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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.
Science Advances
|August 15, 2025
Summary
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.
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.
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