title: Combining sub-Nyquist sampling and chirp decomposition for a high-precision and speed absolute distance measurement method.
abstract: A high-precision and speed absolute distance measurement based on swept-wavelength interferometry is reported. A powerful method combining sub-Nyquist sampling and chirp decomposition for dispersion mismatch compensation is proposed. A standard deviation of 0.72 μm is obtained for the measurement of a target located at 3.9 m, which is better than the traditional method. The measurement can be completed in 1.9 s when the frequency range is 4.26 THz, which is much better than chirp decomposition without sub-Nyquist sampling.
authors.forename: Guodong
authors.initials: G
authors.lastname: Liu
authors.forename: Cheng
authors.initials: C
authors.lastname: Lu
authors.forename: Bingguo
authors.initials: B
authors.lastname: Liu
authors.forename: Fengdong
authors.initials: F
authors.lastname: Chen
authors.forename: Yu
authors.initials: Y
authors.lastname: Gan