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Proceedings Paper

Inscription and characterization of micro-structures in silicate, Foturan and tellurite glasses by femtosecond laser direct writing
Author(s): K. C. Vishnubhatla; S. Venugopal Rao; R. Sai Santosh Kumar; K. Shiva Prasad; P. S. R. Prasad; D. Narayana Rao
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Paper Abstract

We present some of our results on the femtosecond laser direct writing and characterization of micro-structures in silicate, FoturanTM, and tellurite glasses. Structures with different sizes were fabricated with varying input energy and spatially modified pulse using a slit. Various characterization techniques including fluorescence spectroscopy, micro- Raman spectroscopy, and laser confocal microscopy were employed to analyze the structural and physical modifications at focal volume resulting in the change of refractive index (RI). The RI change due to material modification was estimated using diffraction from a continuous wave laser beam and is presented in this work. The results obtained are analyzed vis-a-vis the recent work in similar glasses and the applications of such structures in the fields of photonics.

Paper Details

Date Published: 13 March 2008
PDF: 11 pages
Proc. SPIE 6881, Commercial and Biomedical Applications of Ultrafast Lasers VIII, 688113 (13 March 2008); doi: 10.1117/12.762907
Show Author Affiliations
K. C. Vishnubhatla, Univ. of Hyderabad (India)
S. Venugopal Rao, Univ. of Hyderabad (India)
R. Sai Santosh Kumar, Univ. of Hyderabad (India)
K. Shiva Prasad, National Geophysical Research Institute (India)
P. S. R. Prasad, National Geophysical Research Institute (India)
D. Narayana Rao, Univ. of Hyderabad (India)


Published in SPIE Proceedings Vol. 6881:
Commercial and Biomedical Applications of Ultrafast Lasers VIII
Joseph Neev; Stefan Nolte; Alexander Heisterkamp; Christopher B. Schaffer, Editor(s)

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