What Is the Difference Between PM Optical Circulators and Isolators?
Polarization maintaining optical circulators and isolators are both important devices for managing light propagation in fiber optic systems. But what exactly sets them apart? This article explains the key differences between polarization-maintaining (PM) optical circulators and isolators and when each is most applicable. Polarization Maintaining Optical Circulators A PM optical circulator is a non-reciprocal three-port