A second-order interferometric correlation technique is used to provide new experimental data on the residual coherence of diffused femtosecond laser pulses in turbid media. A coherence factor is defined and time-resolved results are compared to ones from other experimental approaches, leading to a refined definition of the coherence of snake photons, which are present in large numbers in true biological media. Coherence and time-broadening measurements are reported for samples of diluted milk, with from 0.5 to 3.5 mean number of diffusions.
Parys, B., Allard, J.-F., Desmullier, F., Houde, D., & Cornet, A. (2004). Coherence analysis of diffused femtosecond laser pulses. Journal of Optics A: Pure and Applied Optics, 6(2), L23-L27. https://doi.org/10.1088/1464-4258/6/2/L01 (Original work published 2004)