High-Update-Rate (25 kHz) Laser Ranging with Random Noise Modulation for Fast and Precise Absolute Distance Measurement
This paper proposes a technique for precise distance measurement under laser random noise using autocorrelation demodulation. We conducted measurements within a 2 m range using a commercial digitizer with a sampling rate of 40 GS/s. The single signal acquisition time is 40 μs, and the measurement results achieved an accuracy of 30 μm and a standard deviation (SD) of 8 μm. This method can also improve measurement accuracy by increasing the sampling rate and expanding the measurement range by extending the duration of a single sampling.
Authors
- Tianci Liu
- Jian Wu (ORCID: https://orcid.org/0000-0003-3747-7358)
- Xing Jia
- Jidong Weng
- Entao Li (ORCID: https://orcid.org/0000-0003-0666-8557)
- Jia Shi (ORCID: https://orcid.org/0000-0001-7563-9982)
- Zongchen Wang
- W. Chen
- Longhuang Tang (ORCID: https://orcid.org/0000-0002-5436-8754)
- Tianjiong Tao
- Heli Ma
- Xiang Wang (ORCID: https://orcid.org/0000-0002-5718-9575)
- Chengjun Li (ORCID: https://orcid.org/0000-0002-7891-3171)
- Xirui Zhang (ORCID: https://orcid.org/0000-0002-4305-4813)
- Shenggang Liu
- Yongchao Chen (ORCID: https://orcid.org/0000-0001-7792-0989)
Institutions
- Tiangong University (CN)
- China Academy of Engineering Physics (CN)
- Chinese Academy of Engineering (CN)
Publication Details
- Journal
- Sensors
- Published
- 2025-11-15
- DOI
- https://doi.org/10.3390/s25226985
- Primary Topic
- Advanced Optical Sensing Technologies
- Type
- article
- Field-Weighted Citation Impact
- 0.00