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Proceedings Paper

An efficient way to fabricate micro transmission grating inside quartz and PDMS material by femtosecond laser micromachining
Author(s): Sanyogita; Amar Ghar; U. Das; P. K. Panigrahi
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Paper Abstract

We report fabrication of optical volume grating inside the quartz glass and PDMS sample using femtosecond laser based micromachining system with 10μm grating period and areaof 2mm x 6mm x 2mm thickness. The wavelength of femtosecond (fs) laser system is 775nm, repetition rate and pulse width of the system is 1 KHz and 100 fs respectively. Both embedded micro gratings are successfully demonstrated under same fabrication parameters. The comparison of diffraction efficiency and angle of diffraction up to the third order of diffraction for grating inside the quartz glass and PDMS has been examined at 632.8 nm, 532 nm and 447 nm respectively. The change in R.I of laser modified region was obtained ~10-3.

Paper Details

Date Published: 16 October 2017
PDF: 6 pages
Proc. SPIE 10448, Optifab 2017, 104482N (16 October 2017); doi: 10.1117/12.2280219
Show Author Affiliations
Sanyogita, Indian Institute of Technology Kanpur (India)
Amar Ghar, Indian Insitute of Technology Kanpur (India)
U. Das, Indian Institute of Technology Kanpur (India)
P. K. Panigrahi, Indian Institute of Technology Kanpur (India)

Published in SPIE Proceedings Vol. 10448:
Optifab 2017
Julie L. Bentley; Sebastian Stoebenau, Editor(s)

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