Article Dans Une Revue Journal of Optics Année : 2018

Coupling analysis of high Q resonators in add-drop configuration through cavity ringdown spectroscopy

Résumé

An original method able to fully characterize high-Q resonators in an add-drop configuration has been implemented. The method is based on the study of two cavity ringdown (CRD) signals, which are produced at the transmission and drop ports by wavelength sweeping a resonance in a time interval comparable with the photon cavity lifetime. All the resonator parameters can be assessed with a single set of simultaneous measurements. We first developed a model describing the two CRD output signals and a fitting program able to deduce the key parameters from the measured profiles. We successfully validated the model with an experiment based on a fiber ring resonator of known characteristics. Finally, we characterized a high-Q, home-made, MgF2 whispering gallery mode disk resonator in the add-drop configuration, assessing its intrinsic and coupling parameters.

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hal-01940112 , version 1 (12-03-2020)

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Gabriele Frigenti, Mojtaba Arjmand, Andrea Barucci, Francesco Baldini, Simone Berneschi, et al.. Coupling analysis of high Q resonators in add-drop configuration through cavity ringdown spectroscopy. Journal of Optics, 2018, 20 (6), pp.065706. ⟨10.1088/2040-8986/aac459⟩. ⟨hal-01940112⟩
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