Fig. 1. Principle of reverse modulation laser communication^[3]

Fig. 2. Composition diagram of reverse modulation laser communication system^[38]

Fig. 3. The relationship between the laser power attenuation and the distance

Fig. 4. Block diagram of the inverse modulation terminal structure^[22]

Fig. 5. Schematic diagram of Angle reflector MRR^[40]

Fig. 6. Physical model of forward defocused light propagation^[38]

Fig. 7. Physical model of backward defocused light propagation^[38]

Fig. 8. Schematic diagram of MQW“cat's eye”reverse modulation optical communication^[42]

Fig. 9. Schematic diagram of MEMS^[42]