Absolute Distance Meter Operating on a Free-Running Mode-Locked Laser for Space Mission

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We report a working prototype of absolute distance meter developed for outer-space operation by incorporating a fiber-type modelocked laser. The target distance is measured using a 1 GHz synthetic radio frequency (similar to 0.3 m wavelength) provided by the 20(th) intermode harmonic of a 50 MHz pulse repetition rate. The measurement repeatability is 7 mu m at 1 s averaging with an accuracy of +/- 20 mu m for a 2.5 m target distance. With a 100 Hz update rate, the measurement speed is fast enough to keep track of the target in motion with up to a 1.0 m/s velocity. The prototype is built within a compact volume of A4-size footprint to be feasible for the space mission of satellite-to-satellite distance measurement.
Publisher
KOREAN SOC PRECISION ENG
Issue Date
2018-07
Language
English
Article Type
Article
Keywords

FEMTOSECOND PULSE LASER; FREQUENCY-COMB; REFRACTIVE-INDEX; MACHINE-TOOL; INTERFEROMETRY; METROLOGY; LIGHT; AIR

Citation

INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING, v.19, no.7, pp.975 - 981

ISSN
2234-7593
DOI
10.1007/s12541-018-0115-y
URI
http://hdl.handle.net/10203/244663
Appears in Collection
ME-Journal Papers(저널논문)
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