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. 16, 1993
Filed:
Nov. 07, 1991
Applicant:
Inventors:
David J DiGiovanni, Scotch Plains, NJ (US);
Clinton R Giles, Middletown, NJ (US);
Stuart A Kramer, Fair Lawn, NJ (US);
Gerald Nykolak, Brooklyn, NY (US);
Herman M Presby, Highland Park, NJ (US);
Jay R Simpson, Fanwood, NJ (US);
Assignee:
AT&T Bell Laboratories, Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01S / ; H01S / ; G02B / ;
U.S. Cl.
CPC ...
385 27 ; 372-6 ;
Abstract
Indiscriminately exciting the modes of a multi-mode optical fiber amplifier is avoided by an optical fiber amplifier design in which the excitation of pump modes in the core of a multi-mode fiber is controlled by controlling the pump light launching. The pump light is directed substantially along the center axis of a multi-mode fiber within a predetermined launch angle. Rather than exciting all modes, only lower order modes are affected.