A matching thin film for a frequency doubling element of an intense laser device and its preparation method

A strong laser and frequency doubling technology, applied in the field of optical materials, can solve the problems of difficult control of the reaction process and environmental pollution, and achieve the effects of low mechanical strength, short service life and excellent film performance.

Active Publication Date: 2022-02-11
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a matching film for a frequency doubling element of a strong laser device and a preparation method thereof, so as to solve the problem of difficult control of the reaction process and easy environmental pollution due to the use of an organic solvent in the preparation of a matching film for a frequency doubling element of a strong laser device. pollution problem

Method used

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  • A matching thin film for a frequency doubling element of an intense laser device and its preparation method
  • A matching thin film for a frequency doubling element of an intense laser device and its preparation method

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Effect test

Embodiment 1

[0027] The preparation method of the frequency doubling element matching film of the intense laser device in this embodiment includes the following steps:

[0028] (1) Add 30 mol of methyltriethoxysilane purified by vacuum distillation into the reaction kettle, heat the oil bath to 70°C, add 60 mol of deionized water according to the molar ratio of 1:2 and mix, stir the reaction and evaporate The liquid is extracted, and the viscosity of the evaporated liquid is monitored in real time with a rotational viscometer every 1 hour. When the viscosity reaches 300cP, the reaction is completed to obtain a silicone prepolymer;

[0029] (2) Dilute the silicone prepolymer and ethanol according to the mass ratio of 1:1 to prepare the coating sol;

[0030] (3) The coating sol was coated on the KDP substrate by the spin coating method, and the coating was homogenized for 1 min at a speed of 1000 r / min to obtain a film to be cured. ;

[0031] (4) heat-treat the film to be cured at 120° C. ...

Embodiment 2

[0034] The preparation method of the frequency doubling element matching film of the intense laser device in this embodiment includes the following steps:

[0035] (1) Add 30 mol of methyltriethoxysilane purified by vacuum distillation into the reaction kettle, heat the oil bath to 110°C, add 120 mol of deionized water according to the molar ratio of 1:4 and mix, stir the reaction and evaporate The liquid is extracted, and the viscosity of the evaporated liquid is monitored in real time with a rotational viscometer every 1 hour. When the viscosity reaches 700cP, the reaction is completed to obtain a silicone prepolymer;

[0036] (2) Dilute the silicone prepolymer and butanol according to the mass ratio of 1:3 to prepare the coating sol;

[0037] (3) The coating sol was coated on the KDP substrate by the spin coating method, and the coating was homogenized for 1 min at a speed of 400 r / min to obtain a film to be cured. ;

[0038] (4) heat-treat the film to be cured at 140° C....

Embodiment 3

[0041] The preparation method of the frequency doubling element matching film of the intense laser device in this embodiment includes the following steps:

[0042] (1) Add 30 mol of methyltriethoxysilane purified by vacuum distillation into the reaction kettle, heat the oil bath to 90°C, add 90 mol of deionized water according to the molar ratio of 1:3 and mix, stir the reaction and evaporate The liquid is extracted, and the viscosity of the evaporated liquid is monitored in real time with a rotational viscometer every 1 hour. When the viscosity reaches 1000cP, the reaction is completed to obtain a silicone prepolymer;

[0043] (2) Dilute the silicone prepolymer and acetone according to the mass ratio of 1:2 to prepare the coating sol;

[0044] (3) The coating sol was coated on the KDP substrate by the spin coating method, and the coating was homogenized for 1 min at a speed of 600 r / min to obtain a film to be cured. ;

[0045] (4) heat-treat the film to be cured at 130° C. ...

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Abstract

The invention discloses a matching thin film of a frequency doubling element of a strong laser device and a preparation method thereof, belonging to the technical field of optical materials. It includes the following steps: mix the purified methyltriethoxysilane with deionized water, stir the reaction under heating and distill the liquid, monitor the viscosity of the distilled liquid in real time, when the viscosity reaches the expected set value Finally, the obtained silicone prepolymer is mixed and diluted with an organic solvent to obtain a coating film sol; the coating film sol is coated on the substrate to obtain a film to be cured; the film to be cured is subjected to heat treatment to obtain a matching film. In the preparation of the silicone prepolymer of the present invention, in the absence of organic solvents and catalysts, methyltriethoxysilane and deionized water are condensed, and its synthesis progress can be accurately grasped by monitoring its viscosity in real time. The use of organic solvents can avoid environmental pollution caused by the volatilization of organic solvents. It is a green, environmentally friendly, safe and environmentally friendly method for preparing strong laser thin films.

Description

technical field [0001] The invention relates to the technical field of optical materials, in particular to a matching thin film of a frequency doubling element of a strong laser device and a preparation method thereof. Background technique [0002] Optical components in powerful laser devices need to be coated with a special anti-reflection coating to achieve high-energy transmission of laser light, and the output surface of the frequency doubling element needs to achieve high anti-reflection for both 527nm and 1053nm. In order to achieve high anti-reflection at dual wavelengths, two layers of thin films with specific refractive index and film thickness must be prepared on the output surface of the frequency doubling element, namely the matching film and the anti-reflection film. SiO 2 Anti-reflection coating system is a widely used optical material with good optical properties, mechanical properties and chemical stability, and is the first choice for the preparation of str...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G77/06C08L83/04
CPCC08J5/18C08G77/06C08J2383/04
Inventor 王天宇邓雪然雷向阳杨伟惠浩浩张清华马红菊张帅张利平张剑锋
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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