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IEVref:731-01-18ID:
Language:enStatus: Standard
Term: coherence time
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Definition: the time over which propagating optical radiation may be considered to be coherent radiation

NOTE 1 – The coherence time is equal to coherence length divided by the phase velocity in a medium.

NOTE 2 – The coherence time is given approximately by λ02/c0λ where λ0 is the central wavelength, Δλ is the spectral linewidth and c0 is the speed of light in vacuum.


Publication date:1991-10
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Internal notes:2016-02-08: Editorial changes: "<i>c</i>" replaced by "<i>c</i><sub>0</sub>" and "velocity of light in vacuo" replaced by "speed of light in vacuum".
See correspondence "Questions re part 731" 2015-02 and 2015-03. JGO
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