0000000000166950
AUTHOR
Nadège Courjal
showing 4 related works from this author
Near IR stationary wave Fourier transform lambda meter in lithium niobate: multiplexing and improving optical sampling using spatially shifted nanogr…
2021
Several integrated optics solutions currently exist to develop monolithic, robust, and lightweight high-resolution spectrometers for spatial applications. An interesting option is generating a stationary wave inside a single-mode waveguide, and sampling the interference fringes using dielectric discontinuities on the surface of the waveguide. This allows the recording of the signal on a detector on top of the waveguide, and using dedicated Fourier transform methods to recover the spectrum of the source. All the difficulty is then linked to the length of the interferogram that is sampled. This determines the spectral resolution and the spacing between sampling centers, which are ultimately l…
Improving the vertical radiation pattern issued from multiple nano-groove scattering centers acting as an antenna for future integrated optics Fourie…
2019
The stationary wave integrated Fourier transform spectrometer (SWIFTS) is based on the sampling of a stationary wave using nano-scattering centers on the surface of a channel waveguide. Single nano-scale scattering centers above the waveguide surface will radiate the sampled signal with wide angular distribution, which is not compatible with the buried detection area of infrared (IR) detectors, resulting in crosstalk between pixels. An implementation of multiple diffraction nano-grooves (antenna) for each sampling center is proposed as an alternative solution to improve directivity towards the detector pixel by narrowing the scattering angle of the extracted light. Its efficiency is demonst…
Microsystèmes intégrés en niobate de lithium
2019
Le niobate de lithium (LiNbO3) suscite un vif intérêt en photonique depuis des décennies en raison de ses fortes propriétés électro-optiques et non-linéaires. L’opportunité récente de l’usiner en couches minces a élargi le spectre des applications déjà nombreuses du matériau. Les enjeux actuels concernent la miniaturisation des composants tout en préservant de faibles pertes optiques.
Fabrication et usinage des guides en verre de tellurite pour l'optique non-linéaire intégrée
2021
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