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:
Jul. 22, 2014
Filed:
Mar. 30, 2012
Fatih Yaman, Monmouth Junction, NJ (US);
Shaoliang Zhang, Plainsboro, 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;
Fatih Yaman, Monmouth Junction, NJ (US);
Shaoliang Zhang, Plainsboro, 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
A method for optical chirp-free optical polarization modulation includes dividing a data modulated optical signal into a first optical path and a second optical path, using a Mach-Zehnder intensity modulator in the first optical path for imparting a π phase difference between adjacent symbols of the data modulated optical signal in the first optical path, adjusting a delay and amplitude of symbols of the data modulated optical signal in the second path so that the symbols in the first path and the symbols in the second path are synchronized and have substantially equal power levels, and combining the first and second optical paths so that symbols from the first and second optical paths are in orthogonal polarizations.