Two-time coherence of pulse trains and the integrated degree of temporal coherence
Research output: Contribution to journal › Article › Scientific › peer-review
|Number of pages||7|
|Journal||Journal of the Optical Society of America A: Optics Image Science and Vision|
|Publication status||Published - 2015|
|Publication type||A1 Journal article-refereed|
We examine the temporal coherence properties of trains of nonidentical short optical pulses in the framework of the second-order coherence theory of nonstationary light. Considering Michelson's interferometric measurement of temporal coherence, we demonstrate that time-resolved interferograms reveal the full two-time temporal coherence function of the partially coherent pulse train. We also show that the result given by the time-integrated Michelson interferogram equals the true degree of temporal coherence only when the pulse train is quasistationary, i.e., the coherence time is a small fraction of the pulse duration. True two-time and integrated coherence functions produced by specific models representing perturbed trains of mode-locked pulses and supercontinuum pulse trains produced in nonlinear fibers are illustrated.