The strain sensitivity of the fluorescence intensity ratio temperature-sensing technique has been measured to be (2 ∓ 3) × 10<sup>−4</sup>%/με in Yb<sup>3+</sup>-doped fiber, implying a temperature-to-strain cross sensitivity of (2 ∓ 3) × 10<sup>−4</sup> °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
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.6780) Instrumentation, measurement, and metrology : Temperature
(160.5690) Materials : Rare-earth-doped materials
(300.2530) Spectroscopy : Fluorescence, laser-induced
Scott A. Wade, Stephen F. Collins, Kenneth T. V. Grattan, and Gregory W. Baxter, "Strain-Independent Temperature Measurement by Use of a Fluorescence Intensity Ratio Technique in Optical Fiber," Appl. Opt. 39, 3050-3052 (2000)