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:
Dec. 14, 2004
Filed:
Mar. 17, 2003
Applicant:
Inventor:
François Gonthier, Montreal, CA;
Assignee:
ITF Optical Technologies Inc., Montreal, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 6/26 ; C03B 3/7023 ;
U.S. Cl.
CPC ...
G02B 6/26 ; C03B 3/7023 ;
Abstract
An optical fiber filter ( ) with a non-sinusoidal wavelength response is produced by forming an adiabatic taper in a single mode fiber ( ) and forming non-adiabatic tapers ( ) on slopes at each end of the elongated central region of this adiabatic tape and in the middle of the central region ( ). The non-adiabatic taper ( ) in the middle of the central region ( ) produces a phase shift in the wavelength response leading to non-sinusoidal filtering characteristics. The filter may be combined with a Mach-Zehnder interferometer to produce a Mach-Zehnder device with a non-sinusoidal wavelength response.