Millimetre-wave repetition-rate optical pulse traingeneration in harmonically modelocked fibre ring laser

The generation of optical pulse trains at millimetre-wave repetition frequencies is demonstrated, using pulse repetition frequency quadrupling in an active harmonically modelocked erbium-doped fibre ring laser. A 32 GHz pulse train was generated using an RF drive frequency of 8 GHz with a measured pulsewidth of < 9 ps and a total jitter of < 0.2 ps.