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
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.
. [J]. 中国物理快报, 2014, 31(1): 14201-014201.
Ismael Chiamenti, Francesca Bonfigli, Anderson S. L. Gomes, Rosa Maria Montereali, Larissa N. da Costa, Hypolito J. Kalinowski. Broadband Optical Active Waveguides Written by Femtosecond Laser Pulses in Lithium Fluoride. Chin. Phys. Lett., 2014, 31(1): 14201-014201.
2014, Vol. 31 
