Fig. 1. Structural diagram of FOCT with passive phase modulator

Fig. 2. Structural diagram of non-reciprocal passive phase modulator

Fig. 3. Structural diagram of Jones matrix of FOCT

Fig. 4. Effect of phase offset on output waveform. (a) Without phase offset; (b) with phase offset in counterclockwise direction; (c) with phase offset in clockwise direction

Fig. 5. Scheme for phase detection

Fig. 6. Analysis chart of system variation error. (a) Compound zero-order wave plate & Faraday rotators with different temperature characteristics; (b) true zero-order wave plate & Faraday rotators with different temperature characteristics; (c) multiple-order wave plate & Faraday rotators with different temperature characteristics

Fig. 7. Effect of temperature on system output response and phase offset. (a) Variations of output phase of phase modulator and detection light intensity; (b) variations of system change ratio error and phase output error

Table 1. Angle parameters (compound zero-order wave plate)