Share Email Print
cover

Proceedings Paper

Mitigation of laser induced damage on dielectric mirrors in a robust way
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Laser induced damage on dielectric mirrors and its rapid growth with successive shots have been and continue to be an important barrier to high power laser systems. Here the morphology of mitigation pit is optimized theoretically, and an ultrashort laser is utilized to totally remove damage on both high-reflective (HR) and anti-reflective (AR) coating. At the same time, the substrate is handled carefully and free of laser ablation, which lower the scattering loss and the amount of debris during laser machining process. Then, using R-on-1 test procedure, several mitigated sites with size of 1mm× 1mm are investigated by a Nd:YAG laser system with a flat-top spatial distribution of fully covering the mitigated site. The experimental results show even at the average fluence of 18J/cm2@6ns, there’s no damage initiation on AR coatings and no damage growth on HR coatings. It demonstrates that ultrashort laser machining is an effective and robust way to mitigate laser damage and a promising way to improve dielectric mirror performance of high power laser system in volume production.

Paper Details

Date Published: 8 July 2019
PDF: 6 pages
Proc. SPIE 11063, Pacific Rim Laser Damage 2019: Optical Materials for High-Power Lasers, 1106311 (8 July 2019); doi: 10.1117/12.2540919
Show Author Affiliations
Li Zhou, Shanghai Institute of Optics and Fine Mechanics (China)
Youen Jiang, Shanghai Institute of Optics and Fine Mechanics (China)
Simin Zhang, Shanghai Institute of Optics and Fine Mechanics (China)
Univ. of Chinese Academy of Sciences (China)
Hui Wei, Shanghai Institute of Optics and Fine Mechanics (China)
Wei Fan, Shanghai Institute of Optics and Fine Mechanics (China)
Xuechun Li, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 11063:
Pacific Rim Laser Damage 2019: Optical Materials for High-Power Lasers
Jianda Shao; Takahisa Jitsuno; Wolfgang Rudolph, Editor(s)

© SPIE. Terms of Use
Back to Top
PREMIUM CONTENT
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?
close_icon_gray