4 Ports 1310nm Polarization Maintaining Optical Circulator

4 Ports 1310nm Polarization Maintaining Optical Circulator

The 4 Ports 1310nm Polarization Maintaining Optical Circulator is a high-performance, non-reciprocal passive optical device designed to route light sequentially from Port 1 → Port 2 → Port 3 → Port 4, while precisely maintaining the polarization state of the transmitted signal. Operating at 1310 nm, this circulator offers low insertion loss, high isolation, and an excellent polarization extinction ratio (PER), ensuring superior performance in polarization-sensitive optical systems.

Built with PM1310 PANDA fiber, the device provides stable polarization alignment — with the slow axis aligned to the key by default — delivering reliable and repeatable optical behavior. Its compact and robust design ensures long-term stability under varying temperature and environmental conditions.

This 4-port polarization-maintaining circulator is ideal for fiber interferometers, fiber laser systems, coherent communication setups, and polarization-sensitive measurement instruments, where precise polarization control and high signal isolation are essential.

Specifications

Note: Measured at 25°C. Data exclude connectors; adding connectors increases insertion loss by 0.3 dB, reduces return loss by 5 dB, and lowers extinction ratio by 2 dB. The PM fiber slow axis is aligned to the key by default.

Dimension Drawing (Unit: mm)