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