NDLI: Mode coupling strength in a microsphere cavity coupled with fiber taper

Content Provider	IEEE Xplore Digital Library
Author	Xiao-Wei Wu Chang-Ling Zou Yong Yang Chun-Hua Dong Yun-Feng Xiao Zheng-Fu Han Guang-Can Guo
Copyright Year	2008
Description	Author affiliation: Key Lab. of Quantum Inf. of CAS, Univ. of Sci. & Technol. of China, Hefei (Xiao-Wei Wu; Chang-Ling Zou; Yong Yang; Chun-Hua Dong; Yun-Feng Xiao; Zheng-Fu Han; Guang-Can Guo)
Abstract	With the coupled-mode theory, we analyzed the energy transmission between the microsphere cavity and waveguide system, and revealed the mode coupling strength in a bare microsphere coupled with a fiber taper theoretically and experimentally. In a practical taper-microsphere coupling system, the traveling wave clockwise (CW) and counterclockwise (CCW) whispering gallery modes (WGMs) should existed simultaneity. Those two modes are coupled in the microsphere cavity with a coupling strength (beta). In experiment, the reflection spectra of the taper-microsphere system were investigated, By modifying various coupling condition for microspheres, different groups of data were obtained from the spectra, and used as fitting data for coupling strength estimation. The theory will be valuable in evaluating the upper limit of quality factor (Q) of a microcavity basing on the WGMs. Referring to the result and consequence of beta, it enables multiple ways to improve the Q-factor of a real cavity like annealing. Because the experiment device is compact and sensitive, such method is also promising for detecting the propagating loss in fiber instead of traditional way.
Starting Page	213
Ending Page	216
File Size	485551
Page Count	4
File Format	PDF
ISBN	9781424426256
DOI	10.1109/ICTON.2008.4598771
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-06-22
Publisher Place	Greece
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Couplings Cavity resonators Optical fibers Optical fiber theory Fitting Q factor Reflection couple-mode theory whispering gallery mode microsphere mode coupling
Content Type	Text
Resource Type	Article

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