broadband correlation spectroscopy

Frequency bandwidth of light focussed through turbid media
F. van Beijnum, E. G. van Putten, A. Lagendijk, and A. P. Mosk
Opt. Lett. 36, 373 – 375 (2011)

Method for broadband spectroscopy of light transport through opaque scattering media
O. L. Muskens, and A. Lagendijk
Opt. Lett. 34, 395-397 (2009)