A two-way dual-comb ranging system measured a 113 km free-space distance with 82 nm precision at 21 s averaging, the first absolute ranging beyond 100 km with sub-micron repeatability.
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113 km absolute ranging with nanometer precision
A two-way dual-comb ranging system measured a 113 km free-space distance with 82 nm precision at 21 s averaging, the first absolute ranging beyond 100 km with sub-micron repeatability.