The mechanism of near infrared (IR) focused femtosecond (fs) laser induced defects in silica glasses produced by different methods is systematically investigated through measurements of absorption, fluorescence, and electronic spin resonance (ESR) spectra. The influence of impurities and hydroxyl groups on defects is discussed. The results show that ES silica glasses containing high OH and few defects are much stable under fs laser irradiation. It is also verified that Si E?' center formation has no direct relation with chloride ions.
© 2005 Chinese Optics Letters
(160.2750) Materials : Glass and other amorphous materials
(300.6250) Spectroscopy : Spectroscopy, condensed matter
(320.7130) Ultrafast optics : Ultrafast processes in condensed matter, including semiconductors
Qinling Zhou, Liying Liu, Lei Xu, Wencheng Wang, Jianrong Qiu, Congshan Zhu, and Fuxi Gan, "Femtosecond laser induced defects in various silica glasses," Chin. Opt. Lett. 2, 246-248 (2004)