2015/03/06 by Sunil Thomas, T. Toney Fernandez, Thomas, Sunil +11
Engineering · Physics and Astronomy · #Advanced Surface Polishing Techniques #Laser Material Processing Techniques #Photorefractive and Nonlinear Optics #cond-mat.mtrl-sci #msc:78A60 #msc:82D30 #physics.optics
paper · pdf · doi:10.48550/arxiv.1503.01927
5 pages, 3 figures
arxiv created 2015/03/06 · arxiv updated 2015/03/09
Low loss, optical channel waveguides have been successfully produced by high repetition rate, femtosecond laser inscription in a Li-Zn fluoroborate glass (64.9B2O3 + 25Li2O + 10ZnF2 + 0.1Er2O3). High quality waveguides were produced at 500 kHz, 1 MHz and 2 MHz laser repetition rates, showing a refractive index contrast in the range of 3-6 x 10-3 depending on various fluences. Dependence of experimental parameters such as average laser power, pulse repetition rate and writing speed on the properties of fabricated waveguides has been discussed. The comparison of optical and compositional characterization techniques evidences an enrichment of B and Zn in the guiding region, while F migrates to the heat diffused region of the written structure.