@inproceedings{0ed617902c8e4477a4e66127938c6643,
title = "Optical characterization of phase gratings written by a UV femtosecond laser in PMMA",
abstract = "We report on the fabrication of optical Bragg type phase gratings in polymethyl methacrylate substrates irradiated by a femtosecond Ti: Sapphire laser. In order to investigate the distribution of the refractive index change produced by the femtosecond laser irradiation, we performed a two-dimensional visualization and spatially resolved optical analysis of the induced refractive index profile by using a digital holographic technique and an adaptive-iterative algorithm for wavefront reconstruction. The technique gives a direct and quantitative two-dimensional profile of the index of refraction in irradiated samples, providing information how the fabrication process depends on the laser irradiation.",
keywords = "Digital holography, Femtosecond laser, Phase grating, PMMA",
author = "\{De Nicola\}, S. and S. Abdalah and K. Al-Naimee and A. Geltrude and M. Locatelli and R. Meucci and A. Baum and W. Perrie and Scully, \{P. J.\} and A. Taranu and Arecchi., \{F. T.\}",
year = "2011",
doi = "10.1117/12.889429",
language = "English",
isbn = "9780819486783",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
booktitle = "Optical Measurement Systems for Industrial Inspection VII",
note = "Optical Measurement Systems for Industrial Inspection VII ; Conference date: 23-05-2011 Through 26-05-2011",
}