Dual-frequency Doppler lidar for wind detection with a superconducting nanowire single-photon detector
Dual-frequency Doppler lidar for wind detection with a superconducting nanowire single-photon detector
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DOI：
10.1364/ol.42.003541
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发表时间：
2017-09-15
期刊：
影响因子：
3.6
通讯作者：
Pan, Jian-Wei
中科院分区：
文献类型：
--
作者：
Shangguan, Mingjia;Xia, Haiyun;Pan, Jian-Wei
使用 1.5 μm 超导纳米线单光子探测器 (SNSPD) 演示了双频直接探测多普勒激光雷达。所谓双刃技术是通过使用双频激光脉冲来实现的，而不是使用双通道法布里-珀罗干涉仪。对所报道的激光雷达的这种修改增强了系统级别的频率稳定性。采用时分复用方法，光接收机中仅使用一个SNSPD，使系统变得简单且鲁棒。采用SNSPD来提高时间分辨率，因为它具有高量子效率、低暗计数噪声、无后脉冲概率和高最大计数率的优点。使用两台以30度天顶角指向西和北的望远镜来检测视线风分量，用于合成水平风廓线。计算高度约 2.7 km 的水平风廓线，垂直空间/时间分辨率为 10 m/10 s。风动力演化和垂直风切变观测清晰。 (C) 2017年美国光学学会
A dual-frequency direct detection Doppler lidar is demonstrated using a superconducting nanowire single-photon detector (SNSPD) at 1.5 mu m. The so-called double-edge technique is implemented by using a dual-frequency laser pulse, rather than using a double-channel Fabry-Perot interferometer. Such a modification to the reported lidars enhances the frequency stability in the system level. Using the time-division multiplexing method, only one piece of SNSPD is used in the optical receiver, making the system simplified and robust. The SNSPD is adopted to enhance the temporal resolution since it offers merits of high quantum efficiency, low dark count noise, no after-pulsing probability, and a high maximum count rate. Two telescopes that point westward and northward at a zenith angle of 30 degrees are used to detect the line-of-sight wind components, which are used to synthesize the horizontal wind profile. Horizontal wind profiles up to an altitude of about 2.7 km are calculated with vertical spatial/temporal resolution of 10 m/10 s. Wind dynamic evolution and vertical wind shears are observed clearly. (C) 2017 Optical Society of America