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Absolute ranging over 113 km with nanometer precision.

Yan-Wei Chen1,2,3, Meng-Zhe Lian1,2,3, Jin-Jian Han1,2,3

  • 1Hefei National Research Center for Physical Sciences at the Microscale and School of Physical Sciences, University of Science and Technology of China, Hefei 230026, China.

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Summary
This summary is machine-generated.

This study introduces a novel bistatic dual-comb ranging method for precise long-distance measurements up to 113 km. The technique overcomes noise and transmission loss, enabling accurate ranging for applications like satellite formation flying.

Keywords:
high-precision long-distance absolute rangingoptical frequency combprecision metrology

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Area of Science:

  • Optical Metrology
  • Geophysics
  • Astrophysics

Background:

  • Accurate long-distance ranging is vital for satellite formation flying, interferometry, and gravitational-wave detection.
  • Current dual-comb methods achieve high precision over short distances but struggle with long-path transmission loss and noise.

Purpose of the Study:

  • To develop and demonstrate a bistatic dual-comb ranging approach for achieving high-precision measurements over extended distances (113 km).
  • To overcome technical challenges associated with long-distance ranging, including signal loss and environmental noise.

Main Methods:

  • Implementation of a bistatic dual-comb ranging system.
  • Utilizing air dispersion analysis to manage atmospheric effects.
  • Employing a synthetic repetition rate technique to enhance the ambiguity range.

Main Results:

  • Successful ranging demonstration over a 113 km distance.
  • Achieved ranging precision of 11.5 µm @ 1.3 ms, 681 nm @ 1 s, and 82 nm @ 21 s.
  • Validation through comparative analysis of two independent systems.

Conclusions:

  • The proposed bistatic dual-comb ranging method effectively extends high-precision ranging capabilities to over 100 km.
  • This technology holds significant potential for future space research, including space telescope arrays and satellite gravimetry.