Faraday Rotator Mirror
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What does FRM mean?
Faraday Rotator Mirror (FRM) is a fiber optic polarization rotation mirror designed for fiber optic networks and measurement applications. The State Of Polarization (SOP) of the reflected light is rotated 90 degrees from that of the input light. A unique property of FRP’s is that at any point along the fiber, the state of polarization of the forward going and reflected light are always orthogonal to each other, regardless of the birefringence of the
fiber. Therefore, when properly used, the device can help to eliminate polarization sensitivity
in optical fiber systems.