Parallel determination of absolute distances to multiple targets by time-of-flight measurement using femtosecond light pulses

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Distances to multiple targets are measured simultaneously using a single femtosecond pulse laser split through a diffractive optical element. Pulse arrival from each target is detected by means of balanced cross-correlation of second harmonics generated using a PPKTP crystal. Time-of-flight of each returning pulse is counted by dual-comb interferometry with 0.01 ps timing resolution at a 2 kHz update rate. This multi-target ranging capability is demonstrated by performing multi-degree of freedom (m-DOF) sensing of a rigid-body motion simulating a satellite operating in orbit. This method is applicable to diverse terrestrial and space applications requiring concurrent multiple distance measurements with high precision.
Publisher
OPTICAL SOC AMER
Issue Date
2015-10
Language
English
Article Type
Article
Citation

OPTICS EXPRESS, v.23, no.20, pp.25874 - 25882

ISSN
1094-4087
DOI
10.1364/OE.23.025874
URI
http://hdl.handle.net/10203/207529
Appears in Collection
ME-Journal Papers(저널논문)
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