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:
Jun. 08, 1993
Filed:
Mar. 27, 1992
Applicant:
Inventor:
Rolf Rossberg, Schwieberdingen, DE;
Assignee:
Alcatel N.V., Amsterdam, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03B / ;
U.S. Cl.
CPC ...
65-421 ; 65 29 ; 385 28 ;
Abstract
To make a fused fiber coupler (1) which is especially suited as a pump coupler for use in fiber amplifiers, exhibits low sensitivity to polarization, and can be spliced in with low loss, commercially available single-mode fibers are employed. After completion of an elongating process and interruption of heat from a heat supply, the input-fiber pair (fiber ends 4, 5) and the output-fiber (fiber ends 6, 7) of two fused lengths of the fiber (2, 3) are twisted by 180.degree. about their common axis and fixed in this position.