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:
Oct. 26, 1999
Filed:
May. 06, 1998
Carl Edward Gaebe, Fleetwood, PA (US);
Sun-Huan Huang, Maidencreek Township, Berks County, PA (US);
Kimberly A Miller, Fleetwood, PA (US);
Thomas Stanley Stakelon, Allentown, PA (US);
Gary T Wiand, East Conventry Township, Chester County, PA (US);
Lucent Technologies, Inc., Murray Hill, NJ (US);
Abstract
A system for providing efficient coupling between an elliptical mode laser source and a single mode transmission fiber is disclosed. In one embodiment, the system comprises a cruciform cylindrical lens formed as a pair of perpendicular cylindrical lenses to provide for separate magnification of the 'fast' diverging component (i.e., this component passes through a 'fast' cylindrical lens) and the 'slow' diverging component of the beam (i.e., this component passes through a 'slow' cylindrical lens). By decoupling the magnification requirements of the components of the elliptical beam, the beam may be transformed into an essentially circular beam, appropriate for coupling into a single mode fiber. In one arrangement of the present invention, a coupling efficiency of approximately 90% is possible (as compared with prior art coupling efficiency of about 44%). In an alternative embodiment, the pair of cylindrical lenses may be replaced by a monolithic lens, formed to comprise orthogonal front and rear cylindrical surfaces.