Figure 1

Single-channel microwave signal transmission over a FMF link. (a) Experimental setup. (b) Schematic of the PL. (c) Cross-sectional image of the PL output facet. (d) Output mode profiles of the PL. (e) Refractive-index profile of the FMF specially designed for single-channel transmission. (f) Impulse responses of the FMF excited by input mode LP₀₁, LP₁₁, LP₂₁ and LP₀₂, respectively. Insets are output intensity profiles at the end of the FMF. LD, laser diode; MZM, Mach–Zehnder modulator; OA, optical amplifier; OC, optical circulator; PD, photodetector; PL, photonic lantern.