Three-dimensional femtosecond laser inscription of type a-based high-efficiency first-order waveguide Bragg gratings
PETIT, Yannick
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Centre d'Etudes Lasers Intenses et Applications [CELIA]
< Leer menos
Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
Centre d'Etudes Lasers Intenses et Applications [CELIA]
Idioma
en
Article de revue
Este ítem está publicado en
Advanced Optical Technologies. 2023, vol. 12, p. 1237679
Frontiers
Resumen en inglés
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 ...Leer más >
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.< Leer menos
Palabras clave en inglés
femtosecond laser manufacturing
integrated optics
silver clusters
type A refractive index change
waveguide Bragg gratings
Proyecto ANR
Initiative d'excellence de l'Université de Bordeaux
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Architectures photoniques intégrées inscrites par laser femtoseconde pour étalonnage en microscopie de fluorescence dans l'infrarouge
ImPRession laser de fibres exOtiques Multi-MaTEriaux - ANR-17-CE08-0042
Orígen
Importado de HalCentros de investigación