Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published July 3, 2000 | Published
Journal Article Open

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


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.

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.

Attached Files

Published - CAIprl00.pdf


Files (184.5 kB)
Name Size Download all
184.5 kB Preview Download

Additional details

August 21, 2023
October 13, 2023