Q-factor and waveguide-sphere separation effects in waveguide-coupled microsphere resonators

Y. Panitchob; G. Senthil Murugan; M. N. Zervas; J. S. Wilkinson

doi:10.1117/12.799260

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3 April 2008 Q-factor and waveguide-sphere separation effects in waveguide-coupled microsphere resonators

Y. Panitchob, G. Senthil Murugan, M. N. Zervas, J. S. Wilkinson

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Proceedings Volume 6793, International Workshop and Conference on Photonics and Nanotechnology 2007; 67930E (2008) https://doi.org/10.1117/12.799260
Event: International Workshop and Conference on Photonics and Nanotechnology 2007, 2007, Pattaya, Thailand

Abstract

Quality-factors of waveguide coupled microsphere resonators of 30 μm diameter are measured. A Teflon buffer layer is deposited on the waveguide to separate the microsphere from the waveguide and the effect of this separation on the measured quality-factor is discussed. The whispering-gallery mode propagation along the cavity of the microsphere as well as the optical path lengths of the modes are determined; the experimental and theoretical data are compared and discussed. A five-fold increase of the Q-factor was obtained by increasing the sphere-waveguide separation.

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Y. Panitchob, G. Senthil Murugan, M. N. Zervas, and J. S. Wilkinson "Q-factor and waveguide-sphere separation effects in waveguide-coupled microsphere resonators", Proc. SPIE 6793, International Workshop and Conference on Photonics and Nanotechnology 2007, 67930E (3 April 2008); https://doi.org/10.1117/12.799260

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