Fig. 1. System block of a broadband source-driven resonant fiber-optic gyroscope with a 3×3 coupler

Fig. 2. RIN of the optical signals at port 1 and port 3 of the 3×3 coupler, as well as the signal after subtraction

Fig. 3. Test result of the FRR resonant curve

Fig. 4. Experimental test result of RIN and sampled data from two ports. (a) Experimental test result of RIN; (b) sampled data from port 1 and port 3

Fig. 5. Simulation and test result of the response curve of the gyroscope

Fig. 6. Gyroscope static test data and Allan deviation analysis result. (a) Static test data; (b) Allan deviation analysis result for 1 h data