Low loss waveguide on chalcogenide glass using ultrafast laser at low repetition rate

Tamilarasan Sabapathy, Gayathri Sivakumar, Arunbabu Ayiriveetil, Ajoy K. Kar, Sundarrajan Asokan

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

Abstract

In this work, we synthesized bulk amorphous GeGaS glass by conventional melt quenching technique. Amorphous nature of the glass is confirmed using X-ray diffraction. We fabricated the channel waveguides on this glass using the ultrafast laser inscription technique. The waveguides are written on this glass 100 μm below the surface of the glass with a separation of 50 μm by focusing the laser beam into the material using 0.67 NA lens. The laser parameters are set to 350 fs pulse duration at 100 KHz repetition rate. A range of writing energies with translation speeds 1 mm/s, 2 mm/s, 3 mm/s and 4 mm/s were investigated. After fabrication the waveguides facets were ground and polished to the optical quality to remove any tapering of the waveguide close to the edges. We characterized the loss measurement by butt coupling method and the mode field image of the waveguides has been captured to compare with the mode field image of fibers. Also we compared the asymmetry in the shape of the waveguide and its photo structural change using Raman spectra.

Original languageEnglish
Title of host publicationInternational Conference on Optics in Precision Engineering and Nanotechnology
Volume8769
DOIs
Publication statusPublished - 2013
EventInternational Conference on Optics in Precision Engineering and Nanotechnology 2013 - Singapore, Singapore
Duration: 9 Apr 201311 Apr 2013

Publication series

NameProceedings of SPIE
Volume8769
ISSN (Print)0277-786X

Conference

ConferenceInternational Conference on Optics in Precision Engineering and Nanotechnology 2013
Abbreviated titleicOPEN 2013
CountrySingapore
CitySingapore
Period9/04/1311/04/13

Keywords

  • Chalcogenide glasses
  • Photonics integrated circuits

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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  • Cite this

    Sabapathy, T., Sivakumar, G., Ayiriveetil, A., Kar, A. K., & Asokan, S. (2013). Low loss waveguide on chalcogenide glass using ultrafast laser at low repetition rate. In International Conference on Optics in Precision Engineering and Nanotechnology (Vol. 8769). [87693U] (Proceedings of SPIE; Vol. 8769). https://doi.org/10.1117/12.2018761