Paper 13100-92
Paper 13100-92
Mid infrared SWIFTS : L-band (3.4 - 4.1 μm) integrated high resolution spectrometer
20 June 2024 • 13:50 - 14:05 Japan Standard Time | Room G214, North - 2F
Abstract
This work aims to present two different mid-IR (L-band) high resolution miniature integrated spectrometers, based on the novel Gabor approach of SWIFTS (Stationary Wave Integrated Fourier Transform Spectrometer). A stationary wave is obtained by injecting the light from the source on both sides of a channel waveguide. The stationary wave is sampled by nano-scattering centres (= nano-grooves) placed on top of the waveguide, that extract the interferogram : the spectrum of the source is then retrieved through a Fourier Transform. Ultrafast laser writing and ion-diffusion are used to fabricate two types of waveguides in Lithium Niobate substrates, an electro-optic crystal, that allows to finely scan the fringe packet under the sampling centres when an electric field ramp is applied.
Presenter
Myriam Bonduelle
Institut de Planétologie et d'Astrophysique de Grenoble (France)
I am a final year PhD student at IPAG (Institute for Planetary sciences and Astrophysics) in Grenoble, France. My PhD falls within the domain of astrophotonics, specifically on the design, development, and characterisation of mid infrared (L band : 3.4 μm - 4.1 μm) waveguides, in order to implement on-chip high resolution spectrometers (SWIFTS) and interferometric recombination chips. Astrophotonics uses photonics techniques and devices (fibres, integrated chips, waveguides, allowing for a better collection and manipulation of the light) to implement new instruments for astrophysical observations. It is a rapidly growing field, and combining it with the L-band, that presents several key characteristics interesting in astrophysics, notably for the imaging and atmospheric characterisation of young exo-planetary systems, will allow for more compact instruments, easing their integration on ground or, even more so, space based projects.