Micro-optical force sensor concept based on whispering gallery mode resonators
Applied Optics, Vol. 47, Issue 16, pp. 3009-3014 (2008)
http://dx.doi.org/10.1364/AO.47.003009
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Abstract
A micro-optical force sensor concept based on the morphology-dependent shifts of optical modes of dielectric microspheres is investigated. The optical resonances, commonly referred to as the whispering gallery modes (WGM), were excited by evanescently coupling light from a tunable diode laser using a tapered single-mode fiber. A compressive force applied to the sphere induces a change in both the shape and the index of refraction of the sphere leading to a shift in WGM. By tracking the shifts, the force magnitude is determined using solid silica as well as solid and hollow Polymethyl-methacrylate (PMMA) microsphere resonators. A measurement sensitivity as high as
© 2008 Optical Society of America
OCIS Codes
(230.3990) Optical devices : Micro-optical devices
(350.3950) Other areas of optics : Micro-optics
(140.3948) Lasers and laser optics : Microcavity devices
(230.4555) Optical devices : Coupled resonators
(280.4788) Remote sensing and sensors : Optical sensing and sensors
ToC Category:
Micro-optical Devices
History
Original Manuscript: March 18, 2008
Manuscript Accepted: April 9, 2008
Published: May 22, 2008
Citation
Tindaro Ioppolo, Michael Kozhevnikov, Vadim Stepaniuk, M. Volkan Ötügen, and Valery Sheverev, "Micro-optical force sensor concept based on whispering gallery mode resonators," Appl. Opt. 47, 3009-3014 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-16-3009
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