Method and system for measuring optical scattering characteristics
US7057714B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2003 |
| Grant date | Jun 6, 2006 |
| Priority date | — |
| Expiry date | Aug 7, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K11/32
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and system for measuring optical scattering characteristics includes coupling a continuous wave laser excitation signal to an optical fiber. Radiation backscattered by the optical fiber in response to the coupled excitation signal is detected to produce a backscattered radiation signal. The backscattered radiation signal is mixed with the excitation signal to produce a mixed signal. The mixed signal is filtered to reduce the magnitude of frequencies other than conjugate mixing frequencies relative to the conjugate mixing frequencies. The filtered signal is digitized and the magnitude of backscattered radiation from a specific portion of the fiber is calculated based on the digitized signal. The temperature of a specific portion of the fiber can be determined from the magnitude of the backscattered radiation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.