Affiliation:
1. State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University , Xiamen 361102, China
Abstract
A time-multiplexing technique is proposed and demonstrated for single-photon imaging lidar, utilizing a large-area single-pixel single-photon detector to simultaneously detect the multi-pixel echoes. In this time-division multiplexing lidar, the echo signals from different pixels of the fiber array are delayed through fibers of varying lengths, merged into a fiber bundle, and then sequentially detected by the large-area single-pixel detector. In the experimental demonstration, a two-detector system capable of imaging 122 pixels using single-photon imaging lidar was showcased in three-dimensional imaging. Furthermore, the spectral broadening caused by multimode fiber dispersion was analyzed. Imaging of four different targets at a distance of 80 m was experimentally validated. This time-multiplexing technique can greatly reduce the number of single-photon detectors required in imaging lidar systems, making it suitable for low-cost lidar applications.
Funder
National Key Research and Development Program of China
Innovation Program for Quantum Science and Technology
Fujian Provincial Central Guided Local Science and Technology Development Special Project
Joint Funds of the National Natural Science Foundation of China
National Science Foundation of Fujian Provience of China
MEL-RLAB Joint Fund for Marine Science & Technology Innovation
Subject
Physics and Astronomy (miscellaneous)