Mitigation of Fading Caused by Atmospheric Turbulence with FMF Coupling and Maximum Ratio Combining Used in 320-m Free-Space Optical Transmission of

We experimentally demonstrated the sum of the six modes of FMF improved coupling efficiency by 6.5 dB for the optical beam impaired by 320-m open-air free-space transmission, and fading was suppressed by digital maximum ratio combining for 10 Gb/s BPSK.