A novel and simple fiber-optic sensor based on a superstructure fiber grating for simultaneous measurement of temperature, axial strain, and transverse load is proposed and demonstrated. By measurement of the shift and split of broadband and narrow-band loss peaks, one can determine the temperature, axial strain, and transverse load simultaneously over the ranges 0–140°, 0–1200με, and 0–0.3 kg/mm, respectively.
© 2001 Optical Society of America
(050.2770) Diffraction and gratings : Gratings
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(120.6780) Instrumentation, measurement, and metrology : Temperature
(130.6010) Integrated optics : Sensors
Hao Chi, Xiao-Ming Tao, Dong-Xiao Yang, and Kang-Sheng Chen, "Simultaneous measurement of axial strain, temperature, and transverse load by a superstructure fiber grating," Opt. Lett. 26, 1949-1951 (2001)