OSNR & Mux/Demux Calculator

Enter optical power, span and channel parameters to instantly compute the theoretical OSNR, passive mux COM power and per-channel power after demux.

Per-channel Power P (dBm)

K Coefficient (dB) 1550 nm band empirical factor, 58 in the workbook

Noise Figure NF (dB)

Span Count N

Total Distance KM (km)

Fiber Loss α (dB/km) Default 0.3; adjust to your fiber

Per-span Loss L—

10log₁₀(N)—

Theoretical OSNR—

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Results are theoretical estimates only and do not replace engineering review; actual link performance is confirmed by the OTSLink engineering team.

OSNR &amp; Mux/Demux Calculator