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15 February 2022 Self-calibrated characterization of high-speed photodetectors based on slowly-varying-envelope photonic sampling
Mengke Wang, Ying Xu, Yutong He, Yali Zhang, Zhiyao Zhang, Shangjian Zhang, Yong Liu
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Proceedings Volume 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021); 121665G (2022) https://doi.org/10.1117/12.2617539
Event: Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 2021, Hong Kong, Hong Kong
Abstract
A slowly-varying-envelope photonic sampling method is proposed for hyperfine and ultra-wideband frequency response measurement of high-speed photodetectors (PDs). The measuring frequency range of PD is firstly divided into several segments by the repetition frequency fr of a mode-locked laser diode (MLLD), and the hyperfine frequency response measurement of the PD in every segment is then achieved by applying a slowly-varying-envelope microwave modulation sweeping up to fr/2, which is also independent of the uneven responses of the MLLD and the Mach-Zehnder modulator (MZM). Finally, through carefully choosing the joint-frequency of photonic sampling, the ultra-wideband frequency response of the PD can be obtained with the help of seamlessly stitching different segments. Most importantly, the frequency response of the PD at any frequency can be measured by subtly changing the frequency of photonic sampling from DC to fr/2. Moreover, the measuring frequency range of the PD can be extended by 2(n+1)-fold relative to the modulation frequency range of the MZM, where the microwave frequency swept up to fr/2 enables the measuring frequency range up to (n+1)fr.
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Mengke Wang, Ying Xu, Yutong He, Yali Zhang, Zhiyao Zhang, Shangjian Zhang, and Yong Liu "Self-calibrated characterization of high-speed photodetectors based on slowly-varying-envelope photonic sampling", Proc. SPIE 12166, Seventh Asia Pacific Conference on Optics Manufacture and 2021 International Forum of Young Scientists on Advanced Optical Manufacturing (APCOM and YSAOM 2021), 121665G (15 February 2022); https://doi.org/10.1117/12.2617539
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KEYWORDS
Calibration
Modulation
Photodetectors
Electro optics
Mode locking
Modulators
Signal detection
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