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Comb-calibrated frequency-modulated continuous-wave ladar for absolute distance measurements.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Baumann, Esther Giorgetta, Fabrizio Raphael Coddington, Ian R. Sinclair, Laura C. Knabe, Kevin Swann, William C. Newbury, Nathan R. |
| Copyright Year | 2013 |
| Abstract | We demonstrate a comb-calibrated frequency-modulated continuous-wave laser detection and ranging (FMCW ladar) system for absolute distance measurements. The FMCW ladar uses a compact external cavity laser that is swept quasi-sinusoidally over 1 THz at a 1 kHz rate. The system simultaneously records the heterodyne FMCW ladar signal and the instantaneous laser frequency at sweep rates up to 3400 THz/s, as measured against a free-running frequency comb (femtosecond fiber laser). Demodulation of the ladar signal against the instantaneous laser frequency yields the range to the target with 1 ms update rates, bandwidth-limited 130 μm resolution and a ~100 nm accuracy that is directly linked to the counted repetition rate of the comb. The precision is <100 nm at the 1 ms update rate and reaches ~6 nm for a 100 ms average. |
| File Format | PDF HTM / HTML |
| DOI | 10.1364/OL.38.002026 |
| PubMed reference number | 23938965 |
| Journal | Medline |
| Volume Number | 38 |
| Issue Number | 12 |
| Alternate Webpage(s) | https://ws680.nist.gov/publication/get_pdf.cfm?pub_id=911496 |
| Journal | Optics letters |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
