The 3 Ports 1550nm Polarization Maintaining Optical Circulator is a high-performance, non-reciprocal passive optical device designed to guide light sequentially from Port 1 → Port 2 and Port 2 → Port 3 while preserving the polarization state of the transmitted signal. Operating at 1550 nm, it offers low insertion loss, high isolation, and an excellent polarization extinction ratio (PER), ensuring reliable and accurate optical signal transmission in polarization-sensitive systems.