In situ observation of photoinduced refractive-index changes in filaments formed in glasses by femtosecond laser pulses
Optics Letters, Vol. 26, Issue 1, pp. 19-21 (2001)
http://dx.doi.org/10.1364/OL.26.000019
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Abstract
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 μm. The refractive-index change was confirmed by two of three different methods to be as large as 0.8 × 10-2.
© 2001 Optical Society of America
[Optical Society of America ]
OCIS Codes
(130.2790) Integrated optics : Guided waves
(160.2750) Materials : Glass and other amorphous materials
(190.3270) Nonlinear optics : Kerr effect
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(230.7370) Optical devices : Waveguides
(320.7110) Ultrafast optics : Ultrafast nonlinear optics
Citation
Kazuhiro Yamada, Wataru Watanabe, Tadamasa Toma, Kazuyoshi Itoh, and Junji Nishii, "In situ observation of photoinduced refractive-index changes in filaments formed in glasses by femtosecond laser pulses," Opt. Lett. 26, 19-21 (2001)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-26-1-19
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