An infrared light-emitting diode used in a fibre-optic test set emits centred at nm…
PHYSICS · Subjective · Fermi University Physics · Optics & Photonics · Interference and diffraction · Coherence and statistical optics
Optics and Photonics, Ch Two-beam interference and interferometry
Problem
An infrared light-emitting diode used in a fibre-optic test set emits centred at λ=850 nm with a spectral width Δλ=40 nm. Estimate its coherence length ℓc.