Fig. 1. Experimental setup. C1, C2, circulators; DAQ, data acquisition system.

Fig. 2. (a) Measured BFS and (b) calculated axial strain and axial-strain-induced birefringence of the fiber-optic gyroscope coil as temperature increases from −20°C to 60°C.

Fig. 3. (a) Measured BireFS and birefringence and (b) calculated birefringence variations of the fiber-optic gyroscope coil as temperature increases from −20°C to 60°C.

Fig. 4. Dependence of birefringence on temperature.

Fig. 5. Calculated transverse-strain-induced birefringence of the fiber-optic gyroscope coil as temperature increases from −20°C to 60°C.

Fig. 6. Birefringence changes at the peak induced by axial strain and transverse strain at −20°C.