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A high-sensitivity phase noise measurement scheme using photonic-delay line and digital phase demodulation is proposed, which is free of complicate calibration and amplitude noise by using digital phase demodulation. In the experiment, a phase noise measurement sensitivity as high as −134 dBc/Hz@10 kHz@10 GHz is achieved applying a 2-km single mode fiber as the delay line. Besides, accurate phase...
A photonic-assisted scheme for the phase noise measurement of microwave signal sources is proposed based on the optical delay-line method. In the proposed scheme, all the microwave signal processing is implemented in the optical domain, and the electrical devices that would limit the operation bandwidth and measurement sensitivity are avoided, leading to a large operation bandwidth and a high sensitivity...
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