Silica-Based Sol-Gel Coating with High Transmission at 1053 and 527 nm and Absorption at 351 nm for Frequency-Converting Crystals in High-Power Laser System

A high-power laser system is employed to drive the fusion ignition to realize sustainable supply of green energy according to the inertial confinement fusion theory, in which frequency-converting crystals are sealed in the terminal vacuum chamber and utilized to turn the incident laser (1053 nm) to...

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Bibliographic Details
Published inApplied sciences Vol. 9; no. 23; p. 5038
Main Authors Deng, Xue-Ran, Yang, Wei, Hui, Hao-Hao, Zhang, Qing-Hua, Xu, Qiao, Chen, Jin-Ju, Zhu, Ji-Liang, Lei, Xiang-Yang
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.12.2019
Subjects
Absorption
Ammonia
Clean energy
Coating
Coatings
Conversion
Crystals
Energy
Ethanol
frequency-converting crystal coating
High power lasers
high-power laser system
Inertial confinement fusion
Laser damage
Lasers
Nanoparticles
Optics
Potassium
Protective coatings
reflected 351 nm laser
Silica
Sol-gel processes
Vacuum chambers
China
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Summary:A high-power laser system is employed to drive the fusion ignition to realize sustainable supply of green energy according to the inertial confinement fusion theory, in which frequency-converting crystals are sealed in the terminal vacuum chamber and utilized to turn the incident laser (1053 nm) to the desired one (351 nm). However, the reflected 351 nm laser from the pellet hohlraum that goes back through the frequency-converting crystal is found to be harmful for the upstream elements that are located before the terminal chamber. In this study, a specialized coating system for the frequency-converting crystals was designed and fabricated to both ensure high output power for the fusion and reduce the reflected 351 nm laser energy by absorption. Furthermore, the structural, mechanical, and laser-damage resistant properties of this coating were investigated as well.
ISSN:2076-3417
2076-3417
DOI:10.3390/app9235038