Improved method for laser damage testing coated optics - art. no. 59912A

被引：28

作者：

Borden, MR ^{[1
]}

Folta, JA ^{[1
]}

Stolz, CJ ^{[1
]}

Taylor, JR ^{[1
]}

Wolfe, JE ^{[1
]}

Griffin, AJ ^{[1
]}

Thomas, MD ^{[1
]}

机构：

[1] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

来源：

Laser-Induced Damage in Optical Materials: 2005 | 2005年 / 5991卷

关键词：

antireflection coating; laser damage; initiation; growth;

D O I：

10.1117/12.637825

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The laser damage test for qualifying a coating run of anti-reflection coated optics consists of scanning a pulsed 1064 nm laser to illuminate approximately 2400 sites over a 1 cm x 1 cm area on a test sample. Scans are repeated at 3 J/cm(2) increments until the fluence specification for the optic is reached. In the past, initiation of I or more damage sites was classified as a failed coating run, requiring the production optics in the corresponding coating lot be reworked and recoated. Recent laser damage growth tests of 300 repetitive pulses performed on numerous damage sites revealed that all were stable up to 20 J/cm(2). Therefore the acceptance criteria has been modified to allow a moderate number of damage sites, as long as they are smaller than the allowed dig size and are stable (do not grow). Consequently many coating runs that previously would have been rejected are now accepted, resulting in higher yield, lower cost, and improved delivery schedule. The new test also provides assurance that initiated damage sites are stable during long term operation.

引用

页码：A9912 / A9912

页数：10

共 7 条

[1] OXIDE COATINGS FOR ONE MICROMETER LASER FUSION SYSTEMS [J].