BER Assessment of Direct Optical Passband Filter for 24 GHz Millimetre-Wave Signals

Bit Error Rate measurements are performed on a 155 MB/s signal modulating a 24 GHz microwave carrier after filtering using a superimposed fibre Bragg grating for assessment of the performance of such an all-optical filter. This passband filter has a 2 GHz 3-dB bandwidth, steep flanks and a low insertion loss. The extinction ratio is better than 15 dB. The filtering of an interference signal is demonstrated as a function of frequency. Transmission through 25 km standard fibre is shown to not have significant effect on the quality of the signal after filtering.