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:
Apr. 11, 1995
Filed:
May. 03, 1993
Applicant:
Inventors:
David C Hanna, Southampton, GB;
Jeremy N Carter, Kent, GB;
Anne C Tropper, Hants, GB;
Richard G Smart, Hants, GB;
Assignee:
British Telecommunications plc, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01S / ; H01S / ;
U.S. Cl.
CPC ...
359341 ; 372-6 ; 372 40 ; 372 70 ; 359109 ;
Abstract
An optical fibre amplifier comprises a thulium-doped optical fibre pumped at 790 nm by a semi-conductor diode laser coupled to the fibre via optical fibre coupler. The amplifier is optically coupled in series to a pair of systems fibres to provide amplification to optical signals.