Absolute laser ranging by time-of-flight measurement of ultrashort light pulses [Invited]

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Ultrashort pulse lasers are emerging as an advanced tool of distance measurement, with their unique temporal and spectral characteristics being extended to diverse principles of absolute ranging and instrumentation. Here, a systematic methodology is presented for absolute ranging by means of the time-of-flight measurement of ultra-short light pulses using dual-comb asynchronous optical sampling. Based on an elaborate uncertainty analysis, influencing system parameters such as the pulse duration, repetition rate, and averaging time are optimized to achieve a sub-mu m measurement accuracy. The absolute ranging system developed in this study demonstrates a combined standard uncertainty of 0.986 mu m for a 0.5 ms averaging over a distance range of 3.0 m, with a further reduction to 0.056 mu m when the averaging time is increased to 0.5 s. The outstanding performance leads to unprecedented multitarget applications: machine feed control with thermal error compensation in real time as well as the nondestructive inspection of multilens assembly in a production line.
Publisher
OPTICAL SOC AMER
Issue Date
2020-09
Language
English
Article Type
Article
Citation

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION, v.37, no.9, pp.B27 - B35

ISSN
1084-7529
DOI
10.1364/JOSAA.395157
URI
http://hdl.handle.net/10203/276651
Appears in Collection
ME-Journal Papers(저널논문)
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