Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8948594 | Optics Communications | 2019 | 7 Pages |
Abstract
We propose a frequency-sweeping interferometry (FSI) with single external cavity diode laser that can be used to measure the absolute distances of a dynamic target. Generally, the FSI-Doppler effect induced by target drift restricts the measurement accuracy severely, but the Doppler effect can also be used to measure the actual movement during optical frequency sweeps. Thus, a mathematical model of the Doppler effect in FSI is presented and a novel FSI method based on Doppler beat frequency tracking model is proposed to realize the absolute distance measurement of a dynamic target. The method was verified successfully by measuring vibrating targets of 50â¼5000 Hz at 38 mm in the laboratory.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Xingyu Jia, Zhigang Liu, Zhongwen Deng, Wen Deng, Zhiyong Wang, Zhilong Zhen,