Femtosecond laser-induced refractive index modification in multicomponent glasses

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DOIResolve DOI: http://doi.org/10.1063/1.1876578
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TypeArticle
Journal titleJournal of Applied Physics
ISSN0021-8979
Volume97
Issue8
Pages083102-1083102-9; # of pages: 9
Subjectaluminosilicate glasses; borosilicate glasses; high-speed optical techniques; lanthanum compounds; laser materials processing; optical glass; optical waveguides; phosphate glasses; refractive index; sodium compounds
AbstractWe present a comprehensive study on femtosecond laser-induced refractive index modification in a wide variety of multicomponent glasses grouped as borosilicate, aluminum–silicate, and heavy-metal oxide glasses along with lanthanum–borate and sodium–phosphate glasses. By using high-spatial resolution refractive index profiling techniques, we demonstrate that under a wide range of writing conditions the refractive index modification in multicomponent glasses can be positive, negative, or nonuniform, and exhibits a strong dependence on the glass composition. With the exception of some aluminum–silicate glasses all other glasses exhibited a negative/nonuniform index change. We also demonstrate direct writing of waveguides in photosensitive Foturan® glass with a femtosecond laser without initiating crystallization by thermal treatment. Upon ceramization of lithium–aluminum–silicate glasses such as Foturan®, Zerodur®, and Robax® we observe switching of laser-induced refractive index change from being positive to negative. The measured transmission losses in the waveguides at agree with the index profile measurements in alkali-free aluminum–silicate glasses.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; NRC Steacie Institute for Molecular Sciences; NRC Institute for Microstructural Sciences
Peer reviewedYes
NPARC number12339087
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Record identifier84addf98-65c6-4795-8afd-f21befd559d8
Record created2009-09-11
Record modified2016-05-09
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