Raman-induced Kerr effect spectroscopy optically-heterodyned Raman-induced Kerr effect spectroscopy Spectroscopy where 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. OHRIKE spectroscopy 2009-05-29T11:18:03Z optical heterodyne-detected Raman-induced Kerr-effect spectroscopy CHMO:0001830 https://orcid.org/0000-0001-5985-7429 OHRIKES optically heterodyned Raman induced Kerr effect spectroscopy optically heterodyned Raman-induced Kerr effect spectroscopy OHD-RIKES optically heterodyned Raman-induced Kerr-effect spectroscopy