Peak detection is an important step in the chemical identification by Raman spectroscopy. At present, most peak detection methods have finite identification ability on overlapping peaks, especially for the spectrum measured by the portable spectrometer with low resolution. In this paper, an improved method is proposed that using continuous wavelet transform(CWT) peak detection method based on a new wavelet on the deconvolved Raman spectrum. The new wavelet has smaller linewidth and is more similar with the intrinsic line profile of Raman spectroscopy, Lorentz line profile. So it has advantages on overlapping peaks detection. The proposed method was evaluated by Raman spectrum of solid amino acid mixtures. The results show that it is better at detecting overlapping peaks than the other two wavelets.
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