Next Article in Journal
Rapid Classification of Wheat Grain Varieties Using Hyperspectral Imaging and Chemometrics
Next Article in Special Issue
A High Peak Power and High Beam Quality Sub-Nanosecond Nd:YVO4 Laser System at 1 kHz Repetition Rate without SRS Process
Previous Article in Journal
Tailored Chip Breaker Development for Polycrystalline Diamond Inserts: FEM-Based Design and Validation
Previous Article in Special Issue
Dependence-Analysis-Based Data-Refinement in Optical Scatterometry for Fast Nanostructure Reconstruction
Open AccessArticle

A Traceable High-Accuracy Velocity Measurement by Electro-Optic Dual-Comb Interferometry

School of Marine Science and Technology, TianJin University, TianJin 300072, China
Beijing Institute of Aerospace Control Devices, Beijing 100854, China
Department of Electrical and Computer Engineering, UC Santa Barbara, CA 93106, USA
Author to whom correspondence should be addressed.
Appl. Sci. 2019, 9(19), 4118;
Received: 20 August 2019 / Revised: 4 September 2019 / Accepted: 19 September 2019 / Published: 2 October 2019
An electro-optic dual-comb Doppler velocimeter for high-accuracy velocity measurement is presented in this paper. The velocity information of the object can be accurately extracted from the change of repetition frequency, which is in the microwave frequency domain and can be locked to an atomic clock. We generate two optical combs by electro-optic phase modulators and trace their repetition frequencies to the rubidium clock. One functions as the measurement laser and the other the reference. Experimentally, we verify its high accuracy in the range of 100–300 mm/s with a maximum deviation of 0.44 mm/s. The proposed velocimeter combines the merits of high accuracy and wide range. In addition, since the repetition frequency used for the measurement is traceable to the rubidium clock, its potential superiority in traceability can be utilized in velocity metrology. View Full-Text
Keywords: electro-optic dual-comb interferometry; laser Doppler velocimetry; Traceability electro-optic dual-comb interferometry; laser Doppler velocimetry; Traceability
Show Figures

Figure 1

MDPI and ACS Style

Xue, B.; Zhang, H.; Zhao, T.; Jing, H. A Traceable High-Accuracy Velocity Measurement by Electro-Optic Dual-Comb Interferometry. Appl. Sci. 2019, 9, 4118.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop