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sci.fiber-optic-dispersion Calculator
Calculates pulse broadening in optical fibre from chromatic dispersion coefficient D, fibre length L, and source spectral width: σ = D × L × Δλ. Standard SMF-28 fibre has D = 17 ps/(nm·km) at 1,550 nm — a 100 ps/nm source over 100 km broadens pulses by 1.7 ns.
Inputs
Fiber Length Km
Linear measurement. Ensure consistent units: 1 m = 1,000 mm = 3.281 ft.
Dispersion Ps Nm Km
Reference formula or conversion factor shown for context.
Source Linewidth Nm
Horizontal extent perpendicular to the length.
Bit Rate Gbps
Amount per unit of time or per unit quantity. Check the denominator before interpreting.
Results
pulse broadening (ps)
Sample size or count used in the calculation.
bit period (ps)
Reference formula or conversion factor shown for context.
dispersion penalty ratio
The proportional relationship between two quantities.
BW-distance product (GHz·km)
The computed distance or separation.
σ_pulse = D·L·Δλ
Reference formula or conversion factor shown for context.