Chinese Optics Letters, 2019, 17 (9): 091202, Published Online: Jul. 29, 2019
Large-scale absolute distance measurement with dual free-running all-polarization-maintaining femtosecond fiber lasers Download: 1095次
120.0120 Instrumentation, measurement, and metrology 140.4050 Mode-locked lasers 320.7090 Ultrafast lasers
Abstract
We demonstrate a robust femtosecond LIDAR setup by using two free-running environmentally stable all-polarization-maintaining nonlinear amplified loop mirror mode-locked fiber lasers. Based on the asynchronous optical sampling method, a ranging accuracy of ±2 μm within 65 m has been achieved, as tested in an 80-m-long underground optical tunnel. Through the Kalman filter in real-time data processing, the measurement accuracy can be maintained at a 200 Hz update rate. This setup provides a practical tool for various large-scale industrial and astronomical ranging applications.
Yuepeng Li, Yawen Cai, Runmin Li, Haosen Shi, Haochen Tian, Mingzhao He, Youjian Song, Minglie Hu. Large-scale absolute distance measurement with dual free-running all-polarization-maintaining femtosecond fiber lasers[J]. Chinese Optics Letters, 2019, 17(9): 091202.