Optical Feedback FM-to-AM Conversion with integrated Micro-Ring Resonator for Displacement Sensing Applications - LAAS - Laboratoire d'Analyse et d'Architecture des Systèmes
Article Dans Une Revue Journal of Physics: Conference Series Année : 2024

Optical Feedback FM-to-AM Conversion with integrated Micro-Ring Resonator for Displacement Sensing Applications

Résumé

Abstract In this study, we show the capability of integrated Micro-Ring Resonators (MRRs) to perform frequency-to-amplitude (FM-to-AM) conversion of optical feedback interferometry (OFI) signals with improved signal-to-noise ratio compared to conventional AM OFI signals. Further, contrary to traditional OFI FM-to-AM conversion techniques using gas cell-based edge filters and free-space or fiber Mach-Zehnder Interferometers (MZI), integrated photonic processing offers greater compactness and perturbation resilience, enhancing noise performance through improved temperature control and immunity to parasitic mechanical vibrations. The OFI FM-to-AM conversion was performed with a fabricated silicon nitride MRR of radius 120 μm and a quality factor of 130,000. The FM-to-AM conversion factor achieved was 0.61 GHz −1 , with a noise equivalent displacement of only 4.9 nm for a 1 kHz bandwidth. This demonstration highlights the potential of integrated edge filters to replace traditional freespace and fiber architectures, more prone to environmental perturbations, in OFI signal processing for vibrometric applications.

Dates et versions

hal-04663512 , version 1 (28-07-2024)

Identifiants

Citer

Clement Deleau, Han Cheng Seat, Frederic Surre, Usman Zabit, Pierre-François Calmon, et al.. Optical Feedback FM-to-AM Conversion with integrated Micro-Ring Resonator for Displacement Sensing Applications. Journal of Physics: Conference Series, 2024, 2698 (1), pp.012016. ⟨10.1088/1742-6596/2698/1/012016⟩. ⟨hal-04663512⟩
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