Lixing You, Xiaoyan Yang, Yuhao He, Wenxing Zhang, Dengkuan Liu, Weijun Zhang, Lu Zhang, Ling Zhang, Xiaoyu Liu, Sijing Chen, Zhen Wang, Xiaoming Xie
Jitter is one of the key parameters for a superconducting nanowire single photon detector (SNSPD). Using an optimized time-correlated single photon counting system for jitter measurement, we extensively studied the dependence of system jitter on the bias current and working temperature. The signal-to-noise ratio of the single-photon-response pulse was proven to be an important factor in system jitter. The final system jitter was reduced to 18 ps by using a high-critical-current SNSPD, which showed an intrinsic SNSPD jitter of 15 ps. A laser ranging experiment using a 15-ps SNSPD achieved a record depth resolution of 3 mm at a wavelength of 1550 nm.
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http://arxiv.org/abs/1308.0763
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