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:
Mar. 16, 2004
Filed:
Sep. 04, 2002
Lars Gruner-Nielsen, Bronshoj, DK;
Stig Nissen Knudsen, Frederiksberg, DK;
Morten Ostergaard Pedersen, Vallensbaek, DK;
Fitel USA Corporation, Norcross, GA (US);
Abstract
An inverse dispersion fiber is provided that has a relatively low fiber loss, a relatively low fiber splice loss and a relatively large effective mode-field area. The inverse dispersion fiber includes a doped core region with an index of refraction n , a cladding region with an index of refraction n , and a trench region, a first barrier region and a second barrier region with indices of refraction n , n , and n , respectively, formed between the doped core region and the cladding region. The various regions of the inverse dispersion fiber are manufactured in such a way that the refractive index value ranges are, for example, approximately 0.709%<(n −n )/n <1.0%, approximately −0.358%<(n −n )/n <−0.293%, approximately 0.194%<(n −n )/n <0.237%, and approximately −0.045%<(n −n )/n <−0.037%. The inverse dispersion fiber in accordance with the preferred embodiment has a chromatic dispersion of approximately −44 picosecond/(nanometer-kilometer) and a relatively large effective core area, A , that is, for example, greater than approximately 30.0 &mgr;m , both at a wavelength of 1550 nm.