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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 5, Iss. 11 — Nov. 10, 2007
  • pp: 668–670

Fiber taper coupled high-quality-factor planar microdisk

Xiaowei Wu, Yunfeng Xiao, Yong Yang, Chunhua Dong, Zhengfu Han, and Guangcan Guo  »View Author Affiliations


Chinese Optics Letters, Vol. 5, Issue 11, pp. 668-670 (2007)


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Abstract

A fiber taper can evanescently couple to whispering gallery modes (WGMs) in a planar silica microdisk for observing the optical properties of the microdisk cavity. It is revealed that WGMs have very high quality (Q) factors by controlling the air gap between the taper and the microdisk. The best coupling efficiency from the taper to the microdisk is as high as 98%, and can be continuously adjusted from the under-coupling, critical-coupling to over-coupling regimes. The influence of the laboratory circumstance such as surface contamination on the microdisk is also discussed. It is experimentally shown that the high-Q-factor (100000) modes can be kept for a long period in a general laboratory circumstance.

© 2007 Chinese Optics Letters

OCIS Codes
(120.4640) Instrumentation, measurement, and metrology : Optical instruments
(230.0230) Optical devices : Optical devices
(230.3990) Optical devices : Micro-optical devices

Citation
Xiaowei Wu, Yunfeng Xiao, Yong Yang, Chunhua Dong, Zhengfu Han, and Guangcan Guo, "Fiber taper coupled high-quality-factor planar microdisk," Chin. Opt. Lett. 5, 668-670 (2007)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-5-11-668


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