Paper Info
Title
Enhancement In Dynamic Range Of Amplitude-Modulated Continuous-Wave Laser Scanner Having A Coaxial Configuration
Abstract
A laser scanner is a powerful tool for 3-D geometry measurement. The amplitude-modulated continuous-wave (CW) laser scanner, which benefits from high accuracy measurement operating in the intermediate range, is suitable for high-precision 3-D industrial inspection. However, due to the limited dynamic range, laser scanners suffer from data loss and deterioration. This poses challenges for 3-D modeling, conversion of 3-D point cloud data to 3-D solid data, and so on. We chose the operation wavelength in the 1530-nm region. The dynamic range of an amplitude-modulated CW laser scanner was enhanced by the implementation of a combination of a low-noise and high-gain optical preamplifier and p-i-n photodiodes, a pellicle beamsplitter, and automatic gain control using a polarization-independent high-speed variable optical attenuator based on electrooptic ceramics in the receiver. In these manners, receiver sensitivity of -72 dBm was achieved and receiver dynamic range of around 37 dB was realized. We expect that our results contribute to high-definition industrial inspection for Industry 4.0.
Year
DOI
Venue
2021
10.1109/TIM.2020.3011768
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
Keywords
DocType
Volume
Attenuation, dynamic range, erbium-doped fiber amplifiers (EDFAs), gain control, isolators, laser radar, optical reflection, shape measurement
Journal
70
ISSN
Citations 
PageRank 
0018-9456
0
0.34
References 
Authors
0
3
Name
Order
Citations
PageRank
Chao Zhang135163.97
Sze Yun Set201.35
Shinji Yamashita301.35