High order coherent Raman radiation caused by two different mechanisms in the stimulated Raman scattering experiments have been studied. One is the cascade stimulated scattering process, the other is Raman-resonance enhanced four-wave mixing which is characterized by phase matching condition and causes a hollow ring distributtion in the near-field. Experimental results judgement . using calcite sample have shown that these two physical processes can appear separately or simultaneously depending on the experimental conditions.