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:
Nov. 28, 2011
Fan Chen, Shanghai, CN;
Fahua Lan, Shanghai, CN;
Huiping LI, Shanghai, CN;
Kevin Dapeng Zhang, Fremont, CA (US);
Fan Chen, Shanghai, CN;
Fahua Lan, Shanghai, CN;
Huiping Li, Shanghai, CN;
Kevin Dapeng Zhang, Fremont, CA (US);
Finisar Corporation, Sunnyvale, CA (US);
Abstract
In an embodiment, a DP-QPSK demodulator includes first, second and third polarization beam splitters ('PBSs') and first, second and third half waveplates ('HWPs'). The first HWP is positioned to receive an output of the first PBS. The second PBS is positioned to receive an output of the first HWP. The second HWP is positioned to receive an output of the second PBS. The third PBS is positioned to receive an output of the second HWP. The third HWP is positioned to receive an output of the third PBS.