Figure 1 | Scientific Reports

Figure 1

From: Highly Stable Wideband Microwave Extraction by Synchronizing Widely Tunable Optoelectronic Oscillator with Optical Frequency Comb

Figure 1

Schematic for wideband microwave extraction by synchronizing OEO with an OFC using an optical phase detector.

OC: optical circulator; PM: phase modulator; FR: Faraday rotator; QWP: quarter-wave plate; frep: repetition frequency. A microwave generated from a widely tunable OEO is synchronised with the harmonics of an OFC by an optical phase detector. The feedback error signal from the optical-microwave phase detector is used to finely adjust the OEO and to lock the OEO to the harmonics of the OFC. Extremely stable microwaves are extracted from the OFC at an arbitrary harmonic frequency.

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