In situ observation of photoinduced refractive-index changes in filaments formed in glasses by femtosecond laser pulses

被引：233

作者：

Yamada, K

Watanabe, W

Toma, T

Itoh, K

Nishii, J

机构：

[1] Osaka Univ, Grad Sch Engn, Dept Appl Phys, Suita, Osaka 5650871, Japan

[2] Agcy Ind Sci & Technol, Osaka Natl Res Inst, Opt Mat Div, Ikeda, Osaka 5638577, Japan

来源：

OPTICS LETTERS | 2001年 / 26卷 / 01期

关键词：

D O I：

10.1364/OL.26.000019

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigated the relationship between the formation of filaments and local refractive-index changes induced by femtosecond laser pulses in silica glass. In situ observation revealed that the location of a filament coincided with that of the refractive-index change. Observation also showed that the region of refractive-index change was elongated toward the upstream direction of the laser pulses with increasing exposure time. The region of refractive-index change was several hundred micrometers long, and its diameter was smaller than 2 mum. The refractive-index change was confirmed by two of three different methods to be as large as 0.8 x (C) 2001 Optical Society of America OCIS codes: 130.2790, 190.7110, 190.3270, 230.7370, 320.7110, 160.2750.

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页码：19 / 21

页数：3

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