FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Broadband Optical Active Waveguides Written by Femtosecond Laser Pulses in Lithium Fluoride |
Ismael Chiamenti1, Francesca Bonfigli2, Anderson S. L. Gomes3, Rosa Maria Montereali2, Larissa N. da Costa1, Hypolito J. Kalinowski1** |
1Federal University of Technology– Paraná, 80230-901 Curitiba, Brazil 2ENEA, C. R. Frascati, Photonics Micro and Nanostructures Laboratory, UTAPRAD-MNF, V. E. Fermi 45, 00044 Frascati (Rome), Italy 3Department of Physics, Universidade Federal de Pernambuco, Recife, Brazil
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Cite this article: |
Ismael Chiamenti, Francesca Bonfigli, Anderson S. L. Gomes et al 2014 Chin. Phys. Lett. 31 014201 |
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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.
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Received: 09 October 2013
Published: 28 January 2014
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