1. Advanced characterization of color centers lightemitting waveguides induced in lithium fluoride crystals by femtosecond laser
- Author
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Hypolito José Kalinowski, Anderson S. L. Gomes, Francesco Michelotti, I. Chiamenti, R. M. Montereali, Francesca Bonfigli, Bonfigli, F., and Montereali, R. M.
- Subjects
Electronic point defect ,Materials science ,Photoluminescence ,Optical waveguide ,Electronic point defects ,business.industry ,Physics::Optics ,Lithium fluoride ,Optical microscopy ,Laser ,Spectral line ,law.invention ,Optical waveguides ,Crystal ,chemistry.chemical_compound ,Wavelength ,Optics ,chemistry ,law ,Femtosecond ,Optoelectronics ,business ,Refractive index - Abstract
Waveguiding light-emitting strips have been written in a blank LiF crystal with a femtosecond laser, by translating the sample under the pulsed focused beam. Light guiding through these buried micro-structures was observed at several wavelengths between 458 and 1550 nm. Visible photoluminescence spectra of aggregate F2 and F3 + laser active color centers were measured. The refractive index increase, estimated of the order of 10-4 in the visible and near-infrared spectral intervals, is consistent with the stable formation of electronic point defects in LiF. These results are promising for the realization of miniaturized optical waveguiding solid-state amplifiers and lasers based on color centers. © 2014 AEIT.
- Published
- 2014
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