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:
Feb. 16, 2010
Filed:
Mar. 08, 2007
Applicants:
Dongning Wang, Kowloon, HK;
Yiping Wang, Kowloon, HK;
Wei Jin, Kowloon, HK;
Inventors:
Assignee:
Hong Kong Polytechnic University, Kowloon, Hong Kong SAR, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 6/34 (2006.01); G02B 6/26 (2006.01); G02F 1/035 (2006.01);
U.S. Cl.
CPC ...
Abstract
In the present invention, methods and systems for fabricating novel LPFGs are taught. Fabrication is preformed by focusing a COlaser beam having a diameter of 30 to 40 μm onto a fiber, such fiber being fixed and weighted on either ends. The variations of transmission spectrum and polarization dependent (PDL) loss of the COlaser-grooved LPFGs with different fabrication parameters as functions of applied as functions of applied tensile stain are demonstrated and evaluated.