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:
Sep. 09, 2003
Filed:
Mar. 04, 2002
Giorgio Ghislotti, Montevecchia, IT;
Stefano Balsamo, Cairo Montenotte, IT;
Salvatore Morasca, Como, IT;
Alberto Ferrari, Menconico, IT;
Corning O.T.I. SpA, Milan, IT;
Abstract
A bidirectionally pumped optical amplifier ( ) comprises an active fibre ( ), a first WDM coupler ( ) and a second WDM coupler ( ), a first pump: branch ( ) coupled to said first WDM coupler ( ) comprising a first laser ( ) and a first grating ( ), for introducing pump radiation into said active fibre ( ) in a first direction, a second pump branch ( ) coupled to said second WDM coupler ( ) comprising a second laser ( ) and a second grating ( ), for introducing pump radiation into said active fibre ( ) in a second direction, opposite to said first direction. The second laser has an output power P . A first pump residual, having a power P , is coupled into said second pump branch ( ) from the active fibre ( ) and injected into said second laser ( ). The first pump branch ( ) further comprises an optical isolator ( ) for the pump radiation. The output power of the injected laser and the injected pump power residual are such that P /P >2.