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. 10, 2012
Filed:
Mar. 25, 2010
Philip Nan Ji, Princeton, NJ (US);
Lei Xu, Princeton Junction, NJ (US);
Ting Wang, West Windsor, NJ (US);
Shuji Murakami, Herndon, VA (US);
Tsutomu Tajima, Tokyo, JP;
Yutaka Yano, Tokyo, JP;
Philip Nan Ji, Princeton, NJ (US);
Lei Xu, Princeton Junction, NJ (US);
Ting Wang, West Windsor, NJ (US);
Shuji Murakami, Herndon, VA (US);
Tsutomu Tajima, Tokyo, JP;
Yutaka Yano, Tokyo, JP;
NEC Laboratories America, Inc., Princeton, NJ (US);
Abstract
An optical device includes an interferometer for a received optical differential phase shift keying DPSK signal, and an equalizer integrated with the interferometer in a manner for reducing from optical filtering effects an interference by signal bits of the DPSK signal with signal bits of a contiguous DPSK signal. The interferometer is a Michelson delay interferometer type, but can also be a Mach-Zehnder delay interferometer type on fiber, waveguide or other optical structure. The equalizer is a Fabry-Perot type equalizer, but can be a ring resonator type or a fiber based equalizer.