Radius variation of optical fibers with angstrom accuracy
Optics Letters, Vol. 35, Issue 23, pp. 4006-4008 (2010)
http://dx.doi.org/10.1364/OL.35.004006
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Abstract
We have developed a robust method for the unprecedentedly accurate angstrom-scale detection of local variations of the fiber radius based on the idea suggested by Birks et al. [ IEEE Photon. Technol. Lett.IPTLEL1041-1135 12, 182 (2000)]. The method uses an optical microfiber (MF) translated at a small distance along the tested fiber and periodically touching it at measurement points. At these points, the MF transmission spectrum exhibits whispering-gallery-mode (WGM) resonances shifting with the tested fiber radius. A simple and comprehensive optimization scheme, which determines the radius variation without visual recognition of resonances and treats their shifts simultaneously, is developed. The optics of WGM propagation is discussed, and the condition for the validity of the developed method is established.
© 2010 Optical Society of America
OCIS Codes
(060.2340) Fiber optics and optical communications : Fiber optics components
(130.6010) Integrated optics : Sensors
(140.4780) Lasers and laser optics : Optical resonators
(140.3948) Lasers and laser optics : Microcavity devices
ToC Category:
Fiber Optics and Optical Communications
History
Original Manuscript: August 19, 2010
Revised Manuscript: October 1, 2010
Manuscript Accepted: October 22, 2010
Published: November 23, 2010
Citation
M. Sumetsky and Y. Dulashko, "Radius variation of optical fibers with angstrom accuracy," Opt. Lett. 35, 4006-4008 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-23-4006
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