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:
Aug. 07, 1984
Filed:
Sep. 28, 1982
William L Emkey, Bethlehem, PA (US);
AT&T Bell Laboratories, Murray Hill, NJ (US);
Abstract
A polarization independent optical circulator is disclosed. A first birefringent plate (10) is used to separate an incident beam from a first port into two beams having orthogonal polarizations, and a second plate (11) recombines the beams at a second port. Means (12) providing nonreciprocal rotation of the polarizations are disposed between the plates. Placed between the rotating means and the second plate is a third plate (16) to further separate the beams and a reflecting element (17) for deflecting the beams toward the second port. The reflecting element includes a slotted portion (18) so that light from a third port can pass therethrough back toward the first port.