Femtosecond laser writing of buried waveguides in erbium III-Doped oxyfluoride glasses and nano-glass-ceramics

Yu-Lam Wong, David Furniss, Victor K. Tikhorairov, Elena A. Romanova, Mykhaylo Dubov, Thomas D.P. Allsop, Vladimir Mezentsev, Ian Bennion, Trevor M. Benson, Angela B. Seddon

Research output: Chapter in Book/Published conference outputChapter


Femtosecond-pulsed laser writing of waveguides, a few mm long, is demonstrated; waveguides were written orthogonally to the writing beam inside the bulk of ErIII-doped oxyfluoride glasses at a depth of 160 mum. The writing beam was 795 nm wavelength, 54 fs pulse duration and 11 MHz repetition rate. Tracks were written at pulse energies of 13.1 nJ to 26.1 nJ and sample translational velocity of 10 mmmiddot.s-1 to 28 mmmiddots-1. The influence of translational velocity and pulse energy on the cross-sectional shape and integrity of the written tracks is reported. Tracks tend to be narrower as the pulse energy is lowered or translational velocity decreased. Above 22.9 nJ, pulse energy, tracks tend to crack. The estimated refractive index profile of one track has a maximum increase of refractive index of 0.003 at the centre. These glasses normally form nano-glass-ceramics on heat treatment just above the glass transformation temperature (Tg). Here, a post-fs-writing heat-treatment just above Tg causes nano-ceramming of the glass sample and removes a light-guiding peripheral region of the fs-written tracks suggesting that this region may have been fs-modified by stress alone. Waveguiding at 651 nm and 973 nm wavelengths, and upconversion, are demonstrated in optimally written tracks.
Original languageEnglish
Title of host publicationICTON 2008
Subtitle of host publicationproceedings : 2008 10th anniversary of the International Conference on Transparent Optical Networks
EditorsM. Marciniak
Number of pages5
ISBN (Print)9781424426256
Publication statusPublished - 22 Jun 2008
Event10th Anniversary International Conference on Transparent Optical Network - Athens, Greece
Duration: 22 Jun 200826 Jun 2008


Conference10th Anniversary International Conference on Transparent Optical Network
Abbreviated titleICTON 2008
Others, 2008 (). (GR), 22-26 June 2008.


  • erbium
  • lasers
  • optical materials
  • pulsed laser deposition
  • sugar
  • sucrose
  • waveguides
  • 3-dimensional waveguides
  • buried waveguides
  • femto seconds
  • femtosecond-laser writing
  • Fs laser processing
  • International conferences
  • nano-glass-ceramics
  • novel glasses
  • pulsed lasers
  • transparent optical networks
  • upconversion


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