Journal
SCIENCE
Volume 359, Issue 6378, Pages 884-+Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.aao1968
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Funding
- Defense Advanced Research Projects Agency under the SCOUT program [W911NF-16-1-0548]
- Air Force Office of Scientific Research
- Kavli Nanoscience Institute
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Laser-based range measurement systems are important in many application areas, including autonomous vehicles, robotics, manufacturing, formation flying of satellites, and basic science. Coherent laser ranging systems using dual-frequency combs provide an unprecedented combination of long range, high precision, and fast update rate. We report dual-comb distance measurement using chip-based soliton microcombs. A single pump laser was used to generate dual-frequency combs within a single microresonator as counterpropagating solitons. We demonstrated time-of-flight measurement with 200-nanometer precision at an averaging time of 500 milliseconds within a range ambiguity of 16 millimeters. Measurements at distances up to 25 meters with much lower precision were also performed. Our chip-based source is an important step toward miniature dual-comb laser ranging systems that are suitable for photonic integration.
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