Time-resolved two-window measurement of Wigner functions for coherent backscatter from a turbid medium

Frank Reil; John E. Thomas

doi:10.1117/12.469017

31 May 2002 Time-resolved two-window measurement of Wigner functions for coherent backscatter from a turbid medium

Frank Reil, John E. Thomas

Proceedings Volume 4705, Saratov Fall Meeting 2001: Coherent Optics of Ordered and Random Media II; (2002) https://doi.org/10.1117/12.469017
Event: Saratov Fall Meeting 2001, 2001, Saratov, Russian Federation

Abstract

For the first time we are able to observe the time-resolved Wigner function of enhanced backscatter from a random medium using a novel two-window technique. This technique enables us to directly verify the phase-conjugating properties of random media. An incident divergent beam displays a convergent enhanced backscatter cone. We measure the joint position and momentum (x, p) distributions of the light field as a function of propagation time in the medium. The two-window technique allows us to independently control the resolutions for position and momentum, thereby surpassing the uncertainty limit associated with Fourier transform pairs. By using a low-coherence light source in a heterodyne detection scheme, we observe enhanced backscattering resolved by path length in the random medium, providing information about the evolution of optical coherence as a function of penetration depth in the random medium.

Citation Download Citation

Frank Reil and John E. Thomas "Time-resolved two-window measurement of Wigner functions for coherent backscatter from a turbid medium", Proc. SPIE 4705, Saratov Fall Meeting 2001: Coherent Optics of Ordered and Random Media II, (31 May 2002); https://doi.org/10.1117/12.469017

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