Intrinsic timing jitter of superconducting nanowire single-photon detectors |
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Authors: | Q Zhao L Zhang T Jia L Kang W Xu J Chen and P Wu |
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Institution: | (1) Tsinghua University, Beijing, China |
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Abstract: | We report on an experimental investigation of the timing jitter (TJ) in a fiber-coupled detection system based on a superconducting
nanowire single-photon detector (SNSPD). We used a picosecond pulsed laser and fiber delay lines to generate subsequent optical
pulsed pairs in each period and measured the TJ between the pulses. Because only the interval time between two pulses in each
period was interested, we did not need to know the absolute time of every pulse. Therefore, the TJ from laser and trigger
signal can be removed. In order to estimate the intrinsic TJ of SNSPD, we analyzed the TJ caused by time distribution of optical
pulse, electronic components, readout noise, kinetic inductance and dispersion in fiber channel. Finally, we obtained the
intrinsic TJs for two kinds of detectors considering these impacts. |
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Keywords: | |
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