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:
Mar. 07, 2006
Filed:
Apr. 05, 2005
Joanne Y. Law, Sunnyvale, CA (US);
Kerry D. Bagwell, Campbell, CA (US);
Eric S. Johnstone, Redwood City, CA (US);
Elizabeth A. Nevis, Lake Oswego, OR (US);
Joanne Y. Law, Sunnyvale, CA (US);
Kerry D. Bagwell, Campbell, CA (US);
Eric S. Johnstone, Redwood City, CA (US);
Elizabeth A. Nevis, Lake Oswego, OR (US);
Agilent Technologies, Inc., Palo Alto, CA (US);
Abstract
A polarization control system includes a beam source that generates a first beam component containing light with a first polarization and a first frequency and a second beam component containing light with a second polarization and a second frequency. A polarization state modulator adjusts the polarizations of the components for transmission on a single optical fiber. A detector system measures polarizations of the components when output from the optical fiber and determines how to adjust the polarization state modulator in order to give the first and the second components the desired output polarization states. The beam source can be implemented using a Zeeman-split laser, a laser containing a birefringent element, a pair of phase-locked lasers, and/or a variety of configurations of electro-optic or acousto-optic crystals operated to create or enhance the frequency difference between the beam components.