Coherent Raman spectroscopy through one-dimensional random scattering medium

Abstract

We investigate the possibility of implementing coherent anti-Stokes Raman spectroscopy (CARS) with a single laser beam passed through a one-dimensional scattering object. The effect of the random scattering is emulated by shaping the laser pulses with a spectral mask corresponding to the transmission spectrum of a random layered medium. Raman resonances are retrieved through correlation analysis of the CARS spectrum. We study the effect of the scattering parameters on the resolution of the method, and show that improvement of the spectroscopic sensitivity can be achieved by compensating the phase distortions introduced by the scatterer.

Keywords:

• coherent nonlinear spectroscopy
• coherent anti-Stokes Raman scattering
• random media

Acknowledgements

The authors are grateful to S.O. Konorov and E.A. Shapiro for stimulating discussions. This work has been supported by the CFI, BCKDF and NSERC.