A simplified experimental arrangement, in which the laser beams are counter-propagating, has allowed the acquisition of Raman gain spectra without the aid of optically dispersive devices. The method allows high spectral resolution with the spatial rejection of fluorescence typical of coherent Raman techniques. Access to the low-frequency spectral region has revealed stimulated gain involving mechanical waves of the bulk medium. Quasi-continuous scans of the entire vibrational region have been made using only two laser dyes.
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.
Contact your librarian or system administrator
Login to access OSA Member Subscription