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:
May. 20, 2008
Filed:
Oct. 29, 2004
Rajminder Singh, Shrewsbury, MA (US);
Ming LI, Chelmsford, MA (US);
Jimmy Yi-jie Jia, Cambridge, MA (US);
Xinbing Liu, Acton, MA (US);
Tetsuo Ohara, Sutton, MA (US);
Rajminder Singh, Shrewsbury, MA (US);
Ming Li, Chelmsford, MA (US);
Jimmy Yi-Jie Jia, Cambridge, MA (US);
Xinbing Liu, Acton, MA (US);
Tetsuo Ohara, Sutton, MA (US);
Matsushita Electric Industrial Co., Ltd, Osaka, JP;
Abstract
A multimode long period fiber Bragg grating (LPFBG) for a predetermined wavelength band. The LPFBG formed of a non-photosensitive material having an initial index of refraction. The multimode optical fiber core includes a substantially cylindrical surface, a longitudinal core axis, a core radius, and a number of index-altered portions having an altered index of refraction different from the initial cladding index of refraction. Each of the index-altered multimode optical fiber core has a first transmission surface and second transmission surface that is substantially parallel to the first transmission surface. Also, these index-altered portions are arranged within the non-photosensitive material of the multimode optical fiber core such that the first transmission surface of one portion of the plurality of index-altered portions is substantially parallel to the second transmission surface of a neighboring portion to form a long period Bragg grating structure.