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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Vol. 26, Iss. 1 — Jan. 1, 2001
  • pp: 19–21

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

Kazuhiro Yamada, Wataru Watanabe, Tadamasa Toma, Kazuyoshi Itoh, and Junji Nishii  »View Author Affiliations


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

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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