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:
Jan. 16, 2007
Filed:
Sep. 24, 2003
Donald Jablonowski, Dunwoody, GA (US);
David Kalish, Roswell, GA (US);
Jinkee Kim, Norcross, GA (US);
Robert Lingle, Jr., Norcross, GA (US);
Donald Jablonowski, Dunwoody, GA (US);
David Kalish, Roswell, GA (US);
Jinkee Kim, Norcross, GA (US);
Robert Lingle, Jr., Norcross, GA (US);
Fitel U.S.A. Corp., Norcross, GA (US);
Abstract
An improved optical fiber design has been found to exhibit a relatively low attenuation at the wavelength of 1385 nm (the 'water peak'), allowing for Raman amplification to be efficient and effective at wavelengths in the S-band range of 1460 to 1530 nm. An ultra-dry process is used to mate an inner core rod (core plus surrounding trench) with a cladding tube (ring region plus cladding layers) and provide a water peak loss on the order of 0.325 dB/km. The low water peak is combined with appropriate dispersion values and zero dispersion wavelength to form a fiber that supports transmission and Raman amplification in the S-, C- and L-bands of interest for optical transmission systems.