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Structural, mechanical and optical studies on ultrafast laser inscribed chalcogenide glass waveguide

Ayiriveetil, Arunbabu and Varma, G Sreevidya and Chaturvedi, Abhishek and Sabapathy, Tamilarasan and Ramamurty, Upadrasta and Asokan, Sundarrajan (2017) Structural, mechanical and optical studies on ultrafast laser inscribed chalcogenide glass waveguide. In: OPTICAL MATERIALS, 66 . pp. 386-391.

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Official URL: http://dx.doi.org/10.1016/j.optmat.2017.02.030


Multi-scan waveguides have been inscribed in GeS2 glass sample with different pulse energies and translation speeds. Mechanical and structural changes on GeS2 binary glass in response to irradiation to 1047 nm femto-second laser pulses have been investigated. The optical characterization of these waveguides has been done at 1550 nm of laser wavelength and the material response to laser exposure is characterized by both nanoindentation studies and micro-Raman spectroscopy. Nanoindentation investigations show a decrease in hardness (H) and elastic modulus (E) upon laser irradiation. The change in E and H are found to be varying with the translational speed, pulse energy and hence the net-fluence at the sample. These changes are correlated with variations in the Raman response of photo-exposed glass which is interpreted in terms of structural modifications made by the laser inscriptions to the glassy network. The mechanical behavior and local structural changes on waveguide writing is found to be dependent on net-fluence and it is correlated with the preparation conditions like melt temperature and cooling rate. (C) 2017 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited: 03 Jun 2017 09:43
Last Modified: 06 Oct 2018 14:53
URI: http://eprints.iisc.ac.in/id/eprint/57120

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