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. 17, 2007
Filed:
May. 21, 2003
Christi Kay Madsen, South Plainfield, NJ (US);
Christi Kay Madsen, South Plainfield, NJ (US);
Lucent Technologies Inc., Murray Hill, NJ (US);
Abstract
A new filter architecture uses subband division and a reflector structure. A de-multiplexer/multiplexer combination creates N subband branches comprising dispersive elements, phase control elements, and/or delay elements. The new structure yields high spectral accuracy across the filter's overall free spectral range (FSR). In one embodiment of the inventive filter, the overall filter has a free spectral range (FSR) of F, and the first multiband filter (MBF) has a FSR of The N subband outputs of the first multiband filter create a plurality of branches. Each branch comprises a dispersive element and optionally one or more elements such as a phase control element and/or a delay element. A reflector at the end of each of these branches reflects the light back through the branches and each of the MBFs and the first MBF.