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10 October 2020 Broadband microwave measurement based on photonic down-conversion sampling
Zhiyao Zhang, Shangjian Zhang, Yali Zhang, Yong Liu
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Proceedings Volume 11555, Real-time Photonic Measurements, Data Management, and Processing V; 115550C (2020) https://doi.org/10.1117/12.2573338
Event: SPIE/COS Photonics Asia, 2020, Online Only
Abstract
Photonic down-conversion sampling is a promising technique that can directly and adaptively transfer a high-frequency microwave signal to a low-frequency replica in the first Nyquist zone, thanks to the large bandwidth of the electro-optic modulator and the ultra-short optical pulse train. Therefore, this technique is beneficial to achieving broadband microwave measurement by using a low-speed photodetector together with a low-frequency and narrowband digital (or analog) receiver. In this presentation, we will discuss broadband high-resolution microwave frequency measurement schemes based on low-speed photonic sampling, which are applicable for multi-tone signal. We will also discuss calibration-free microwave characterization of broadband electro-optic modulators based on low-speed photonic sampling, where the microwave response of either a phase modulator or an intensity modulator can be obtained through low-frequency detection.
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Zhiyao Zhang, Shangjian Zhang, Yali Zhang, and Yong Liu "Broadband microwave measurement based on photonic down-conversion sampling", Proc. SPIE 11555, Real-time Photonic Measurements, Data Management, and Processing V, 115550C (10 October 2020); https://doi.org/10.1117/12.2573338
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KEYWORDS
Microwave radiation
Electrooptic modulators
Fiber lasers
Mode locking
Adaptive optics
Analog electronics
Calibration
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