Spectral & Temporal Studies of Multiply Scattered Ultra-Broadband Light.

Abstract

Mesoscopic light transport through disordered medium (randomly scattering medium) is an ubiquitous phenomenon. Understanding this transport phenomenon is of fundamental importance and helps to answer the unsolved questions about light transport in three-dimensional random systems. Here, we look at the spatial and temporal characteristics of a ultra-broadband and ultra-short coherent light pulse as it travels through a strongly scattering random medium. We launch supercontinuum pulse into the strongly scattering medium to measure the backscattered spectrum (using femtosecond laser) and transmitted spectrum measurements (using ytterbium doped ber). We report out spectral profile in image plane at different concentration and in Fourier plane at different distances at a given concentration to isolate ballistic light from diffused light. The calculation of temporal pro le of the transmitted light is carried out and decay parameters were identified for the system under study.