Broadband optical active waveguides written by femtosecond laser pulses in lithium fluoride

Ismael Chiamenti, Francesca Bonfigli, Anderson S. L. Gomes, Rosa Maria Montereali, Larissa N. Da Costa, Hypolito J. Kalinowski

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Abstract

Broadband waveguiding through light-emitting strips directly written in a blank lithium fluoride crystal with a femtosecond laser is reported. Light guiding was observed at several optical wavelengths, from blue, 458 nm, to near-infrared, at 1550 nm. Visible photoluminescence spectra of the optically active F2 and F3+ color centers produced by the fs laser writing process were measured. The wavelength-dependent refractive index increase was estimated to be in the order of 10-3-10 -4 in the visible and near-infrared spectral intervals, which is consistent with the stable formation of point defects in LiF. © 2014 Chinese Physical Society and IOP Publishing Ltd.
Original languageEnglish
Article number014201
Pages (from-to)-
JournalChinese Physics Letters
Volume31
Issue number1
DOIs
Publication statusPublished - Jan 2014
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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