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:
Sep. 10, 1985
Filed:
Apr. 15, 1982
Rolf Gauert, Brunswick, DE;
Werner W Jungbluth, Munster, DE;
Abstract
A ring laser having at least three corner mirrors, of which one carries a ferromagnetic garnet layer on a substrate and is coated with a plurality of interference layers and magnetized at right angles to the ferromagnetic garnet layer. The ring laser is designed in such a way that the corner mirror which carries the ferromagnetic garnet layer acts in reflection as a Faraday cell and, in particular, in that the ferromagnetic garnet layer is subjected to circularly polarized radiation. The circularly polarized radiation may be produced by arranging in front of the corner mirror which carries the ferromagnetic garnet layer a .lambda./4 retarding plate. Another possibility consists in providing those corner mirrors which in the radiation path are adjacent to the corner mirror which carries the ferromagnetic garnet layer with a plurality of interference layers which are arranged in such a way that circularly polarized radiation is converted into linearly polarized radiation by means of a 90.degree. phase shift and vice versa.