Optical fiber birefringence measurement method and measurement device, and optical fiber polarization mode dispersion measurement method and optical fiber
US7463346B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2007 |
| Grant date | Dec 9, 2008 |
| Priority date | — |
| Expiry date | Oct 10, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M11/3181
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a method of measurement of the birefringence of an optical fiber, the round-trip Jones matrix R(z) for a first interval (0, z) from a measurement starting point 0 in the optical fiber for measurement to a prescribed position z, and the round-trip Jones matrix R(z+Δz) for a second interval (0, z+Δz) from the measurement starting point 0 to a position z+Δz differing from the position z, are acquired, the eigenvalues ρ1, ρ2 of the matrix R(z+Δz)R(z)−1 are determined, and by computing the following equations (1) and (2),(where φ represents the phase difference between linear polarization components due to birefringence, Δn represents birefringence, and λ represents wavelength), the birefringence in the infinitesimal interval Δz from the position z to the position z+Δz is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.