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Optical Materials Express

Optical Materials Express

  • Editor: David J. Hagan
  • Vol. 1, Iss. 4 — Aug. 1, 2011
  • pp: 670–677

Influence of bandgap and polarization on photo-ionization: guidelines for ultrafast laser inscription [Invited]

Douglas J. Little, Martin Ams, and Michael J. Withford  »View Author Affiliations

Optical Materials Express, Vol. 1, Issue 4, pp. 670-677 (2011)

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An ultrafast laser was used to fabricate waveguides in Yb:QX phosphate glass and BK7 borosilicate glass using linearly polarized and circularly polarized beams. Circularly polarized pulses were found to induce a higher refractive index change in Yb:QX phosphate glass, while in BK7 borosilicate glass circularly and linearly polarized pulses were found to induce the same refractive index change. An explanation for these contrasting results is proposed based on the fundamental polarization-dependence of photo-ionization. This explanation reconciles observations made in this study and also in a previous study in fused silica glass.

© 2011 OSA

OCIS Codes
(140.7090) Lasers and laser optics : Ultrafast lasers
(260.5210) Physical optics : Photoionization
(130.2755) Integrated optics : Glass waveguides

ToC Category:
Laser Materials Processing

Original Manuscript: June 22, 2011
Revised Manuscript: July 19, 2011
Manuscript Accepted: July 20, 2011
Published: July 21, 2011

Virtual Issues
Femtosecond Direct Laser Writing and Structuring of Materials (2011) Optical Materials Express

Douglas J. Little, Martin Ams, and Michael J. Withford, "Influence of bandgap and polarization on photo-ionization: guidelines for ultrafast laser inscription [Invited]," Opt. Mater. Express 1, 670-677 (2011)

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