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Strain-independent temperature measurement by use of a fluorescence intensity ratio technique in optical fiber

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Abstract

The strain sensitivity of the fluorescence intensity ratio temperature-sensing technique has been measured to be (2 ± 3) × 10-4%/με in Yb3+-doped fiber, implying a temperature-to-strain cross sensitivity of (2 ± 3) × 10-4 °C/με. The near-zero strain sensitivity means that this optical-fiber sensor technique is well suited for temperature measurement in strain-affected environments.

© 2000 Optical Society of America

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