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:
Jun. 06, 2006
Filed:
Mar. 15, 2004
Masud Azimi, Belmont, MA (US);
Daryoosh Vakhshoori, Cambridge, MA (US);
Kevin J. Knopp, Newburyport, MA (US);
Gregory Vander Rhodes, Melrose, MA (US);
Peidong Wang, Carlisle, MA (US);
Masud Azimi, Belmont, MA (US);
Daryoosh Vakhshoori, Cambridge, MA (US);
Kevin J. Knopp, Newburyport, MA (US);
Gregory Vander Rhodes, Melrose, MA (US);
Peidong Wang, Carlisle, MA (US);
Ahura Corporation, Wilmington, MA (US);
Abstract
An optical isolator is disclosed for transmitting light in a first direction and blocking light in a second direction along an optical pathway. The optical isolator includes an input polarizer having a pass axis at first angle, an output polarizer having a pass axis at second angle, a Faraday rotator material between the polarizers having a Verdet constant and an axis of maximum length therethrough, generation means for generating a magnetic field around and inside the rotator material, and at least one reflector configured to define an optical length through the rotator material which is longer than the axis therethrough. The optical pathway length through the rotator material, the magnetic field strength, and the Verdet constant are selected so as to rotate light through the Faraday rotator material from the first angle to the second angle.