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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 25 — Dec. 5, 2011
  • pp: 25792–25798

Whispering gallery modes in a glass microsphere as a function of temperature

L. L. Martín, C. Pérez-Rodríguez, P. Haro-González, and I. R. Martín  »View Author Affiliations

Optics Express, Vol. 19, Issue 25, pp. 25792-25798 (2011)

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Microspheres of Nd3+ doped barium titano silicate glass were prepared and the whispering gallery mode resonances were observed in a modified confocal microscope. A bulk sample of the same glass was calibrated as temperature sensor by the fluorescence intensity ratio technique. After that, the microsphere was heated by laser irradiation process technique in the microscope and the surface temperature was estimated using the fluorescence intensity ratio. This temperature is correlated with the displacement of the whispering gallery mode peaks, showing an average red-shift of 10 pm/K in a wide range of surface temperatures varying from 300 K to 950K. The limit of resolution in temperature was estimated for the fluorescence intensity ratio and the whispering gallery mode displacement, showing an improvement of an order of magnitude for the second method.

© 2011 OSA

OCIS Codes
(230.5750) Optical devices : Resonators
(280.6780) Remote sensing and sensors : Temperature
(130.3990) Integrated optics : Micro-optical devices

ToC Category:

Original Manuscript: July 21, 2011
Revised Manuscript: October 13, 2011
Manuscript Accepted: October 21, 2011
Published: December 2, 2011

Virtual Issues
Vol. 7, Iss. 2 Virtual Journal for Biomedical Optics

L. L. Martín, C. Pérez-Rodríguez, P. Haro-González, and I. R. Martín, "Whispering gallery modes in a glass microsphere as a function of temperature," Opt. Express 19, 25792-25798 (2011)

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