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A kind of preparation method of non-linear optical crystal surface anti-reflection protection film

A technology of nonlinear optics and crystal surfaces, applied in chemical instruments and methods, crystal growth, post-processing details, etc., to solve the problem of deliquescence, good environmental stability, and low melting point

Active Publication Date: 2016-01-20
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a method for preparing a moisture-proof + anti-reflection double-layer anti-reflection protective film for the non-linear optical crystal protective film. At the same time, this protective film also has higher Laser damage threshold and environmental stability

Method used

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  • A kind of preparation method of non-linear optical crystal surface anti-reflection protection film
  • A kind of preparation method of non-linear optical crystal surface anti-reflection protection film

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Distilled and purified methyltriethoxysilane (MTES), absolute ethanol (EtOH), hydrochloric acid (HCl), deionized water (H 2 O) After mixing and stirring according to the molar ratio of 1:24:0.6:1.5, place it in a stable environment (20°C, relative humidity 30%) for aging for 7 days, then use toluene as a solvent to replace ethanol, and remove residual HCl and water, that is A transparent polysiloxane moisture-proof film sol coating solution can be obtained. During the reaction process, water needs to be dissolved in ethanol first, and then slowly added to the mixed solution of MTES, ethanol and hydrochloric acid.

[0023] Tetraethyl orthosilicate (TEOS), ammonia (NH 3 ·H 2 O) and absolute ethanol (EtOH) were mixed and stirred evenly according to the molar ratio of 1:3:50, and placed in a stable environment (20°C, relative humidity 30%) for aging for 10 days to obtain a light blue silica sol. Then add PEG100 and hexamethyldisilazane into the silica sol (molar ratio 0....

Embodiment 2

[0027] Dimethyldiethoxysilane (DDS), absolute ethanol (EtOH), acetic acid (CH 3 COOH), deionized water (H 2 O), fully stirred at room temperature for 2 hours according to the molar ratio of 1:30:2:1, then left to age for 7 days, then replaced ethanol with n-butanol as a solvent, and removed residual acetic acid and water at the same time to obtain transparent Moisture-proof film sol coating solution. Pay attention to the order of adding raw materials during the preparation process, H 2 O was first dissolved in half of ethanol, and then added dropwise to the other half of the mixture of EtOH, DDS and acetic acid. Otherwise, the reaction speed is too fast, and the sol will form a suspension.

[0028] Tetraethyl orthosilicate (TEOS), ammonia (NH 3 ·H 2 O) and absolute ethanol (EtOH) were mixed and stirred evenly according to the molar ratio of 1:3:50, and placed in a stable environment (20°C, relative humidity 30%) for aging for 10 days to obtain a light blue silica sol. Th...

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Abstract

The invention relates to a preparation method of a nonlinear optical crystal surface antireflection protective film. Starting with the sol characteristic and film layer structure on the basis of the characteristic of high tendency to deliquescence of the nonlinear optical crystal growing in a water-soluble environment, the invention provides a preparation method of a moistureproof+antireflection double-layer antireflection protective film which has higher laser injury threshold and high environment-resisting stability. The moistureproof film layer material is prepared from silanolate containing hydrophobic group, and thus, has the characteristics of compact structure and low surface energy; and water molecules in air are isolated from the crystal, thereby enhancing the deliquescence resistance. The moistureproof film layer material is prepared from silanolate containing hydrophobic group, and thus, has the characteristics of compact structure and low surface energy; and water molecules in air are isolated from the crystal, thereby enhancing the deliquescence resistance. The method can implement novel complex functions of the nonlinear optical crystal protective film, and ensure the long-term stable operation of the crystal in a high-power laser system.

Description

technical field [0001] The invention belongs to the technical field of optical film preparation, and in particular relates to a method for preparing an anti-reflection protective film on the surface of a non-linear optical crystal prone to deliquescence. Background technique [0002] With the continuous expansion of the scale of high-power laser systems and the continuous increase of laser energy density, the requirements for supporting optical components such as laser glass, frequency doubling crystals, and optical coatings are getting higher and higher. Among them, nonlinear optical crystals are the key components to achieve frequency conversion in laser systems, and their importance is self-evident. However, most of these crystals (such as KDP, DKDP, LBO, BBO, etc.) are grown in aqueous solution, which has the disadvantages of low melting point and easy moisture absorption, which seriously affects the service life of crystal devices. Therefore, it is usually necessary to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B33/00
Inventor 王晓栋沈军吴广明周斌
Owner TONGJI UNIV
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