Optical micro-resonator sensor for air velocity measurement

Elie R. Salameh; Jaime Da Silva; M. Volkan Ötügen; Dominique Fourguette

doi:10.1117/12.2582862

5 March 2021 Optical micro-resonator sensor for air velocity measurement

Elie R. Salameh, Jaime Da Silva, M. Volkan Ötügen, Dominique Fourguette

Proceedings Volume 11672, Laser Resonators, Microresonators, and Beam Control XXIII; 116720S (2021) https://doi.org/10.1117/12.2582862
Event: SPIE LASE, 2021, Online Only

Abstract

The proposed sensor utilizes a whispering gallery mode (WGM) resonator to measure velocity-induced non-coherent Doppler shifts in Mie-scattered light from particles moving with the air-flow. The resonator replaces the typical Fabry-Perot instrument to measure the Doppler shift. A prototype sensor was developed and experiments were carried out in an atomizing nozzle with a 25μm-diameter water-droplet-seeded air jet. Individual velocity measurements were made at the center of the nozzle, switching the flow on and off. Preliminary results show promise for the WGM-based velocity sensor concept, which would significantly reduce the size and weight of future Direct-Detection-Doppler systems for air-speed measurement, with possible applications in airborne-platform weather-monitoring and planetary studies.

Conference Presentation

Citation Download Citation

Elie R. Salameh, Jaime Da Silva, M. Volkan Ötügen, and Dominique Fourguette "Optical micro-resonator sensor for air velocity measurement", Proc. SPIE 11672, Laser Resonators, Microresonators, and Beam Control XXIII, 116720S (5 March 2021); https://doi.org/10.1117/12.2582862

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