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Optical Link Budget

DWDM optical link budget calculator: estimate the feasibility of a point-to-point fiber link (fiber loss, connectors, splices, margin) without in-line amplification.

Distance

Fiber attenuation

Connectors

Count × loss per connector (dB)

Splices

Count × loss per splice (dB)

Safety margin (dB)

Transmit power (dBm)

Receive sensitivity (dBm)

10.00 dB

Fiber loss

15.20 dB

Total loss

23.00 dB

Available power

7.80 dB

Remaining margin

Link feasible without amplification — 7.80 dB of margin remaining. Maximum reachable distance with this budget: ~71.2 km.

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