Study of femtosecond-laser-written waveguides in glasses

作     者：Streltsov, AM Borrelli, NF 

作者机构：Corning Inc Corning NY 14831 USA 

出 版 物：《JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS》 (美国光学会志，B辑：光物理学)

年 卷 期：2002年第19卷第10期

页      面：2496-2504页

核心收录：

学科分类：070207[理学-光学] 07[理学] 08[工学] 0803[工学-光学工程] 0702[理学-物理学] 

主　　题：Fused-silica Induced breakdown Wave-guides Pulses Densification Dielectrics Fabrication fabrication Dielectrics color centers pulse energy Repetition rate induced stress Waveguide Device Component Fused silica Densification 

摘      要：Mechanisms of the femtosecond-laser-induced refractive-index change (Deltan) were investigated for fused silica and a borosilicate glass. Experiments were based on two exposure situations: (a) high repetition rate and low pulse energy and (b) low repetition rate and high pulse energy. The calculated temperature rise based on model (b) was above 1000 degreesC, whereas for situation (a) it was negligible. The results do not support a thermal origin of the induced Deltan;rather, heat may limit the magnitude of the change. Correlation between color-center formation and Deltan in both glasses suggests that defects contribute substantially to the index increase. However, annealing studies have shown that the induced An persisted beyond the disappearance of the color centers. Analysis of the induced stress showed that densification plays a small role in this change. (C) 2002 Optical Society of America.