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Cross dual-microcomb dispersion interferometry ranging.

Yang Wang1,2, Jindong Wang3, Jingsheng Huang4

  • 1State Key Laboratory of Ultrafast Optical Science and Technology, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119, China.

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Summary
This summary is machine-generated.

This study introduces a novel cross dual-microcomb ranging method. It eliminates asynchronous measurement error and extends the non-ambiguity range for high-precision distance measurements.

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Area of Science:

  • Optics and Photonics
  • Metrology
  • Laser Physics

Background:

  • Soliton microcombs are advanced laser sources for high-precision ranging.
  • High repetition rates, while beneficial, limit the non-ambiguity range (NAR).
  • Existing dual-comb methods extend NAR but introduce asynchronous measurement error (AME), degrading accuracy.

Purpose of the Study:

  • To propose a cross dual-microcomb absolute ranging scheme.
  • To eliminate AME in dynamic measurements.
  • To extend the NAR for high-precision, long-distance ranging.

Main Methods:

  • Utilizing a dispersion-interferometry method.
  • Implementing a cross dual-microcomb configuration.
  • Employing one-shot spectral sampling to eliminate AME.

Main Results:

  • Achieved complete elimination of AME during dynamic measurements.
  • Extended the NAR from 3 millimeters to 339 meters using the Vernier effect.
  • Demonstrated Allan deviation down to 5.63 nanometers after 56 seconds of averaging.

Conclusions:

  • The proposed scheme effectively eliminates AME and significantly extends the NAR.
  • The method shows potential for straightforward chip integration and minimal detector needs.
  • Offers an advanced approach for future high-precision, long-distance ranging and miniaturized lidar systems.