Where is the fiber optic analog channel

Analog fiber optic channels, also known as RF over fiber (RFoF), are available from specialized suppliers and are used to transmit analog signals over long distances with high fidelity.

Suppliers and Products

1. A. A. Lab Systems manufactures analog fiber optic links capable of transmitting general-purpose analog signals with input ranges from 100 mV to ±10V. These links are designed for industrial environments and can operate over distances up to 100 km, with optional current loop interfaces (4–20 mA or 0–20 mA) and bandwidths ranging from 27 kHz to 125 MHz .
2. RP Photonics provides a buyer's guide for fiber-optic links, including analog links. Analog fiber optic systems modulate the optical transmitter with an analog RF signal and are commonly used for connecting remote antennas, cable TV distribution, and radar systems. These links are evaluated based on spurious-free dynamic range, linearity, and noise figure .
3. AXING offers solutions for analog RF signal distribution, such as DVB-C or satellite signals, where optical transmitters convert RF signals into light for long-distance distribution. Optical receivers then convert the signals back to RF for use in buildings or networks .
4. RLH Industries provides 4-channel 4–20 mA fiber converters that transmit multiple analog signals over fiber. These systems feature 10 kHz bandwidth, 16-bit resolution, and are compatible with PLCs, sensors, and other industrial equipment. They support both single-mode and multimode fiber applications and are designed for harsh environments .
5. Texas Instruments and other electronics suppliers offer components and reference designs for wide-band analog fiber optic transmission, suitable for applications like HDTV video, RGB signal distribution, and EMI/EMC-sensitive environments. These systems can handle analog bandwidths up to 150 MHz and distances over long fiber runs .

Applications

• Industrial Automation: Transmitting analog sensor signals over long distances with immunity to electromagnetic interference.
• Broadcast and Cable TV: Distributing RF signals, satellite feeds, or DVB-C signals to multiple locations.
• Telecommunications and Radar: Connecting remote antennas or transmitting wide-band analog signals.
• Medical and Scientific Equipment: High-precision analog signal transmission in EMI-sensitive environments.

How to Procure

• Contact suppliers directly via their websites for product inquiries, pricing, and technical support.
• Use buyer guides like RP Photonics to compare analog fiber optic link products and select based on bandwidth, distance, and signal type.
• For industrial or custom applications, discuss specifications such as input voltage range, number of channels, and environmental requirements with the manufacturer. By selecting the appropriate analog fiber optic link, you can achieve long-distance, low-noise transmission of analog signals for industrial, broadcast, or scientific applications .