Pal, Suchandan, Sun, Tong, Grattan, Kenneth, Wade, Scott A, Collins, Stephen F, Baxter, Gregory W, Dussardier, Bernard and Monnom, Gerard (2003) Bragg grating performance in Er–Sn-doped germanosilicate fiber for simultaneous measurement of wide range temperature (to 500 °C) and strain. Review of scientific instruments, 74 (11). pp. 4858-4862. ISSN 0034-6748

Abstract

A fiber-optic sensing scheme for the simultaneous measurement of strain and a wide range of temperatures has been investigated by combining the properties of the fiber Bragg grating (FBG) and the fluorescence from a rare-earth-doped photosensitive fiber. The temperature-dependent fluorescence peak power ratio of the two peaks occurring around 1535 nm and 1552 nm from the amplified spontaneous emission due to the [sup 4]I[sub 13/2]↔[sup 4]I[sub 15/2] transitions in Er[sup 3+]-doped tin–germanosilicate fiber, with 980 nm pumping, and the dual functionality of the FBG were exploited in this scheme. The sensor is based on a single FBG written in a small length (∼10 cm) of the above fiber, which can be used for the simultaneous measurement of strain and temperature over ranges of 0–1150 μ[variant_greek_epsilon] and 22–500 °C, with root-mean-square errors of 36 μ[variant_greek_epsilon] and 6 °C, respectively

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