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. 28, 1977
Filed:
Mar. 15, 1976
Rodney D Henry, Orange, CA (US);
Rockwell International Corporation, El Segundo, CA (US);
Abstract
Mode conversion of optical signals in thin film optical devices is obtained in a region of Faraday effect magnetic material waveguide by providing a periodic structure in which alternate half cycles have the magnetization parallel to the propagation direction to turn on the Faraday effect to induce mode conversion and in which the intervening half cycles have the magnetization perpendicular to the propagation direction to turn off the Faraday effect to prevent mode conversion. Stripe domains are preferably used to turn the Faraday effect off. Non-reciprocal mode conversion is obtained by optically coupling an anisotropic crystal to the waveguide to provide a quantity of mode conversion equal to that provided by the Faraday effect.