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:
Apr. 21, 1998
Filed:
Dec. 16, 1996
Applicant:
Inventors:
Assignee:
Optotec S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
385140 ; 385123 ;
Abstract
A fibre optic attenuator (201) with spectral response independent of the incident radiation wavelength is formed by a method comprising a controlled series of compressive stressing and subsequent relaxation, or of relaxation alone, of the core of an optical fibre (30) (which can be of standard type or special type), which is simultaneously softened by local heating produced by a heat source. The application of further heating, in the absence of mechanical stressing of the deformed optical fibre (30), facilitates the attainment of the required attenuation.
Longobardi, Enzo. (1998). Method and apparatus for forming fibre optic attenuators with spectral (U.S. Patent No. 5742725). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5742725
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