Loss determination in microsphere resonators by phase-shift cavity ring-down measurements

Year: 2008

Authors: Barnes J., Carver B., Fraser J., Gagliardi G., Loock H.P., Tian Z., Wilson M., Yam S., Yastrubshak O.

Autors Affiliation: Department of Chemistry, Queen’s University, Kingston, ON, K7L 3N6, Canada; Department of Physics, Queen’s University, Kingston, ON, K7L 3N6, Canada; Consiglio Nazionale delle Ricerche-Istituto Nazionale di Ottica Applicata (INOA), Pozzuoli (Naples), Italy; Department of Electrical and Computer Engineering, Queen’s University, K7L 3N6, Canada

Abstract: The optical loss of whispering gallery modes of resonantly excited microresonator spheres is determined by optical lifetime measurements. The phase-shift cavity ring-down technique is used to extract ring-down times and optical loss from the difference in amplitude modulation phase between the light entering the microresonator and light scattered from the microresonator. In addition, the phase lag of the light exiting the waveguide, which was used to couple light into the resonator, was measured. The intensity and phase measurements were fully described by a model that assumed interference of the cavity modes with the light propagating in the waveguide. (C) 2008 Optical Society of America.

Journal/Review: OPTICS EXPRESS

Volume: 16 (17)      Pages from: 13158  to: 13167

More Information: We thank Photonics Research Ontario (Ontario Centres of Excellence) for financial support of this work. Contributions from the Canadian Institute for Photonic Innovations (CIPI), from the Natural Science and Engineering Research Council (NSERC) are acknowledged by the Canadian researchers. GG also acknowledges financial support from the Italian Ministry for Education, University and Research (PON-SIMONA) and assistance from the Consiglio Nazionale delle Ricerche by the RSTL-project and the short term-mobility program.
KeyWords: Light measurement; Phase measurement; Phase shift; Waveguides; Whispering gallery modes, Cavity mode; Cavity ring down; Cavity-ring down techniques; Lifetime measurements; Light scattered; Micro resonators; Microsphere resonators; Phase lags; Resonators,; Article; Computer aided design; Computer simulation; Electronics; Equipment; Equipment design; Instrumentation; Light; Optics; Radiation scattering; Refractometry; Theoretical model; Transducer, Computer Simulation; Computer-Aided Design; Equipment Design; Equipment Failure Analysis; Light; Miniaturization; Models, Theoretical; Optics; Refractometry; Scattering, Radiation; Transducers
DOI: 10.1364/OE.16.013158

Citations: 24
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