To use all functions of this page, please activate cookies in your browser.
With an accout for my.chemeurope.com you can always see everything at a glance – and you can configure your own website and individual newsletter.
- My watch list
- My saved searches
- My saved topics
- My newsletter
For an electromagnetic wave, coherence time is the time over which a propagating wave (especially a laser or maser beam) may be considered coherent. In other words, it is the time interval within which its phase is, on average, predictable.
Additional recommended knowledge
Coherence time, τ, is calculated by dividing the coherence length by the phase velocity of light in a medium; approximately given by τ = λ2 / (cΔλ) where λ is the central wavelength of the source, Δλ is the spectral width of the source, and c is the speed of light in vacuum.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Coherence_time". A list of authors is available in Wikipedia.|