Calculators
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Fiber distance calculator
Fiber distance calculator
Optical power budget, per-element losses and the maximum run that still closes with margin.
Link
Fiber type
OM3 multimode (850nm) — 3 dB/km
OM4 multimode (850nm) — 2.5 dB/km
OS2 singlemode (1310nm) — 0.35 dB/km
OS2 singlemode (1550nm) — 0.22 dB/km
Distance (km)
Tx power (dBm)
Rx sensitivity (dBm)
Connectors
0.5 dB each
Splices
0.1 dB each
Safety margin (dB)
Reserve for ageing, dirt and repairs.
Power budget
23.0 dB
Total loss
5.70 dB
Margin
14.30 dB
Link closes
Max distance
50.9 km
Loss budget
Closes
Fiber attenuation
3.50 dB
Connector loss
2.00 dB
Splice loss
0.20 dB
Received power
-5.70 dBm