Abstract

The cascaded stimulated Raman scattering (SRS) of 30% H₂O₂ aqueous solutions was investigated using a pulsed Nd: YAG laser with a wavelength of 532 nm. The transfer of excess electrons between H₂O₂ and H₂O molecules enhanced the SRS. Together, the decomposition of H₂O₂ and the intense SRS Stokes led to the generation of the crossing-pump effect of H₂O₂ aqueous solutions and the appearance of a new peak at 4229 cm^-1 that is excited by Stokes as the pump source. Crossing-pump not only reduced the threshold but also generated the broadband-coherent Raman comb, defined as a coherent radiation wavelength ranging from 434 to 831 nm (i.e., a Raman shift ranging from –4225 to 6756 cm^-1). The anti-Stokes SRS was attributed to the four-wave mixing (FWM) process.

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