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:
Aug. 12, 2014
Filed:
Feb. 23, 2011
Hongbin Zhang, Marlboro, NJ (US);
Jin-xing Cai, Morganville, NJ (US);
Yu Sun, Lansdale, PA (US);
Carl R. Davidson, Warren, NJ (US);
Yi Cai, Jackson, NJ (US);
Georg Heinrich Mohs, East Brunswick, NJ (US);
Hongbin Zhang, Marlboro, NJ (US);
Jin-Xing Cai, Morganville, NJ (US);
Yu Sun, Lansdale, PA (US);
Carl R. Davidson, Warren, NJ (US);
Yi Cai, Jackson, NJ (US);
Georg Heinrich Mohs, East Brunswick, NJ (US);
Tyco Electronics Subsea Communications LLC, Eatontown, NJ (US);
Abstract
In general, optical communication systems and methods may generate higher-level nQAM from nQAM signals using one or more delay line interferometers (DLIs) arranged in various configurations. The nQAM signals may be generated by a lower-level modulator, such as a BPSK modulator, QPSK modulator or lower-level QAM modulator, with binary driving signals. Different parameters of the DLIs, such as free spectral range (FSR), phase shift, and amplitude imbalance, may be selected to accomplish the desired higher-level nQAM depending upon the nQAM signal.