Fig. 1. Schematic of the radio-over-fiber system utilizing the power-over-fiber technique based on single-mode optical fiber

Fig. 2. Application of the power-over-fiber technique based on single-mode optical fiber to terminal equipment

Fig. 3. Schematic of the radio-over-fiber system utilizing the power-over-fiber technique based on multimode optical fiber

Fig. 4. Schematic of the radio-over-fiber system utilizing the power-over-fiber technique based on multimode optical fiber and wavelength division multiplexing

Fig. 5. Schematic of applying the radio-over-fiber system utilizing the power-over-fiber technique based on multimode optical fiber and wavelength division multiplexing to muti-service system

Fig. 6. Cross-sectional views of single-mode incident light at the core position of multimode optical fiber. (a) Incident point from single mode pigtail using CL technology; (b) incident point from single mode pigtail using OL technology

Fig. 7. Schematic of the unidirectional radio-over-fiber system utilizing the power-over-fiber technique based on double-clad fiber

Fig. 8. Schematic of the bidirectional radio-over-fiber system utilizing the power-over-fiber technique based on double-clad fiber

Fig. 9. Cross-sectional views of the structures of 1×(2+1) fiber bundle divider and 1×(6+1) fiber bundle divider. (a) Cross-sectional view of 1×(2+1) fiber bundle divider; (b) cross-sectional view of 1×(6+1) fiber bundle divider

Fig. 10. Schematic of the dual channel radio-over-fiber system utilizing the power-over-fiber technique based on double-clad fiber

Fig. 11. Schematic of cross section of seven core optical fiber

Fig. 12. Schematic of the internal T circuit of zero-bias high-speed photodetector