Pulse spreading: modal vs. chromatic dispersion
Regime:
Modal (MMF, OM4)
Chromatic (SMF, 1550 nm)
Length
40
km
Laser linewidth
0.10
nm
DWDM spectrum visualizer (ITU-T G.694.1 grid)
Band:
C-band (1530–1565 nm)
Extended C (1525–1568 nm)
C+L bands (1530–1625 nm)
Spacing:
100 GHz (≈0.8 nm)
50 GHz (≈0.4 nm)
Per-channel rate:
100 Gb/s
400 Gb/s
800 Gb/s
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Fibre:
SMF @ 1550 nm (0.20 dB/km)
SMF @ 1310 nm (0.35 dB/km)
OM4 MMF @ 850 nm (3.0 dB/km)
Length
40
km
Launch power
0
dBm
Receiver sensitivity
-28
dBm