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Proceedings Paper

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

Paper Details

Date Published: 26 June 2013
PDF: 5 pages
Proc. SPIE 8769, International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013), 87693U (26 June 2013); doi: 10.1117/12.2018761
Show Author Affiliations
Tamilarasan Sabapathy, Indian Institute of Science (India)
Gayathri Sivakumar, Department of Instrumentation and Applied Physics, Indian Institute of Science (India)
Arunbabu Ayiriveetil, Indian Institute of Science (India)
Ajoy K. Kar, Heriot-Watt Univ. (United Kingdom)
Sundarrajan Asokan, Indian Institute of Science (India)

Published in SPIE Proceedings Vol. 8769:
International Conference on Optics in Precision Engineering and Nanotechnology (icOPEN2013)
Chenggen Quan; Kemao Qian; Anand Asundi, Editor(s)

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