3 Ports C+L 1528~1610nm Polarization Maintaining Optical Circulator

3 Ports C+L 1528~1610nm Polarization Maintaining Optical Circulator

The 3 Ports C+L 1528~1610nm Polarization Maintaining Optical Circulator is a high-performance, non-reciprocal passive device that routes light sequentially from Port 1 → Port 2 and Port 2 → Port 3 while maintaining the input polarization state. Designed to operate across the C+L wavelength band (1528–1610 nm), it provides low insertion loss, high isolation, and an excellent polarization extinction ratio (PER), ensuring stable and precise optical signal transmission in broadband polarization-sensitive systems.

Constructed with PM1550 PANDA fiber, this circulator maintains accurate polarization alignment — with the slow axis aligned to the key by default — and delivers outstanding thermal and mechanical stability. Its wide operating bandwidth makes it ideal for use in DWDM systems, coherent communication networks, fiber amplifiers (EDFA/RAMAN), fiber sensors, and optical test instruments, where consistent polarization performance is 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.

Features

Three-port circulator
Low loss, good interchangeability, good inter-pluggability.

Three independent ports
It has low insertion loss, broadband high isolation, and low PDL.
Excellent temperature stability can be used for wavelength addition and subtraction, dispersion compensation, and EDFA applications.

Application Diagrams

Circulator can be used to send optical signals through a single fiber in two directions.
As the picture shows: A Circulator is located at both ends of the fiber. Each Circulator functions to add a signal in one direction while removing the signal in the other.

Dimension Drawing (Unit: mm)