A multi-pass cuvette for measuring Raman spectra of liquids

A multi-path cuvette for measuring Raman spectra of liquids has been proposed, developed and introduced into the practice of spectroscopic studies. It allows to increase the optical path of the laser beam in a cuvette filled with salt melt and thus increase the performance factor of using the available power of the laser beam. It is established that the use of the proposed multi-pass cuvette allows to increase the signal-to-noise ratio more than twice. The maximum signal-to-noise ratio is maintained during the studies of salt system melts at high temperatures, when the cuvette with the test sample is placed in a heating furnace. A heating cell for measuring Raman spectra allows to measure the vibrational spectra of condensed systems in the range of 290-1000 K. It is shown that the advantage of the proposed multi-pass cell is simplicity and accessibility of fabrication.