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A. Baum and De Nicola, S. and S. Abdalah and K. Al-Naimee and A. Geltrude and M. Locatelli and R. Meucci and W. Perrie and Scully, P. J. and A. Taranu and Arecchi, F. T.
2011
June
Optical characterization of PMMA phase gratings written by a 387 nm femtosecond laser
Published
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284
12
2771
2774
We report on the fabrication of optical Bragg type phase gratings in polymethyl methacrylate substrates by a femptosecond Ti: Sapphire laser. As for their optical characterization, a spatially resolved microscopy interferometric technique is used to investigate the two-dimensional distribution of the refractive index change produced by the irradiation process. The technique gives a direct and quantitative two-dimensional profile of the index of refraction in irradiated PMMA, providing information on how the fabrication process depends on the laser irradiation. \circledC 2011 Elsevier B.V. All rights reserved.
10.1016/j.optcom.2011.02.032
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