Two-photon dual-comb LiDAR imaging
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2026
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866915858901630976 |
|---|---|
| author | Nelmes, Alexander J. M. Fletcher, Simon Longstaff, Andrew Charsley, Jake M. Wright, Hollie Reid, Derryck T. |
| author_facet | Nelmes, Alexander J. M. Fletcher, Simon Longstaff, Andrew Charsley, Jake M. Wright, Hollie Reid, Derryck T. |
| contents | Conventional LiDAR uses time-of-flight data from laser pulses scanned across a scene to provide accurate multi-meter-scale three-dimensional models at cm precision, limited by the tens-of-picoseconds precision of time-tagging electronics. Here, by using two-photon dual-comb ranging, we introduce an analog of LiDAR imaging using the time-of-flight of sub-picosecond laser pulses to render cm-scale point-cloud datasets with $μ$m precision. Using only free-running femtosecond lasers, the technique combines absolute accuracy with near-interferometric precision, is applicable to discontinuous surfaces with poor optical quality, and provides a stand-off range exceeding that of other optical metrologies. We demonstrate imaging of an aluminum test object and assess its accuracy by comparing our results with those from a touch-probe coordinate measurement machine. At a stand-off distance of 40 cm, we obtain ranging accuracies of 9 $μ$m - 38 $μ$m, and precisions averaging to 1.0 $μ$m after 500 ms. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_12729 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Two-photon dual-comb LiDAR imaging Nelmes, Alexander J. M. Fletcher, Simon Longstaff, Andrew Charsley, Jake M. Wright, Hollie Reid, Derryck T. Optics Conventional LiDAR uses time-of-flight data from laser pulses scanned across a scene to provide accurate multi-meter-scale three-dimensional models at cm precision, limited by the tens-of-picoseconds precision of time-tagging electronics. Here, by using two-photon dual-comb ranging, we introduce an analog of LiDAR imaging using the time-of-flight of sub-picosecond laser pulses to render cm-scale point-cloud datasets with $μ$m precision. Using only free-running femtosecond lasers, the technique combines absolute accuracy with near-interferometric precision, is applicable to discontinuous surfaces with poor optical quality, and provides a stand-off range exceeding that of other optical metrologies. We demonstrate imaging of an aluminum test object and assess its accuracy by comparing our results with those from a touch-probe coordinate measurement machine. At a stand-off distance of 40 cm, we obtain ranging accuracies of 9 $μ$m - 38 $μ$m, and precisions averaging to 1.0 $μ$m after 500 ms. |
| title | Two-photon dual-comb LiDAR imaging |
| topic | Optics |
| url | https://arxiv.org/abs/2603.12729 |