A novel Raman probe based on an optically-poled double-core fiber is reported. Efficient in-fiber second-harmonic generation allows for Raman spectroscopy at 532nm when illuminating the fiber with 1064nm laser light. The concentrical cores of the fiber provide independent paths for the delivery of the excitation light and the collection of Raman scattering. Spectra of a sample of dimethyl sulfoxide acquired with this device are presented.
© 2012 Optical Society of AmericaPDF Article