Coherence Length & Time calculator
Longitudinal coherence from spectral bandwidth (Gaussian).
Category: Spectroscopy
Formula: Lc = (2 ln2 / π) · λ²/Δλ · τc = Lc/c
Inputs
| Input | Parameter | Unit | Default |
|---|---|---|---|
| Center λ | lam | nm | 800 |
| Δλ FWHM | dlam | nm | 30 |
Result with the default inputs
- Coherence length: 9.4138 µm
- Coherence time: 31.401 fs
Open it with your own values: put each input in the address as a parameter, for example /calculators/coherence-length-time?lam=800. A unit other than the listed one goes in <parameter>_unit.
Read more: Wikipedia: Coherence length