A multipass optical scheme for broadband measurements in Raman-scattering spectra

An optical scheme that provides multiple transmission of a probing laser beam through an object under study is considered. A Raman-scattering (RS) spectrometer is described in which this scheme is used to increase a signal in local simultaneous measurements of the temperature and the composition of gaseous mixtures. Broadband RS spectra in gaseous jets in the presence and absence of combustion were obtained as a result of broadband recording. The results of their processing using original software tools are demonstrated.