Non-linear optical device containing boracite crystals

A nonlinear optics and cristobalite technology, which is applied in the field of nonlinear optical devices containing cristobalite crystals, and can solve problems such as the difficulty of deep ultraviolet nonlinear optical crystals.

Active Publication Date: 2018-12-07
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, from a structural point of view, the UV absorption edge and nonlinear coefficient of the crystal are usually contradictory, and it is extremely difficult to obtain a deep ultraviolet nonlinear optical crystal with excellent performance through structural design and optimization.

Method used

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  • Non-linear optical device containing boracite crystals
  • Non-linear optical device containing boracite crystals
  • Non-linear optical device containing boracite crystals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Embodiment 1 molten salt method grows boborite crystal

[0068] (1) Pre-calcined boronite: using analytically pure MgCl 2 、H 3 BO 3 As the initial raw material, according to Mg 3 B 7 o 13 Cl stoichiometry, MgCl 2 and H 3 BO 3 Excess 1wt% and 3wt% respectively carry out weighing, mixing, grinding, tabletting, and then put into a furnace, and pre-fire at 800-900° C. for two hours.

[0069] (2) crystal growth: adopt molten salt method to grow boborite crystal, comprise the following steps: pre-burned boborite and flux (flux is MgCl 2 and H 3 BO 3 According to the mixture of 1:1 in molar ratio, to ensure that the impurity phase is not introduced), weigh and mix according to the molar ratio of 1:1, put it into a platinum crucible, put the crucible into the center of the molten salt furnace, and cover the furnace cover; The temperature was raised to 1200°C at a rate of 50°C per hour, melted, and kept for two days, then lowered to room temperature at a rate of 50°C ...

Embodiment 2

[0070] Embodiment 2 molten salt method grows boborite crystal

[0071] (1) Pre-calcined boronite: using analytically pure MgO, MgCl 2 、H 3 BO 3 As the initial raw material, according to Mg 3 B 7 o 13 Cl stoichiometric ratio, MgO, MgCl 2 and H 3 BO 3 Weigh, where MgCl 2 and H 3 BO 3 Excessive 3wt% and 5wt%, respectively, mixed, ground, pressed into a furnace, and pre-fired at 800-900°C for two hours.

[0072] (2) crystal growth: adopt molten salt method to grow boborite crystal, comprise the following steps: pre-burned boborite and flux (flux is MgCl 2 and H 3 BO 3 According to the molar ratio of 3:1 mixture), weigh and mix according to the molar ratio of 1:2, put it into a platinum crucible, put the crucible in the center of the molten salt furnace, and cover the furnace cover; heat up at a rate of 50°C per hour Melt at 1180°C, keep warm for two days, then cool down to room temperature at a rate of 50°C per hour, wash with water, and obtain boronite crystals.

Embodiment 3

[0073] Embodiment 3 molten salt method grows boborite crystal

[0074] (1) Pre-calcined boronite: using analytically pure MgCl 2 、H 3 BO 3 As the initial raw material, according to Mg 3 B 7 o 13 Cl stoichiometric ratio, MgCl 2 and B 2 o 3 Weigh, where MgCl 2 Excess 2wt%, after mixing, grinding and tableting, put into furnace, and pre-fire at 800-900°C for two hours.

[0075] (2) crystal growth: adopt molten salt method to grow boborite crystal, comprise the following steps: pre-burned boborite and flux (flux is MgCl 2 and H 3 BO 3 According to the molar ratio of 3:1 mixture), weigh and mix according to the molar ratio of 1:4, put it into a platinum crucible, put the crucible in the center of the molten salt furnace, cover the furnace cover; heat up at a rate of 50 ° C per hour Melt at 1150°C, keep warm for two days, then cool down to room temperature at a rate of 50°C per hour, wash with water, and obtain boronite crystals.

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Abstract

The invention provides a non-linear optical device containing boracite crystals. The non-linear optical device contains the boracite crystals, wherein the boracite crystals are periodically poled. According to the non-linear optical device, after at least one incident electromagnetic radiation is made to pass through at least one boracite crystal, at least one output radiation with the frequency different with that of the incident electromagnetic radiation is generated, wherein the wavelength coverage of the incident electromagnetic radiations is from 0.155 micrometer to 4.0 micrometers. The boracite crystals refer to electro-optical information functional crystals with ferroelectricity and deep ultraviolet nonlinearity, the non-linear optical device made from the boracite crystals can output deep ultraviolet electromagnetic radiations through the quasi-phase matching technology referring to that periodic ferroelectric domain inversion is achieved by using a periodic poling method andapplying impulse voltage to the boracite crystals.

Description

technical field [0001] The invention relates to a nonlinear optical device, in particular to a 3 B 7 o 13 Cl) Nonlinear optical devices of crystals. Background technique [0002] With the development of modern laser technology, the laser wavelengths that can be directly obtained by using laser crystals are limited, and it is impossible to achieve full-band laser output. From ultraviolet to infrared spectral regions, there are still blank bands, especially in the deep ultraviolet region. Due to its unique nonlinear effects, such as frequency doubling, sum frequency, difference frequency, and parametric amplification, nonlinear optical crystals can effectively broaden the wavelength range of laser light. 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 ...

Claims

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Application Information

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IPC IPC(8): G02F1/355G02F1/35C30B29/10C30B9/12
CPCC30B9/12C30B29/10G02F1/353G02F1/3534G02F1/3551
Inventor 龙西法王祖建
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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