The difference of Raman spectra between lightly and heavily Na-doped traps-polyacetylene (trans-PA) was observed with the 1320 nm laser line, and these were discussed on the basis of the Raman spectra of the negatively charged anions Ph(CH)(n)Ph-[DPn-, n = 3, 5, 7, 9, and 13] and the radical-anion species Ph(CH)(n)Ph.- [DPn.-, n = 4, 6, 8, and 10] and 19,19',20,20'-tetranor-beta,beta'-carotene [TNBC.-, n = 22] of the model compounds, which correspond respectively to negatively charged soliton and negative polarons in traps-PA. The observed wavenumbers of the nu(1) and nu(4) bands (C=C and C-C stretches) of lightly doped traps-PA are lower than those of the corresponding bands of pristine traps-PA, whereas the contrary is the case for heavily doped traps-PA. Raman spectra of the negatively charged soliton models (DPn-) and the negative polaron models (DPn.- and TNBC.-) were very similar to their spectrum patterns as a whole, but their wavenumbers and relative intensities are mutually different to some extent. In particular, the Raman wavenumbers of heavily doped traps-PA are very similar with those of the polaron models. The dispersion of the C=C stretching band (nu(1)) in doped PA with the various wavelengths of excitation laser line were explained as the presence of charged domains having various lengths of electron localization.