Abstract
Laser-induced damage in optical coatings is a great problem. The damage appears to be caused by some type of optical absorption in the coatings. Absorption of coatings is strictly influenced by columnar microstructure and nodular thin film defects. It is possible to reduce size and concentration of the defects and increase laser-induced damage threshold (LIDT) of thin film coatings using ion-assisted deposition. To optimize deposition parameters we have used a high precision LIDT measurement technique, developed at our laboratory.
© 1992 Optical Society of America
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