【摘 要】
：
Different post-treatment processes involving the use of ammonia and hexamethyldisilazane[HMDS]were explored for application to 351 nm third harmonic generation SiO2 antireflective[3ω SiO2 AR]coatings for high power laser systems prepared by the sol-gel me
【机 构】
：
Key Laboratory of High Power Laser and Physics,Shanghai Institute of Optics and Fine Mechanics,Chine
论文部分内容阅读
Different post-treatment processes involving the use of ammonia and hexamethyldisilazane[HMDS]were explored for application to 351 nm third harmonic generation SiO2 antireflective[3ω SiO2 AR]coatings for high power laser systems prepared by the sol-gel method.According to experimental analysis,the 3ω SiO2 AR coatings that were successively post-treated with ammonia and HMDS at 150℃ for 48 h and again heat-treated at 180℃ for 2 h[N/H 150 + 180 AR]were relatively better.There were relatively fewer changes in the optical properties of the N/H 150 + 180 AR coating under a humid and polluted environment,and the increase in defect density was slow in high humidity environments.The laser-induced damage threshold of the N/H 150 + 180 AR coating reached 15.83 J/cm2[355 nm,6.8 ns],a value that meets the basic require-ments of high power laser systems.
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