LABERDESQUE, Romain; LOI, Laura; GUÉRINEAU, Théo; KHALIL, Alain; DANTO, Sylvain; CARDINAL, Thierry; CANIONI, Lionel; PETIT, Yannick

doi:10.3389/aot.2023.1237679

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LABERDESQUE, Romain
Centre d'Etudes Lasers Intenses et Applications [CELIA]

LOI, Laura
Centre d'Etudes Lasers Intenses et Applications [CELIA]

GUÉRINEAU, Théo
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]

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Article de revue

Ce document a été publié dans

Advanced Optical Technologies. 2023, vol. 12, p. 1237679

Frontiers

Résumé en anglais

A novel type of waveguide Bragg grating (WBG) is demonstrated based on femtosecond laser-induced Type A refractive index modifications, namely based of the photochemistry of silver species in a specialty ortho-phosphate glass matrix. First-order WBGs are reported in the near-infrared and down to 736 nm in the visible. Relative transmission measurements with a 500 µm long WBGs lead to narrow-bandwidth attenuations (sub-nm spectral FWHM) from 2.29 dB to 6.25 dB for periods from 240 nm to 280 nm, respectively. The corresponding estimated backward coupling coefficients show high values from 1.66 mm-1 up to 2.69 mm-1. Additionally, we report on a true 3D helixshaped WBG that shows an even stronger relative attenuation of 10.3 dB for a 500 µm long WBG, equivalently corresponding to a backward coupling coefficient of 3.7 mm-1. These novel results pave the way for new silver-based laser-inscribed integrated photonic devices, among which the combination of Bragg gratings to form active/passive optical resonators, but also the direct inscription of WBG at the glass interface for enhanced sensing applications.< Réduire

Mots clés en anglais

femtosecond laser manufacturing

integrated optics

silver clusters

type A refractive index change

waveguide Bragg gratings

DOI

http://dx.doi.org/10.3389/aot.2023.1237679

Project ANR

Initiative d'excellence de l'Université de Bordeaux
Architectures photoniques intégrées inscrites par laser femtoseconde pour étalonnage en microscopie de fluorescence dans l'infrarouge - ANR-19-CE08-0021
ImPRession laser de fibres exOtiques Multi-MaTEriaux - ANR-17-CE08-0042

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Importé de hal

Unités de recherche

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026