optically-heterodyned Raman-induced Kerr effect spectroscopy femtosecond optically-heterodyned Raman-induced Kerr effect spectroscopy fsOHD-RIKES femtosecond optical heterodyne-detected Raman-induced Kerr-effect spectroscopy fs-OHD-RIKES fsOHRIKES https://orcid.org/0000-0001-5985-7429 femtosecond optically heterodyned Raman-induced Kerr-effect spectroscopy femtosecond OHRIKES CHMO:0001839 2009-05-29T01:13:26Z femtosecond optically heterodyned Raman-induced Kerr effect spectroscopy femtosecond optically heterodyned Raman induced Kerr effect spectroscopy fs-OHRIKE spectroscopy fs-OHRIKES femtosecond OHD-RIKES Spectroscopy where femtosecond pulses of two polarized laser beams (pump and probe) with a frequency difference close to a Raman-mode frequency in the sample induce a refractive index change in the sample. By scanning the frequency difference of the two beams and recording simultaneously the polarization change of the probe beam, the Raman spectral structure of the sample can be obtained. The polarizing filters are rotated slightly, giving rise to a heterodyne at the detector, improving the signal-to-noise ratio compared to Raman-induced Kerr effect spectroscopy.