4 Ports 1550nm Polarization Maintaining Optical Circulator

4 Ports 1550nm Polarization Maintaining Optical Circulator

The 4 Ports 1550nm Polarization Maintaining Optical Circulator is a high-performance, non-reciprocal passive optical device that routes light sequentially from Port 1 → Port 2 → Port 3 → Port 4, while precisely maintaining the polarization state of the transmitted signal. Operating at the 1550 nm wavelength, this device offers low insertion loss, high isolation, high return loss, and an excellent polarization extinction ratio (PER), making it ideal for advanced polarization-sensitive optical systems.

Constructed with PM1550 PANDA fiber, the circulator ensures stable polarization alignment, with the slow axis aligned to the key by default. Its robust design and precision optical alignment deliver exceptional environmental stability, long-term reliability, and consistent performance even under demanding conditions.

This 4-port polarization-maintaining circulator is widely used in DWDM systems, EDFA and Raman amplifiers, coherent communication setups, fiber laser systems, and interferometric sensors, where accurate 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)