$Large refractive index change in silicone-based and non-silicone-based hydrogel polymers induced by femtosecond laser micro-machining$

Large refractive index change in silicone-based and non-silicone-based hydrogel polymers induced by femtosecond laser micro-machining

A Ti:Sapphire femtosecond laser with a pulse energy of 1.3 nJ at a 93 MHz repetition rate has been used to micro-machine optical gratings inside several silicone-based and non-silicone-based hydrogel polymers. By measuring the diffraction efficiency of the gratings at 632.8 nm, we find as large as 0...

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Veröffentlicht in:	Optics express 2006-11, Vol.14 (24), p.11901-11909
Hauptverfasser:	Ding, Li, Blackwell, Richard, Kunzler, Jay F, Knox, Wayne H
Format:	Artikel
Sprache:	eng
Online-Zugang:	Volltext
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Zusammenfassung:	A Ti:Sapphire femtosecond laser with a pulse energy of 1.3 nJ at a 93 MHz repetition rate has been used to micro-machine optical gratings inside several silicone-based and non-silicone-based hydrogel polymers. By measuring the diffraction efficiency of the gratings at 632.8 nm, we find as large as 0.06+/- 0.005 average refractive index change within the irradiated area.
ISSN:	1094-4087 1094-4087
DOI:	10.1364/OE.14.011901