Next Article in Journal
Wear and Corrosion Behaviour of Supersaturated Surface Layers in the High-Entropy Alloy Systems CrMnFeCoNi and CrFeCoNi
Previous Article in Journal
Simulation and Optimization Design of SiC-Based PN Betavoltaic Microbattery using Tritium Source
Previous Article in Special Issue
Pulse-Propagation Modeling and Experiment for Femtosecond-Laser Writing of Waveguide in Nd:YAG
Open AccessArticle

Double-Track Waveguides inside Calcium Fluoride Crystals

1
Université de Bordeaux, CNRS, CEA, CELIA, UMR5107, F-33405 Talence, France
2
Université de Bordeaux, CNRS, ICMCB, UMR5026, F-33608 Pessac, France
*
Author to whom correspondence should be addressed.
Crystals 2020, 10(2), 109; https://doi.org/10.3390/cryst10020109
Received: 25 January 2020 / Revised: 7 February 2020 / Accepted: 10 February 2020 / Published: 12 February 2020
(This article belongs to the Special Issue Laser Crystals)
Calcium Fluoride (CaF2) was selected owing to its cubic symmetry and excellent luminescence properties as a crystal of interest, and ultrafast laser inscription of in-bulk double-track waveguides was realized. The guiding properties of these waveguides in relation to the writing energy of the femtosecond pulse are presented. The modified double-track waveguides have been studied by systematic developments of beam propagation experiments and numerical simulations. Furthermore, an adapted model and concepts were engaged for the quantitative and qualitative characterization of the waveguides, particularly for the transmission loss measurements and the three-dimensional refractive index mappings of the modified zones. Additionally, polarization-dependent guiding was investigated.
Keywords: femtosecond lasers; direct laser writing (DLW); micro-processing; photonic device; cubic crystal; waveguides; double-track; Calcium Fluoride; refractive index change; quantitative phase imaging femtosecond lasers; direct laser writing (DLW); micro-processing; photonic device; cubic crystal; waveguides; double-track; Calcium Fluoride; refractive index change; quantitative phase imaging
MDPI and ACS Style

Gebremichael, W.; Canioni, L.; Petit, Y.; Manek-Hönninger, I. Double-Track Waveguides inside Calcium Fluoride Crystals. Crystals 2020, 10, 109.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop