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.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)
Chiamenti, I., Bonfigli, F., Gomes, A. S. L., Michelotti, F., Montereali, R. M., & Kalinowski, H. J. (2014). Optical characterization of femtosecond laser induced active channel waveguides in lithium fluoride crystals. Journal of Applied Physics, 115(2), -. . https://doi.org/10.1063/1.4861636