Laser thin films with very high damage threshold

Jianda Shao; Zhengxiu Fan

doi:10.1117/12.625028

4 October 2005 Laser thin films with very high damage threshold

Jianda Shao, Zhengxiu Fan

Proceedings Volume 5963, Advances in Optical Thin Films II; 596312 (2005) https://doi.org/10.1117/12.625028
Event: Optical Systems Design 2005, 2005, Jena, Germany

Abstract

New developments of laser thin films for high power laser systems were reviewed. Special attention was paid to several key coatings which bottlenecked the higher power laser system, such as pick-off mirrors, large aperture polarizer and YAG harmonic wavelength splitter, as well as AR coatings. Defects were deemed to be the initial and essential source of laser-induced damage. The investigation of the original control of defects was focused on the deposition process control, such as substrate cleaning, purity of deposition materials, deposition temperature, oxygen pressure in vacuum chamber and so on. Several methods of evaluation of laser damage were employed, which included Laser Induced Damage Threshold (LIDT) determination and absorption detection based on Surface Thermal Lensing (STL) technique, as well as Total Integrated Scattering (TIS) measurement. The LIDT of pick-off mirrors reached to 20 J/cm² (1064 nm, 1 ns), meanwhile the LIDT of the ultraviolet coatings did to 8 J/cm² (355 nm, 1 ns) because of its comprehensive mechanism. The LIDT of third harmonic mirror could be improved effectively with post-treatment methods, such as oxygen-plasma post-treatment and vacuum annealing. Actually the situation of the laser thin films with very high damage threshold was complicated due to their uniformity of optical properties and stress induced surface deformation in the large aperture.

Citation Download Citation

Jianda Shao and Zhengxiu Fan "Laser thin films with very high damage threshold", Proc. SPIE 5963, Advances in Optical Thin Films II, 596312 (4 October 2005); https://doi.org/10.1117/12.625028

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available