3 Ports 1480nm Polarization Maintaining Optical Circulator

3 Ports 1480nm Polarization Maintaining Optical Circulator

The 3 Ports 1480nm Polarization Maintaining Optical Circulator is a high-performance, non-reciprocal passive device that directs light sequentially from Port 1 → Port 2 and Port 2 → Port 3, while maintaining the input polarization state. Operating at 1480 nm, it delivers low insertion loss, high isolation, and excellent polarization extinction ratio (PER), ensuring stable and precise optical signal transmission for polarization-sensitive applications.

Constructed with PM1550 PANDA fiber—optimized for operation around 1480 nm—the circulator maintains reliable polarization alignment, with the slow axis aligned to the key by default. Its compact, robust package and excellent thermal stability make it ideal for integration in demanding optical systems.

This device is widely used in EDFA pump monitoring, fiber laser systems, interferometers, and polarization-sensitive measurement setups, providing superior stability and optical performance in singlemode PM fiber networks.

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)