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SENKO’s Mini Fiber Optical Circulator features a compact size and high performance over wide wavelength band. The component can transmit the incoming signal from port1 to port2, and another incoming signal from port2 to port3. It’s widely used in combination with fiber gratings and other reflective components in DWDM and bi-directional communication systems.

  • Low Insertion Loss
  • Telcordia Compliant
  • High Channel Isolation
  • Optical Path Epoxy Free
Operating Wavelength (nm) 1290~1330 or 1530~1570
Maximum Insertion Loss (dB) 0.8
Minimum Isolation at 23°C (dB) 45
Minimum Cross Talk (dB) 50
Return Loss (dB) ≥55
Maximum Polarization Dependant Loss at 23°C (dB) 0.1
Operating Temperature (°C) -5~+70
Storage Temperature (°C) -40~+85
Fiber Type Corning SMF-28e 250µm bare fiber
Package Dimensions (mm) 5.5(Ø) x 50(L) for bare fiber

1. For device with connectors, IL will be specified 0.3 dB higher and RL will be 5dB Lower.

Optical Network Protection and Storage

Network Switching

Instrumentation for Test and Measurement

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A fiber optic circulator is three-port devise that is designed to take the signal and route it to the adjacent channel. When the light enters port 1, it is routed to port 2. When the light enters port 2, it is routed to port 3. When the light enters port 3, it is routed to port 1. Its main function is to separate optical signals that are traveling in opposing directions.


Circulators can often be found in networks where bi-directional transmission is needed. Due to the high isolations and low insertion loss of the optical circulator, it is a great choice in advanced communication systems.