Micro-pulse polarization lidar at 1.5 μm using a single superconducting nanowire single-photon detector.
Micro-pulse polarization lidar at 1.5 μm using a single superconducting nanowire single-photon detector.
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DOI：
10.1364/ol.42.004454
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发表时间：
2017-11
期刊：
影响因子：
3.6
通讯作者：
J. Qiu;H. Xia;M. Shangguan;X. Dou;Manyi Li;Chong Wang;Xiang Shang;Shengfu Lin;Jianjiang Liu
中科院分区：
文献类型：
--
作者：
J. Qiu;H. Xia;M. Shangguan;X. Dou;Manyi Li;Chong Wang;Xiang Shang;Shengfu Lin;Jianjiang Liu
介绍了一种全光纤、人眼安全的微脉冲偏振激光雷达，该雷达采用保偏结构，并集成了一个1.5 μm的超导纳米线单光子探测器（SNSPD）。时分复用技术用于实现免校准的光学布局。使用单片探测器以交替顺序探测两个正交状态下的反向散射信号。因此，避免了传统偏振激光雷达中两个探测器的定期校准。通过使用SNSPD来保证激光雷达的信噪比，提供高检测效率和低暗计数噪声。在合肥市[N31°50'37“，E117°15' 54”]，当一次重污染从北方向中东部扩散时，观测了48 h的城市气溶胶的线性退偏比（LDR）。在建筑物正在建造的位置处检测到LDR突发的现象。激光雷达探测结果与太阳光度计、532 nm能见度激光雷达探测结果及天气预报信息吻合较好。
An all-fiber, eye-safe and micro-pulse polarization lidar is demonstrated with a polarization-maintaining structure, incorporating a single superconducting nanowire single-photon detector (SNSPD) at 1.5 μm. The time-division multiplexing technique is used to achieve a calibration-free optical layout. A single piece of detector is used to detect the backscatter signals at two orthogonal states in an alternative sequence. Thus, regular calibration of the two detectors in traditional polarization lidars is avoided. The signal-to-noise ratio of the lidar is guaranteed by using an SNSPD, providing high detection efficiency and low dark count noise. The linear depolarization ratio (LDR) of the urban aerosol is observed horizontally over 48 h in Hefei [N31°50'37'', E117°15'54''], when a heavy air pollution is spreading from the north to the central east of China. Phenomena of LDR bursts are detected at a location where a building is under construction. The lidar results show good agreement with the data detected from a sun photometer, a 532 nm visibility lidar, and the weather forecast information.