Accuracy improvement of imaging lidar based on time-correlated single-photon counting using three laser beams

作者：Chen, Zhaodong; Fan, Rongwei; Li, Xudong; Dong, Zhiwei; Zhou, Zhigang; Ye, Guangchao; Chen, Deying^*

来源：Optics Communications, 2018, 429: 175-179.

DOI：10.1016/j.optcom.2018.08.017

• Lidar
• Ranging accuracy
• Time-correlated single-photon counting
• Optical sensing

Time-correlated single-photon counting (TCSPC) is one of the most active technologies for optical time-of-flight ranging and three-dimensional (3D) imaging. Ranging accuracy is one of the most critical issues of lidar system. We propose a three-laser-beam TCSPC lidar system. Besides the main measuring laser beam, the second beam is used to decrease the error caused by jitter of time synchronization. The third beam has n+0.5 time bins' difference with the main measuring beam, and it is used to correct the error caused by the discrete sampling of time-to-digital converter (TDC). To validate the feasibility of the three-laser-beam TCSPC lidar system, a series of simulation experiments using the scheme is carried out. The results show that this method is effective to improve the ranging accuracy of TCSPC lidar system.

• 出版日期2018-12-15
• 单位黑龙江工程学院; 哈尔滨工业大学