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17 March 2023 First demonstration of type A volume Bragg grating for the VIS-NIR applications
Joelle Harb, Lauris Talbot, Martin Bernier, Yannick Petit, Lionel Canioni
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Proceedings Volume PC12411, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXIII; PC124110J (2023) https://doi.org/10.1117/12.2649980
Event: SPIE LASE, 2023, San Francisco, California, United States
Abstract
We report the first demonstration of Volume Bragg grating (VBG) by femtosecond laser writing in silver-containing glasses using type A high refractive index modification supported by the laser-inscribed silver clusters. We present a comparative study between different approaches to achieve high diffraction efficiency in VBG for the VIS-NIR range. The first approach involves direct writing, line-by-line, and plane-after-plane, of the entire structure with a Gaussian beam as well as a Bessel beam. The second method will be considered with the inscription under a periodic phase mask. This work opens the avenue for femtosecond writing VBG with high throughputs compatible for industrialisation
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Joelle Harb, Lauris Talbot, Martin Bernier, Yannick Petit, and Lionel Canioni "First demonstration of type A volume Bragg grating for the VIS-NIR applications", Proc. SPIE PC12411, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXIII, PC124110J (17 March 2023); https://doi.org/10.1117/12.2649980
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KEYWORDS
Volume Bragg gratings
Femtosecond phenomena
Glasses
Bessel beams
Refractive index
Near infrared
Polymethylmethacrylate
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