Frequency synthesis-based optical frequency domain reflectometry method and system
US10461850B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 5, 2016 |
| Grant date | Oct 29, 2019 |
| Priority date | — |
| Expiry date | Jan 5, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/35361
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Frequency synthesis-based optical frequency domain reflectometry method and system are disclosed. The method is to implement optical frequency reflectometry and comprises: performing an electro-optic modulation and an acousto-optic modulation on a local light to obtain an optical pulse; inputting the optical pulse as a detection pulse optical signal to a test optical fiber; and detecting an obtained Rayleigh backscattered optical signal under coherent detection with the local light, and then performing a photoelectric conversion and a demodulation, wherein: the electro-optic modulation is performed by using a single frequency signal; the acousto-optic modulation is performed by using a pulse signal; and the optical pulse is obtained by simultaneously sweeping multiple frequency components of an optical comb signal which is obtained by the electro-optic modulation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.