BDCOM-OLT

Fiber Loss Budget Calculator

Enter link details to compute estimated optical loss (dB). Works for single-mode or multi-mode—adjust coefficients accordingly.

Wavelength Custom 1310 nm (SMF) 1550 nm (SMF)

System Margin (dB)

Fiber Length (km)

Loss per km (dB/km)

Number of Splices

Loss per Splice (dB)

Number of Connectors

Loss per Connector (dB)

Tx Launch Power (dBm) (optional)

Rx Sensitivity (dBm) (optional)

Tip: Typical single-mode attenuation ≈ 0.35 dB/km @1310 nm and ≈ 0.22 dB/km @1550 nm. Fusion splice ≈ 0.05–0.1 dB; connector ≈ 0.2–0.5 dB.