We report on a new experimental method for enhanced backscattering spectroscopy (EBS) of strongly scattering media over a bandwidth from 530-1000 nm. The instrument consists of a supercontinuum light source and an angle-dependent detection system using a fiber-coupled grating spectrometer. By a combination of two setups, the backscattered intensity is obtained over a large angular range and using circularly polarized light. We present broadband EBS of a TiO(2) powder and of a strongly scattering porous GaP layer. In combination with theoretical model fits, the EBS system yields the optical transport mean free path over the available spectral window.
[NB while this paper is not by COPS, one author joined soon after, and the topic is close to our interests.]

https://www.osapublishing.org/oe/fulltext.cfm?uri=oe-16-2-1222&id=148991

O. L. Muskens and A. Lagendijk

2008

01/2008

Opt. Express

16

1222-1231

10.1364/OE.16.001222

enhanced backscattering spectroscopy, porous materials, scattering