To achieve high-spectral-resolution multiplex coherent anti-Stokes Raman scattering (CARS), one typically uses a narrowband pump pulse and a broadband Stokes pulse. This is to ensure a correspondence between anti-Stokes and vibrational frequencies. We obtain high-resolution CARS spectra of isopropanol, using a broadband chirped pump pulse and a broadband Stokes pulse, by detecting the anti-Stokes pulse with spectral interferometry. With the temporally resolved anti-Stokes signal, we can remove the chirp of the anti-Stokes pulse and restore high spectral resolution while also rejecting nonresonant scattering.
© 2006 Optical Society of America
Original Manuscript: January 9, 2006
Revised Manuscript: February 17, 2006
Manuscript Accepted: February 22, 2006
Gareth W. Jones, Daniel L. Marks, Claudio Vinegoni, and Stephen A. Boppart, "High-spectral-resolution coherent anti-Stokes Raman scattering with interferometrically detected broadband chirped pulses," Opt. Lett. 31, 1543-1545 (2006)