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. 31, 2012
Filed:
Dec. 06, 2008
Lars Gruner-nielsen, Bronshoj, DK;
Lars Gruner-Nielsen, Bronshoj, DK;
OFS Fitel, LLC, Norcross, GA (US);
Abstract
A stretcher fiber includes a core region, inner trench region, ring region, outer trench region, and outer cladding region. The core region has a radius r, a refractive index n, and a positive effective refractive index Δnwith respect to an outer cladding region having an outer radius rand a refractive index n, where Δnis equal to n−n. The inner trench region surrounds the core region and has an outer radius r, a refractive index nless than n, and a negative effective refractive index Δnequal to n−n. The ring region surrounds the trench region and has an outer radius r, a refractive index ngreater than n, and a positive effective refractive index Δnequal to n−n. The outer trench region surrounds the ring region and has an outer radius r, a refractive index nless than n, and a negative effective refractive index Δnequal to n−n. The outer cladding region surrounds the outer trench region. The values of r, r, r, r, r, Δn, Δn, Δn, and Δncause the fiber to have a negative dispersion and to have a relative dispersion slope greater than 0.005 nmat a specific wavelength within a selected operating wavelength band. Additionally, the stretcher may be used in combination with a second fiber to match the dispersion and RDS of a selected grating compressor.