on Na 2 B 5 o 11 h 5 The report of the test results of the nonlinear optical properties of the single crystal or the Na 2 B 5 o 11 h 5 The Report of Using Single Crystal to Fabricate Nonlinear Optical Devices

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