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:
Nov. 15, 2016
Filed:
Mar. 16, 2015
Alcatel-lucent Usa Inc., Murray Hill, NJ (US);
Jeffrey H. Sinsky, Marlboro, NJ (US);
Chia-Ming Chang, Matawan, NJ (US);
Alcatel-Lucent USA Inc., Murray Hill, NJ (US);
Abstract
We disclose an optoelectronic circuit that is configurable to operate as an FIR filter, in which the tapping and the weighting of the signal that is being equalized are performed in the optical domain, whereas the summation of the weighted signals is performed in the electrical domain after the corresponding optical signals are converted into electrical form using an array of photodetectors. Photodetectors in the array are arranged such that some of them contribute to the equalized electrical signal with a positive polarity and the others contribute to the equalized electrical signal with a negative polarity. As a result, at least some of the tap weights used in the FIR filter can be made variable between a positive value and a negative value.