This is a kind of magnetically induced optical activity.Įssential characteristics of Faraday isolators are: The vast majority of optical isolators are Faraday isolators, based on the Faraday effect, i.e., a rotation of the polarization direction caused by a magnetic field. Types of Optical Isolators Faraday Isolators Light injected into port 1 will exit at port 2, while input at port 2 will be sent to port 3, and input to the last port back to port 1. optical fibers.Ī variant is an optical circulator ( Faraday circulator), having at least three optical ports. Many isolators are used with free-space beams, while others are coupled to waveguides, e.g.
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