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A frequency-multiplying radio frequency (RF) source based on the optoelectronic oscillator (OEO) with low phase noise has been proposed and experimentally demonstrated. With the optical carrier suppression process, the frequency quadrupling can be achieved by biasing the intensity modulators at the minimum transmission point simultaneously inside and outside the OEO loop. In the proof-of-concept experiment,...
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...
A novel optical pulse generator with high-rate and low-jitter is proposed based on the optoelectronic oscillator using a cascaded polarization modulator and phase modulator. Optical pulses with 10 GHz repetition rate and 29 ps width are demonstrated. According to the single-sideband phase noise of the generated microwave signal, 169 fs time jitter of the generated pulses in the 100 Hz to 1 MHz frequency...
In this letter, we proposed and experimentally demonstrated a novel self-oscillating triangular pulse generator based on a 90° photonic-assisted phase shifter. The fundamental harmonic is produced by the optoelectronic oscillation loop for generating triangular pulses. Meanwhile, the even-order harmonic suppression and the phase matching between odd-order harmonics are simultaneously realized by carrier...
In this letter, we proposed and experimentally demonstrated a novel self-oscillating triangular pulses generator based on dual-parallel Mach-Zehnder modulator (DPMZM). The fundamental harmonic of triangular pulses is produced by self-oscillating optoelectronic loop. Even-order harmonics suppression and phase-shifting of the odd-order harmonics are simultaneously realized by carrier phase-shifted double...
In this paper, we proposed and experimentally demonstrated a novel bias drift free optoelectronic oscillator (OEO) based on Sagnac loop. In the experiment, we built a Sagnac loop as the modulator of OEO where a phase modulator was used to introduce non-reciprocity without bias drift problem. 10 GHz microwave signals with relatively pure spectrum were generated and the measured phase noise was −82dBc/Hz...
A dynamic compensation scheme based on fixed servo-control loop is proposed and demonstrated in the present paper to improve the long-term stability of the wideband and tunable optoelectronic oscillator. Low frequency reference is employed to monitor and extract the phase drift of the long fiber link. The frequency drift of the OEO is compensated by tuning the laser wavelength. The final experiment...
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