The Basics of RFoF Links: How RF Over Fiber Technology Works
Radio Frequency over Fiber (RFoF) is a modern approach to transporting RF signals over long distances by converting them into optical signals, transmitting them through fiber optic cable, and then converting them back to RF at the destination. This technique combines the flexibility of RF communication with the low loss, high bandwidth, and EMI immunity of fiber optics — making RFoF links ideal for mission-critical applications.
How RFoF Links Work
An RFoF link consists of three core components:
Optical Transmitter – Converts the incoming RF signal into a modulated optical signal using a laser.
Fiber Optic Cable – Transports the optical signal over long distances with minimal attenuation.
Optical Receiver – Converts the optical signal back to RF at the output.
This enables real-time, low-latency RF over fiber transmission over distances up to 30 km or more — far beyond the capabilities of traditional coaxial cable.
Advantages of RF Over Fiber Technology
Long-Distance Signal Transmission
Optical fibers offer extremely low signal loss, allowing RFoF links to span tens of kilometers without the need for repeaters or amplifiers.
Immunity to Electromagnetic Interference (EMI)
Since data is transmitted as light, optical RF transport is unaffected by EMI, making RFoF ideal for environments with heavy electrical noise.
High Bandwidth and Frequency Range
RFoF systems support wide frequency ranges — from tens of kHz up to 6 GHz — suitable for applications like satellite communications, broadcasting, and 5G wireless.
Secure and Tamper-Resistant
Fiber is difficult to tap undetected, enhancing the security of sensitive signal paths.
Where Are RFoF Links Used?
Satellite Communications (Satcom)
RFoF transports L, S, C, X, Ku, K, and Ka band IF signals between remote antennas and ground control equipment. Learn more about our Satcom solutions.
5G/4G Wireless Networks
Our RFoF products support signal distribution in cellular and DAS environments up to 6 GHz.
Broadcasting & Media
Use RFoF links to distribute high-fidelity broadcast signals with minimal distortion.
Public Safety Wireless
Ensure resilient communications for first responders by connecting base stations via secure, interference-free RFoF links.
Optical Zonu RFoF Solutions
OZ510 Standard RFoF Links
Supports 30 MHz–3 GHz transmission with optional LNA for improved signal performance.
OZ10x Mini RFoF Links
Compact and low power, with optional 6 GHz extended range. Perfect for field systems and antenna testing.
OZ52x High-Frequency RFoF Links
Handles signals up to 6 GHz, with digital attenuators and remote control capabilities.
CWDM RFoF Links
Multiplex up to 18 RF channels over a single fiber. Ideal for environments where fiber availability is limited.
All Optical Zonu RFoF products are designed and built in the U.S.A., backed by a one-year warranty and expert engineering support.
Final Thoughts
RFoF links provide a superior solution for transporting RF signals over long distances, offering minimal signal degradation, high fidelity, and unmatched flexibility. Whether for military, commercial, or enterprise use, Optical Zonu has a solution tailored to your unique application.
Visit our full RFoF product lineup or contact us to discuss your specific system requirements.