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. 23, 2001
Filed:
Oct. 04, 1999
Steven P. Bastien, Narragansett, RI (US);
Shijun Jiang, Wakefield, RI (US);
Mala Krishnan, Wakefield, RI (US);
Tariq Manzur, Storrs, CT (US);
Optigain, Inc., Peace Dale, RI (US);
Abstract
An ultra-wide bandwidth optical amplifier for the 1.5 &mgr;m optical band divides the 1520 nm-1610 nm bandwidth into three narrow bandwidths, i.e. C,(1520 nm-1541 nm), C,(1541 nm-1565 nm) and L (1565 nm-1610 nm), and uses three separate erbium doped fiber amplifier blocks, configured in parallel relation and individually optimized to separately amplify the respective bandwidth. Multipath interference is controlled by constructing all three amplifier blocks with the same optical transmission length. The C,and C,band amplifier blocks, which include shorter erbium doped fibers than the L band amplifier block, are physically lengthened using lengths of single mode fiber so that the total length of the optical transmission path of each amplifier block is generally equal. Fiber lengths are controlled to within 500 microns. Selected amplifier blocks further include delay control devices which selectively delay signals passing through the respective amplifier block to provide fine adjustment to signal recombination.