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High-accuracy long-distance measurements in air with a frequency comb laser

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Abstract

We experimentally demonstrate that a femtosecond frequency comb laser can be applied as a tool for long-distance measurement in air. Our method is based on the measurement of cross correlation between individual pulses in a Michelson interferometer. From the position of the correlation functions, distances of up to 50 m have been measured. We have compared this measurement to a counting laser interferometer, showing an agreement with the measured distance within 2μm (4×108 at 50 m).

© 2009 Optical Society of America

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