Photon-counting chirped amplitude modulation lidar system using superconducting nanowire single-photon detector at 1550-nm wavelength

Zhou Hui^{1, 3}, He Yu-Hao¹, Lü Chao-Lin¹, You Li-Xing^{1, 3, †}, Li Zhao-Hui², Wu Guang², Zhang Wei-Jun¹, Zhang Lu¹, Liu Xiao-Yu¹, Yang Xiao-Yan¹, Wang Zhen¹

(color online) Frequency spectrum of the IF signal recorded using the spectrum analyzer: (a) frequency spectrum of wide-range, (b) details of the frequency spectrum.