Multi-wavelength time domain reflectometer
US4904864A · kind A · utility
15Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1987 |
| Grant date | Feb 27, 1990 |
| Priority date | — |
| Expiry date | Dec 10, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D18/004
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical time domain reflectometry system in which laser level reference signals are derived from the respective laser outputs from the laser sources and fed into a single receiver provided for receiving the back-scattered or returned light along an optical fibre. The receiver is thus continuously calibrated in accordance with the relative intensities of the optical signals at different frequencies being launched into the optical fibre so that the receiver provides an accurate measurement of temperature or other parameter being measured by the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.