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.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
Chiamenti, I., Bonfigli, F., Gomes, A. S. L., Montereali, R. M., Da Costa, L. N., & Kalinowski, H. J. (2014). Broadband optical active waveguides written by femtosecond laser pulses in lithium fluoride. Chinese Physics Letters, 31(1), -. . https://doi.org/10.1088/0256-307X/31/1/014201