Fig. 1. Schematic of the composite OMC and the photothermal all optical modulation theory of OMC

Fig. 2. Simulation results of the modulation response of the OMC

Fig. 3. (a) Transmission intensity of the OMC sample during the fabrication process;(b) time-frequency analysis results of port3

Fig. 4. Schematic diagram for the construction of OMC optical intensity modulation system

Fig. 5. Output power of 980 nm laser with different modulation amplitudes

Fig. 6. Change of the coupling ratio of OMC while the intensity modulated 980 nm pump light is injected into the OMC. (a) Test data of OMC coupling ratio; (b) test data of 980 nm pump light intensity

Fig. 7. Local amplification of 1550 nm optical measurement results from the output of OMC port3 under the action of the 980 nm pump light. (a) Port3 test data of OMC; (b) test data of 980 nm pump light intensity

Fig. 8. OMC output monitoring results with the modulation amplitude of the 980 nm pump light gradually increasing. (a) Time domain monitoring signal; (b) "direct current" variation of the OMC output in the modulation process