SNR Analysis:

       Signal-to-noise ratio (SNR) is a method to judge the quality of Raman spectrum, which refers to the ratio of the output signal power of the equipment to the noise power output at the same time. The higher the SNR of the device, the less noise it produces. Generally speaking, the higher the SNR, the smaller the noise mixed in the signal, the higher the Raman spectral quality, otherwise the opposite.