Published June 29, 2020
| Version v1
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Femtosecond-written volume Bragg gratings in fluoride glasses
- 1. Centre d'Optique, Photonique et Laser (COPL), Université Laval, Québec City, Québec G1V 0A6, Canada
- 2. Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller-Universität Jena, Albert-Einstein-Str. 15, 07745 Jena, Germany
Description
We report on what we believe are the first volume Bragg gratings written inside bulk multicomponent fluoride glasses. The gratings inscribed with tightly focused infrared (IR)-femtosecond pulses in combination with the phase-mask technique exhibit refractive index modulations of up to 5×10^−4 with reflectivities up to 90% at a wavelength near 2.8 µm. Such highly compact and narrowband filters could have a significant impact on numerous high-end applications from the UV to the mid-IR.
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