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:
Oct. 28, 2014
Filed:
Jun. 14, 2012
Shaoliang Zhang, Plainsboro, NJ (US);
Fatih Yaman, Monmouth Junction, NJ (US);
Lei Xu, Princeton Junction, NJ (US);
Ting Wang, West Windsor, NJ (US);
Yoshihisa Inada, Tokyo, JP;
Takaaki Ogata, Tokyo, JP;
Yasuhiro Aoki, Tokyo, JP;
Shaoliang Zhang, Plainsboro, NJ (US);
Fatih Yaman, Monmouth Junction, NJ (US);
Lei Xu, Princeton Junction, NJ (US);
Ting Wang, West Windsor, NJ (US);
Yoshihisa Inada, Tokyo, JP;
Takaaki Ogata, Tokyo, JP;
Yasuhiro Aoki, Tokyo, JP;
NEC Laboratories America, Inc., Princeton, NJ (US);
Abstract
An inventive method for multi-symbol polarization switching for differential detection optical systems includes modulating a laser source by a DQPSK modulator, driving the DQPSK modulator with a data block configured for generating multi-symbol polarization-switched DQPSK differential-encoded signals, and polarizing the multi-symbol polarization-switched DQPSK signals with a polarizing modulator whose modulation speed is based on how often polarization states vary, wherein the data block provides a bits manipulation to provide the multi-symbol polarization switching thereby enabling differential detection for recovering correct original data by a receiver.