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Optics Letters

Optics Letters


  • Vol. 21, Iss. 10 — May. 15, 1996
  • pp: 695–697

Morphology-dependent resonances of a microsphere–optical fiber system

Giora Griffel, Stephen Arnold, Dogan Taskent, Ali Serpengüzel, John Connolly, and Nancy Morris  »View Author Affiliations

Optics Letters, Vol. 21, Issue 10, pp. 695-697 (1996)

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Morphology-dependent resonances of microspheres sitting upon an index-matched single-mode fiber half-coupler are excited by a tunable 753-nm distributed-feedback laser. Resonance peaks in the scattering spectra and associated dips in the transmission spectra for the TE and TM modes are observed. We present a new model that describes this interaction in terms of the fiber–sphere coupling coefficient and the microsphere’s intrinsic quality factor Q0. This model enables us to obtain expressions for the finesse and the Q factor of the composite particle–fiber system, the resonance width, and the depth of the dips measured in the transmission spectra. Our model shows that index matching improves the coupling efficiency by more than a factor of 2 compared with that of a non-index-matched system.

© 1996 Optical Society of America

Original Manuscript: October 16, 1995
Published: May 15, 1996

Giora Griffel, John Connolly, Nancy Morris, Stephen Arnold, Dogan Taskent, and Ali Serpengüzel, "Morphology-dependent resonances of a microsphere–optical fiber system," Opt. Lett. 21, 695-697 (1996)

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