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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry Van Driel
  • Vol. 26, Iss. 7 — Jul. 1, 2009
  • pp: 1370–1378

Spectral broadening in femtosecond laser written waveguides in chalcogenide glass

Mark A. Hughes, Weijia Yang, and Daniel W. Hewak  »View Author Affiliations


JOSA B, Vol. 26, Issue 7, pp. 1370-1378 (2009)
http://dx.doi.org/10.1364/JOSAB.26.001370


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Abstract

Nonlinear spectral broadening to 200 nm , from an initial width of 50 nm , has been demonstrated in gallium lanthanum sulphide glass waveguides from 1540 nm , 200 fs pulses at 30 nJ /pulse. A formation mechanism is presented for these femtosecond laser written waveguides, based on optical characterization and comparisons to previous work. Two different types of waveguide are identified. One has a characteristic long narrow structure and is formed through filamentation caused by self-focusing. The other has a characteristic “teardrop” structure, which is formed by a type IIA photosensitivity mechanism and cumulative heating of glass around a central laser-exposed region.

© 2009 Optical Society of America

OCIS Codes
(220.4000) Optical design and fabrication : Microstructure fabrication
(320.7110) Ultrafast optics : Ultrafast nonlinear optics

ToC Category:
Optical Design and Fabrication

History
Original Manuscript: December 3, 2008
Revised Manuscript: May 15, 2009
Manuscript Accepted: May 15, 2009
Published: June 15, 2009

Citation
Mark A. Hughes, Weijia Yang, and Daniel W. Hewak, "Spectral broadening in femtosecond laser written waveguides in chalcogenide glass," J. Opt. Soc. Am. B 26, 1370-1378 (2009)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-26-7-1370

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