The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 22, 1998
Filed:
Feb. 14, 1997
Nicolas Gisin, Geneva, CH;
Karin Julliard, Lausanne, CH;
Universite de Geneve, Geneva, CH;
Abstract
The present invention concerns a method and a device for measuring polarization dispersion of an optical fiber which is particularly useful in telecommunications, and which has a finer resolution of this measurement in comparison to methods and devices known in the art. The device consists of an interferometer (51), a low coherent light source (16), a detector (25) for generating an interferogram, and a module (52) connected in series with the optical fiber to be measured (20), this module comprising a high dispersion birefringent fiber (53) of stable, known polarization, two pairs of fiber bundles (55, 56) for adjusting the polarization controller (54) and for aligning the principal polarization modes of the optical fiber to be measured and the birefringent fiber, and an electronic processor (21) for measuring the separation of the lateral peaks on the interferogram resulting as a function of predetermined adjustments to the polarization controller. The polarization dispersion of the fiber to be measured is deduced by measuring the different separation values.