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. 02, 2013
Filed:
Jul. 29, 2010
Sasha N. Kemmet, Adel, IA (US);
Jin-wei Tioh, Ames, IA (US);
Mani Mina, Ames, IA (US);
Robert J. Weber, Boone, IA (US);
Sasha N. Kemmet, Adel, IA (US);
Jin-Wei Tioh, Ames, IA (US);
Mani Mina, Ames, IA (US);
Robert J. Weber, Boone, IA (US);
Iowa State University Research Foundation, Inc., Ames, IA (US);
Abstract
A fiber-based, magneto-optic (MO) optical modulator or switch based on Sagnac interferometry is provided. The system uses a magneto-optic Faraday rotator (MOFR) to produce optical modulation with low magnetic fields. The Sagnac geometry allows for increased modulation at lower fields than traditional MO modulators. This switch uses the MOFR to create different states of polarization in counter-propagating waves, which results in interference at the output port. A magnetic field is used to control the amount of rotation in the state of polarization (SOP), and therefore, the ON-OFF extinction ratio.