We present a method that allows one to measure the real and imaginary parts of the third-order susceptibility in a wide-field coherent anti-Stokes Raman scattering setup using a quadriwave lateral shearing interferometer. This permits the retrieval of the undistorted Raman spectrum and the removal of a nonresonant signal from the surrounding solvent, which otherwise may overwhelm weak resonances.
© 2013 Optical Society of America
Original Manuscript: October 9, 2012
Revised Manuscript: December 27, 2012
Manuscript Accepted: January 27, 2013
Published: February 25, 2013
Vol. 8, Iss. 4 Virtual Journal for Biomedical Optics
Pascal Berto, Alexander Jesacher, Clemens Roider, Serge Monneret, Hervé Rigneault, and Monika Ritsch-Marte, "Wide-field vibrational phase imaging in an extremely folded box-CARS geometry," Opt. Lett. 38, 709-711 (2013)