3 Ports 1550nm Singlemode Polarization Insensitive Optical Circulator

3 Ports 1550nm Singlemode Polarization Insensitive Optical Circulator

The 3 Ports 1550nm Singlemode Polarization Insensitive Optical Circulator is a high-performance non-reciprocal passive device designed to control the direction of light transmission in singlemode fiber systems. It routes optical signals sequentially from Port 1 → Port 2 and Port 2 → Port 3 with minimal insertion loss and excellent isolation, ensuring efficient signal separation and high channel integrity.

Operating at 1550nm, the most widely used wavelength in optical communication systems, this circulator maintains stable performance regardless of input polarization state. With its low insertion loss, high return loss, and polarization-insensitive design, it is ideal for DWDM networks, EDFA amplifiers, OTDR measurement systems, and fiber sensing applications, where reliable unidirectional light routing is critical.

Specifications

Note: Test environment: 25°C. Data shown exclude connectors. Adding connectors will increase insertion loss by 0.3dB and reduce return loss by 5dB.

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)