Distance-independent RF fading compensation using a tunable nonlinearly-chirped FBG in a phase diversity configuration

We use a nonlinearly-chirped fibre Bragg grating (FBG) in a phase diversity configuration to achieve distance-independent RF power fading compensation for double sideband (DSB) subcarrier-multiplexed systems. We demonstrate compensation for RF power fading from 0 to 150 km for 8, 10 and 12 GHz, with received RF power in all cases flat to within 1 dB.