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:
Feb. 06, 2001
Filed:
Dec. 04, 1998
Charles K. Asawa, Pacific Palisades, CA (US);
Jane K. Asawa, Pacific Palisades, CA (US);
Mike H. Asawa, Pacific Palisades, CA (US);
Other;
Abstract
This invention relates to optical fiber communication systems where data light is launched into a very small set of the lowest order propagation modes of multimode graded-index fibers, resulting in very high data rate transmission capability. We have determined, experimentally and theoretically, that light launched into a small set of a few lowest order propagation modes, or launched only into the fundamental propagation mode of multimode graded-index fiber, converts into and within a limited small set of lowest order modes due to severe bending perturbations that may occur in deployed multimode graded-index fiber transmission cable. Low modal time dispersion of the limited small set of lowest order modes is much less than when all modes of the multimode graded-index fiber are launched, yielding a much higher data rate transmission capability. Added advantages are: low transmission loss, low modal noise, and data security. Methods for launching the small set of lowest order propagation modes or the fundamental propagation modes into a single multimode graded-index fiber or into a plurality of multimode fibers in other optical fiber communication networks are described.