Thermo-Optic Shift (dn/dT) calculator

Index change with temperature for the operating environment.

Category: Materials

Formula: Δn = (dn/dT) · ΔT

Inputs

InputParameterUnitDefault
dn/dT (1/K)dndt0.000011
ΔTdTK20
n at T0n01.5168

Result with the default inputs

  • Δn: 2.200000e-4
  • n(T): 1.51702

Open it with your own values: put each input in the address as a parameter, for example /calculators/thermo-optic-shift-dn-dt?dndt=0.000011. A unit other than the listed one goes in <parameter>_unit.

Read more: Wikipedia: Thermo-optic effect

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