Optical Link buget calculation

Optical Fiber Link Budget Calculator

📘 Theory

The link budget in optical fiber communication is the total amount of optical power loss that can be tolerated by the system. It considers the transmitted power, fiber attenuation, splices, connectors, and a safety margin.

The received power is calculated using the formula:

Received Power (dBm) = Tx Power (dBm) − [Fiber Loss + Splice Loss + Connector Loss + Margin]

Where:

• Fiber Loss = α × L (in dB), where α is attenuation (dB/km), and L is fiber length (km)
• Splice Loss = Number of Splices × Loss per Splice (dB)
• Connector Loss = Number of Connectors × Loss per Connector (dB)
• Margin is an additional loss (usually 2–3 dB) to ensure reliable operation

Transmitter Power (dBm): Fiber Attenuation (dB/km): Fiber Length (km): Loss per Splice (dB): Number of Splices: Loss per Connector (dB): Number of Connectors: System Margin (dB):