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:
Feb. 07, 2006
Filed:
Jul. 29, 2004
Poh-boon Phua, Medford, MA (US);
Eleanor L. Haus, Legal Representative, Lexington, MA (US);
Erich P. Ippen, Belmont, MA (US);
Poh-Boon Phua, Medford, MA (US);
Eleanor L. Haus, legal representative, Lexington, MA (US);
Erich P. Ippen, Belmont, MA (US);
Massachusetts Institute of Technology, Cambridge, MA (US);
Abstract
A PMD device includes a first stage that receives a signal and performs rotation about {1,0,0} on the signal. The first stage outputs a first signal. A second stage receives the first signal and performs a rotation about {0,0,1} on the first signal. The second stage outputs a second signal that represents the alignment the PMD of various frequencies into a common direction. A third stage receives the second signal and provides the necessary frequency dependent variable in the {1,0,0} direction to cancel the PMD in any specified frequency range.