Fig. 1. Circular photoelastic modulator

Fig. 2. Diagram of system light path

Fig. 3. Steady state simulation results of 60 kHz elastic light modulator

Fig. 4. PEM Vibration mode and fast axis direction during the period

Fig. 5. Damped string vibration model

Fig. 6. Vibration surface displacement of elastic crystal in different fast axis

Fig. 7. Structure diagram of the new support device

Fig. 8. Optical path system

Fig. 9. The result of two piezoelectric actuator respectively bringing the PEM to the resonant frequency

Fig. 10. Signal in pure traveling wave modulation mode and signal after FFT processing