Photonic generation of low phase noise millimeter-wave signal based on an ultrahigh Q optoelectronic hybrid bandpass filter

摘要

A millimeter-wave (mmW) optoelectronic oscillator employing ultra-high Q optoelectronic hybrid bandpass filter is proposed. The novel filter with Q value of 30000, bandwidth of 1 MHz and centre frequency of 29.99 GHz has been demonstrated. Based on this ultra-narrow bandpass filter, a 29.99 GHz millimetre-wave signal is successfully generated with the single-sideband phase noise about -113 dBc/Hz at 10 kHz frequency offset. Besides, the measurement results show that the spurs in the mmW oscillator has been suppressed effectively, and the spurious suppression ratio reaches more than 83 dBc.