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Observation of Critical Coupling in a Fiber Taper to a Silica-Microsphere Whispering-Gallery Mode System

Cai, Ming and Painter, Oskar and Vahala, Kerry J. (2000) Observation of Critical Coupling in a Fiber Taper to a Silica-Microsphere Whispering-Gallery Mode System. Physical Review Letters, 85 (1). pp. 74-77. ISSN 0031-9007. http://resolver.caltech.edu/CaltechAUTHORS:CAIprl00

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Abstract

We present the observation of critical coupling in a high-Q fused-silica microsphere whispering-gallery mode resonator coupled to a fiber taper. Extremely efficient and controlled power transfer to high-Q (∼10^7) resonators has been demonstrated. Off-resonance scattering loss was measured to be less than 0.3%. On-resonance extinction in transmitted optical power through the fiber coupler was measured as high as 26 dB at the critical coupling point. This result opens up a range of new applications in fields as diverse as near-field sensing and quantum optics.


Item Type:Article
Additional Information:©2000 The American Physical Society Received 17 December 1999 This work was supported by DARPA and the Office of Naval Research. K.J.V. thanks A. Yariv for helpful discussions.
Record Number:CaltechAUTHORS:CAIprl00
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:CAIprl00
Alternative URL:http://dx.doi.org/10.1103/PhysRevLett.85.74
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:2012
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:02 Mar 2006
Last Modified:18 Sep 2014 18:11

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