PM Isolators

PM Isolators (Polarization Maintaining Isolators) are devices used in optical systems to isolate and protect optical signals in optical systems. Unlike conventional isolators, PM Isolators have the additional feature of being able to maintain the polarization state of optical signals.

In fiber optic communication systems, optical signals usually have a specific polarization state, such as linear or circular polarization. Conventional isolators usually do not take into account the polarization state of the optical signal, but for some applications, especially in polarization multiplexing (PDM) optical communication systems, it is critical to maintain the polarization state of the optical signal.