Neptec’s Polarization Insensitive Optical Circulator is a non-reciprocal device that routes incoming signals from any port to the next. An optical circulator transmits the signal from port 1 to port 2, while simultaneously transmitting signal from port 2 to port 3. Neptec’s optical circulators are used in advanced communication systems like DWDM and bi-directional pumps.

Every network is different. Neptec ensures that every product we sell is highly customizable to fit any optical fiber application. If the standard circulator below do not fit your application, we would be glad to review your specifications and quote a custom circulator for you.

Product Information

Key Features

• Low insertion loss
• Low Polarization Dependent Loss (PDL)
• High isolation
• PM and Non-PM are available
• Customized Configurations For Any Application


• Optical fiber amplifier
• Metropolitan area network
• Dispersion compensation
• Bi-direction communication systems
• Add/Drop Multiplexing



Parameter Unit Typical Notes
Operating Signal Wavelength nm 1310 or 1550 ±20
Insertion Loss dB ≤0.80 (1 → 2 , 2 →3, 3 →4)
Polarization Dependent Loss dB ≤0.10
Polarization Mode Dispersion ps ≤0.06
Isolation dB ≥40 (1 → 2 , 2 →3, 3 →4)
Directivity dB ≥50
Return Loss dB ≥50

Electrical and Environmental Characteristics

Parameter Unit Typical Notes
Operating Temperature Range ◦C (-5) to 70
Storage Temperature Range ◦C (-40) to 85