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Mechanisms of femtosecond laser-induced refractive index modification of poly(methyl methacrylate)

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Abstract

The mechanisms of refractive index change in poly(methyl methacrylate) by frequency doubled femtosecond laser pulses are investigated. It is demonstrated that positive refractive index modificaton can be caused by a combination of depolymerization and crosslinking.

© 2009 Optical Society of America

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