4 Ports 1480nm Polarization Maintaining Optical Circulator

4 Ports 1480nm Polarization Maintaining Optical Circulator

The 4 Ports 1480nm Polarization Maintaining Optical Circulator is a high-performance, non-reciprocal passive optical device designed to direct light sequentially from Port 1 → Port 2 → Port 3 → Port 4, while precisely maintaining the polarization state of the transmitted signal. Operating at 1480 nm, it provides 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, this circulator ensures stable polarization alignment, with the slow axis aligned to the key by default, offering exceptional optical stability and repeatability. Its compact, robust structure and precision optical design guarantee long-term reliability and consistent performance even under varying temperature and environmental conditions.

This 4-port PM circulator is widely used in EDFA and Raman amplifiers, fiber laser systems, DWDM networks, coherent communication modules, and optical measurement instruments, where precise polarization control and unidirectional light transmission are critical for optimal performance.

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)