The timing jitter of 78-GHz optical time-division multiplexed pulses has been evaluated over nine decades of Fourier frequency by the time-domain demodulation technique. For downconverting the 78-GHz pulse intensity into a low-frequency i.f. signal, an optoelectronic harmonic mixing scheme with a Mach–Zehnder intensity modulator was employed. The rms timing jitter has been estimated to be 3.74 ps for 2.5 mHz–18 MHz bandwidth.
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