20 January 2012 InGaAs/InP single-photon counting module running up to 133 MHz
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We present new circuital solutions for operating InGaAs/InP SPADs at high speed with very fast avalanche quenching time. A compact wide-band pulse generator (mounted close to the detector) is able to gate the SPAD at a repetition frequency from 200 Hz up to 133 MHz. An adjustable amplitude gate-driver allows to trade-off between photon detection efficiency and dark count rate, while a variable gate-width precisely selects the time interval during which the detector is ON. A fast avalanche-quenching scheme, working on both SPAD's anode and cathode, is able to minimize quenching action to less than 1 ns, thus effectively reducing afterpulsing through a decreased total charge flowing through the junction. We integrated all such circuits into a compact detection module, together with a previouslyreported differential read-out electronics for low time-jitter response. The performance of the overall module is good in many different setting points, thus being able to satisfy a wide variety of applications.
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A. Tosi, A. Della Frera, A. Bahgat Shehata, C. Scarcella, F. Acerbi, F. Zappa, "InGaAs/InP single-photon counting module running up to 133 MHz", Proc. SPIE 8268, Quantum Sensing and Nanophotonic Devices IX, 82681S (20 January 2012); doi: 10.1117/12.908406; https://doi.org/10.1117/12.908406

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