532纳米超导纳米线单光子探测器及其在卫星激光测距中的演示。

Superconducting nanowire single photon detector at 532 nm and demonstration in satellite laser ranging.

作者信息

Li Hao, Chen Sijing, You Lixing, Meng Wengdong, Wu Zhibo, Zhang Zhongping, Tang Kai, Zhang Lu, Zhang Weijun, Yang Xiaoyan, Liu Xiaoyu, Wang Zhen, Xie Xiaoming

出版信息

Opt Express. 2016 Feb 22;24(4):3535-42. doi: 10.1364/OE.24.003535.

DOI:10.1364/OE.24.003535

PMID:26907010

Abstract

Superconducting nanowire single-photon detectors (SNSPDs) at a wavelength of 532 nm were designed and fabricated aiming to satellite laser ranging (SLR) applications. The NbN SNSPDs were fabricated on one-dimensional photonic crystals with a sensitive-area diameter of 42 μm. The devices were coupled with multimode fiber (ϕ = 50 μm) and exhibited a maximum system detection efficiency of 75% at an extremely low dark count rate of <0.1 Hz. An SLR experiment using an SNSPD at a wavelength of 532 nm was successfully demonstrated. The results showed a depth ranging with a precision of ~8.0 mm for the target satellite LARES, which is ~3,000 km away from the ground ranging station at the Sheshan Observatory.

摘要

为了满足卫星激光测距（SLR）应用的需求，设计并制造了波长为532nm的超导纳米线单光子探测器（SNSPD）。氮化铌SNSPD是在敏感区域直径为42μm的一维光子晶体上制造的。这些器件与多模光纤（ϕ = 50μm）耦合，在极低的暗计数率<0.1Hz下，系统最大探测效率达到75%。成功演示了使用波长为532nm的SNSPD进行的卫星激光测距实验。结果表明，对于距离佘山天文台地面测距站约3000km的目标卫星LARES，深度测距精度约为8.0mm。