Directly written DFB waveguide lasers using femtosecond laser pulses

Martin Ams*, Peter Dekker, Graham D. Marshall, Douglas J. Little, Michael J. Withford

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contribution

Abstract

There is still significant speculation regarding the nature of femtosecond laser induced index change in bulk glasses with colour centre formation and densification the main candidates. In the work presented here, we fabricated waveguide Bragg gratings in doped and undoped phosphate glasses and use these as a diagnostic for monitoring subtle changes in the induced refractive index during photo- and thermal annealing experiments. Reductions in grating strengths during such experiments were attributed to the annihilation of colour centres.

Original languageEnglish
Title of host publicationInternational Symposium on High Power Laser Ablation 2010, HPLA 2010
EditorsClaude R. Phipps
Place of PublicationSanta Fe, N.M.
PublisherAmerican Institute of Physics
Pages438-445
Number of pages8
Volume1278
EditionIssue 1
ISBN (Print)9780735408289
DOIs
Publication statusPublished - Oct 2010
EventInternational High Power Laser Ablation Symposium, HPLA - 2010 - Santa Fe, United States
Duration: 18 Apr 201022 Apr 2010

Other

OtherInternational High Power Laser Ablation Symposium, HPLA - 2010
CountryUnited States
CitySanta Fe
Period18/04/1022/04/10

Keywords

  • Annealing
  • Colour centres
  • Femtosecond
  • Gratings
  • Phosphate

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