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:
May. 24, 2011
Filed:
Apr. 25, 2007
Benny Mikkelsen, Newton, MA (US);
Pavel Mamyshev, Morganville, NJ (US);
Christian Rasmussen, Shrewsbury, MA (US);
Fenghai Liu, Nashua, NH (US);
Benny Mikkelsen, Newton, MA (US);
Pavel Mamyshev, Morganville, NJ (US);
Christian Rasmussen, Shrewsbury, MA (US);
Fenghai Liu, Nashua, NH (US);
Mintera Corporation, Acton, MA (US);
Abstract
An optical receiver includes a demodulator having a delay interferometer comprising an optical input that receives a phase modulated optical signal from a bandwidth limited transmission system. The delay interferometer has a free spectral range that is larger than a symbol rate of the phase modulated optical signal by an amount that improves receiver performance. The receiver also includes a differential detector having a first and a second photodetector. The first photodetector is optically coupled to the constructive optical output of the delay interferometer. The second photodetector is optically coupled to the destructive optical output of the delay interferometer. The differential detector combines a first electrical detection signal generated by the first photodetector and a second electrical detection signal generated by the second photodetector to generate an electrical reception signal.