We successfully realized broad-band light-emitting color center waveguides buried in LiF crystals by using femtosecond laser pulses. The characterization of the waveguides was performed by optical microscopy, photoluminescence spectra, loss measurements and near-field profiling. The experimental results show that the direct-writing fabrication process induces low-index contrast active channel waveguides: their wavelength-dependent refractive index changes, estimated from 10-3 to 10-4 depending on the writing conditions, allow supporting few modes at visible and near-infrared wavelengths. © 2014 AIP Publishing LLC.
Titolo: | Optical characterization of femtosecond laser induced active channel waveguides in lithium fluoride crystals |
Autori: | |
Data di pubblicazione: | 2014 |
Rivista: | |
Handle: | http://hdl.handle.net/20.500.12079/2898 |
Appare nelle tipologie: | 1.1 Articolo in rivista |
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