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Proceedings Paper

Optical waveguide fabrication inside transparent materials by use of plasma channeling induced by tailored femtosecond laser
Author(s): Masanao Kamata; Kosuke Ohta; Minoru Obara; Hiroshi Sekita
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Paper Abstract

With a loosely focused femtosecond laser, refractive index change is induced in silica glass without any scanning process. By decrease numerical aperture of the incident laser, the induction of irregular structure can be avoided such as clacks and spatial splitting of the induced refractive index change region. We demonstrate controlling of the refractive index change by optimizing the numerical aperture and input energy and input pulsewidth and laser shot number. A new method of fabrication of photonic devices in silica glass is proposed.

Paper Details

Date Published: 17 October 2003
PDF: 6 pages
Proc. SPIE 4977, Photon Processing in Microelectronics and Photonics II, (17 October 2003); doi: 10.1117/12.479241
Show Author Affiliations
Masanao Kamata, Keio Univ. (Japan)
Kosuke Ohta, Keio Univ. (Japan)
Minoru Obara, Keio Univ. (Japan)
Hiroshi Sekita, Cyber Laser, Inc. (Japan)


Published in SPIE Proceedings Vol. 4977:
Photon Processing in Microelectronics and Photonics II
Alberto Piqué; Koji Sugioka; Peter R. Herman; Jim Fieret; David B. Geohegan; Frank Träger; Kouichi Murakami; Friedrich G. Bachmann; Jan J. Dubowski; Willem Hoving; Kunihiko Washio, Editor(s)

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