Broadband Optical Active Waveguides Written by Femtosecond Laser Pulses in Lithium Fluoride  

作　　者：Ismael Chiamenti Francesca Bonfigli Anderson S. L. Gomes Rosa Maria Montereali Larissa N. da Costa Hypolito J. Kalinowski 

机构地区：[1]Federal University of Technology- Parang, 80230-901 Curitiba, Brazil [2]ENEA, C. R. Frascati, Photonics Micro and Nanostructures Laboratory, UTAPRAD-MNF, V. E. Fermi 45, 00044 Frascati (Rome), Italy [3]Department of Physics, Universidade Federai de Pernambuco, necife, Brazil

出　　处：《Chinese Physics Letters》2014年第1期72-75,共4页中国物理快报（英文版）

摘　　要：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 155nm. Visible photoluminescence spectra of the optically active F2 and F33 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.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 155nm. Visible photoluminescence spectra of the optically active F2 and F33 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.

分 类 号：TN24[电子电信—物理电子学] O78[理学—晶体学]