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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 37, Iss. 23 — Dec. 1, 2012
  • pp: 4865–4867

Excellent optical thermometry based on short-wavelength upconversion emissions in Er3+/Yb3+ codoped CaWO4

Wei Xu, Zhiguo Zhang, and Wenwu Cao  »View Author Affiliations


Optics Letters, Vol. 37, Issue 23, pp. 4865-4867 (2012)
http://dx.doi.org/10.1364/OL.37.004865


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Abstract

Excited by a 980 nm laser, upconversion emissions centered at 384 ( Er 3 + : G 4 11 / 2 I 4 15 / 2 ) and 408 nm ( Er 3 + : H 2 9 / 2 I 4 15 / 2 ) in Er 3 + / Yb 3 + codoped polycrystalline CaWO 4 were successfully obtained. The G 11 / 2 4 and H 9 / 2 2 states of Er 3 + were verified to be thermally coupled levels, which can emit the shortest wavelength emissions for optical thermometry known so far. Based on the change of their intensity ratio with temperature, an excellent optical thermometer can be designed, which can provide accurate temperature measurement from room temperature up to 873 K. More importantly, the sensitivity achieved here is much higher than reported temperature sensors based on Er 3 + green luminescence.

© 2012 Optical Society of America

OCIS Codes
(160.4760) Materials : Optical properties
(190.7220) Nonlinear optics : Upconversion
(300.2140) Spectroscopy : Emission
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Nonlinear Optics

History
Original Manuscript: September 6, 2012
Revised Manuscript: October 9, 2012
Manuscript Accepted: October 17, 2012
Published: November 22, 2012

Citation
Wei Xu, Zhiguo Zhang, and Wenwu Cao, "Excellent optical thermometry based on short-wavelength upconversion emissions in Er3+/Yb3+ codoped CaWO4," Opt. Lett. 37, 4865-4867 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-23-4865


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