We analyze the second-order sensitivity effects of a polarimetric temperature sensor and a strain sensor. Such effects are shown to be important for a larger temperature change or strain and are demonstrated by the analysis of the errors between the experimentally measured data and the curves of linear and second-order polynomial regressions, respectively. It is also shown that for a small temperature change or strain, higher accurate values of the two parameters can be obtained only from linear regression. The cross-sensitivity effect is also studied experimentally.
© 1997 Optical Society of America
Jianjun Ma and Weizhong Tang, "Second-order sensitivity effects on optical fiber polarimetric temperature sensor and strain sensor," Appl. Opt. 36, 9010-9013 (1997)