Wavelength normalization of fiber-optic loss measurements
US5032025A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 7, 1990 |
| Grant date | Jul 16, 1991 |
| Priority date | — |
| Expiry date | May 7, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M11/3145
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of normalizing fiber-optic loss measurements for wavelength uses a measured wavelength for a laser, a desired wavelength for the loss measurement, and a characteristic parameter for the fiber optic cable to perform a first order correction of the Rayleigh scattering from the fiber optic cable. The actual loss is measured using the laser and then corrected to produce the equivalent loss at the desired wavelength according to the equation EQU Ld=La+(Lm/1-La)(.lambda.m/.lambda.d).sup.4 where Ld is the desired loss, La is the characteristic loss for the fiber optic cable, 1 is the length of the fiber optic cable, .lambda.m is the measured wavelength and .lambda.d is the desired wavelength. The resulting equivalent loss is displayed in an alphanumeric and/or a symbolic format.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.