Use this electronics calculation for a first-pass component, converter, signal, motor, or sensor estimate when the stated operating conditions and units match the device data.

Dispersion coefficient (ps/(nm·km))

Chromatic dispersion coefficient.

Fiber length (km)

Total length of the fiber run.

Source linewidth (nm)

RMS spectral width of the light source.

Compute the chromatic-dispersion pulse spread of an optical fiber link. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Pulse spread (ns)

Pulse spread caused by chromatic dispersion.

• Fiber loss and dispersion depend on wavelength, fiber type, launch conditions, connectors, splices, bends, temperature, bandwidth, and nonlinear effects. A link budget needs explicit transmitter, receiver, aging, and engineering margins.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check the result against the current datasheet and worst-case operating corners, then verify the circuit or measurement with simulation and bench testing where failure matters.

• Fiber Attenuation dB

  Compute the total attenuation of an optical fiber link from its loss coefficient and length.

• OTDR Distance

  Convert optical time-domain reflectometer round-trip delay to one-way fiber distance using its group refractive index.

• Fiber Attenuation Coefficient

  Average fiber attenuation in decibels per kilometer from launched and received optical power over known length.