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:
Jun. 03, 2003
Filed:
Mar. 12, 2001
Corrado P. Dragone, Little Silver, NJ (US);
Lucent Technologies Inc., Murray Hill, NJ (US);
Abstract
A wavelength slicer uses a waveguide grating router having a periodic arrangement of reflectors in the output circular boundary of the router, which causes each input signal to pass twice through the router. The slicer includes two interleaved sets of equally spaced reflectors. Each set is slightly displaced from the output curve, and their displacements are properly chosen so as to effectively produce a phase shift of &pgr;/2 between the reflected signals. The reflected signals again pass through the router to produce two separate signals, containing respectively the even and odd channels of the input signal. A second slicer embodiment is realized using two gratings that are coupled to elliptical and circular reflectors. A wavelength filter is realized by forming on the output curve a set of equally spaced reflectors with spacing equal to an integer fraction of the spacing of the images.