Paper Published in Applied Optics
On the 6th, Applied Optics published our manuscript entitled, Optimized single-shot laser ablation of concave mirror templates on optical fibers. The manuscript describes a process for realizing mirror templates on the tips of optical fibers by single-shot CO2 laser ablation. It also presents a systematic study of the influence of the pulse power, pulse duration, and laser spot size on their geometry. The investigation provides new insights into CO2 laser ablation of optical fibers and should help improve current models. Notably, the study finds that the radius of curvature, depth, and diameter of the templates exhibit extrema as a function of the power and duration of the ablation pulse, and shows that compound convex–concave shapes can be obtained. In the paper, we also identify regimes of ablation parameters that lead to mirror templates with favorable geometries for use in cavity quantum electrodynamics and optomechanics.
Ph.D. student Thibaud Ruelle was the driving force behind this work, carrying out the experiments and modelling the results. Dr. Floris Braakman led and supervised the work as part of his 2015 Ambizione grant from the Swiss National Science Foundation.