MULTIPLE-SCATTERING SUPPRESSION - CROSS-CORRELATION WITH TILTED SINGLE-MODE FIBERS

Multiple light scattering can be suppressed by slightly tilting two si ngle-mode fibers viewing the same sample volume. The cross-correlation function of the two signals shows more or less contributions from sin gle scattering, depending on the tilt angle. We show experimental resu lts for polystyrene spheres at a scattering angle of 90 degrees. The m easured size, intercept, and second cumulant for different tilt angles demonstrate the practicality of this technique. Both polarization com ponents show multiple-scattering contributions, but only the parallel component contains single scattering. (C) 1997 Optical Society of Amer ica.