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:
Apr. 22, 2008
Filed:
Jun. 17, 2005
Joanne Y. Law, Sunnyvale, CA (US);
Raymond K. L. Yeung, San Jose, CA (US);
Eric S. Johnstone, Redwood City, CA (US);
Kerry D. Bagwell, Campbell, CA (US);
Joanne Y. Law, Sunnyvale, CA (US);
Raymond K. L. Yeung, San Jose, CA (US);
Eric S. Johnstone, Redwood City, CA (US);
Kerry D. Bagwell, Campbell, CA (US);
Agilent Technologies, Inc., Santa Clara, CA (US);
Abstract
A polarization control system includes a light source that generates two light beams with different polarization states and optical frequencies. A polarization state modulator changes the polarization states of the two light beams. A first detector path generates a first beat signal from the two light beams passing through a first polarizer. A second detector path generates a second beat signal from the two light beams passing through a second polarizer that is oriented substantially orthogonal to the first polarizer. An amplitude detector generates an amplitude beat signal from the first and the second beat signals. The system then uses the amplitude beat signal to determine how to adjust the polarization state modulator in order to generate the first and the second light beams with the desired polarization states.