Use of the sidebands of a mach-zehnder modulator for a FMCW distance measurement
US11162773B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2019 |
| Grant date | Nov 2, 2021 |
| Priority date | — |
| Expiry date | Dec 25, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/212
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A distance measuring method and device, wherein a first and a second laser radiation are generated so that the first laser radiation has a first frequency modulation and the second laser radiation has a second frequency modulation, wherein at least in sections a time derivative of the first frequency modulation is different from a time derivative of the second frequency modulation. In accordance with the invention the first and the second laser radiation are generated by modulating a base radiation by means of an electro-optical modulator, so that an output radiation comprising a carrier component and a plurality of sideband components is produced, wherein a first sideband component provides the first laser radiation and a second sideband component provides the second laser radiation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.