中国物理B ›› 2018, Vol. 27 ›› Issue (1): 18501-018501.doi: 10.1088/1674-1056/27/1/018501
• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇 下一篇
Hui Zhou(周慧), Yu-Hao He(何宇昊), Chao-Lin Lü(吕超林), Li-Xing You(尤立星), Zhao-Hui Li(李召辉), Guang Wu(吴光), Wei-Jun Zhang(张伟君), Lu Zhang(张露), Xiao-Yu Liu(刘晓宇), Xiao-Yan Yang(杨晓燕), Zhen Wang(王镇)
Hui Zhou(周慧)1,3, Yu-Hao He(何宇昊)1, Chao-Lin Lü(吕超林)1, Li-Xing You(尤立星)1,3, Zhao-Hui Li(李召辉)2, Guang Wu(吴光)2, Wei-Jun Zhang(张伟君)1, Lu Zhang(张露)1, Xiao-Yu Liu(刘晓宇)1, Xiao-Yan Yang(杨晓燕)1, Zhen Wang(王镇)1
摘要:
We demonstrate a photon-counting chirped amplitude modulation (CAM) light detection and ranging (lidar) system incorporating a superconducting nanowire single-photon detector (SNSPD) and operated at a wavelength of 1550 nm. The distance accuracy of the lidar system was determined by the CAM bandwidth and signal-to-noise ratio (SNR) of an intermediate frequency (IF) signal. Owing to a short dead time (10 ns) and negligible dark count rate (70 Hz) of the SNSPD, the obtained IF signal attained an SNR of 42 dB and the direct distance accuracy was improved to 3 mm when the modulation bandwidth of the CAM signal was 240 MHz and the modulation period was 1 ms.
中图分类号: (Superconducting infrared, submillimeter and millimeter wave detectors)