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Nonclassicality is studied through a quasidistribution of phases for theRaman process under both weak and strong pump conditions. In the former case,the solution is applicable to both resonant and off-resonant Raman processes,while strong classical pump is assumed at resonance. Under weak pump conditions(i.e., in a complete quantum treatment), the phase difference of phasesdescribed by single nonclassical modes is required to be filtered to describe aregular distribution function, which is not the case with strong pump. CompoundStokes-phonon mode shows nonclassical features of phases in both weak andstrong pumping, which effect is similar to that for compound pump-phonon(Stokes-anti-Stokes) mode with weak (strong) pump. While anti-Stokes-phononmode is observed to be classical and coherence conserving in strong pump case,pump-Stokes mode shows similar behavior in a special case in quantum treatment.

Quasidistribution of phases in Raman process with weak and strong pumps