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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 16 — Jun. 1, 2008
  • pp: 3009–3014

Micro-optical force sensor concept based on whispering gallery mode resonators

Tindaro Ioppolo, Michael Kozhevnikov, Vadim Stepaniuk, M. Volkan Ötügen, and Valery Sheverev  »View Author Affiliations


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 d λ / d F = 7.664 nm / N was demonstrated with a 960 μm hollow PMMA sphere.

© 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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