Dual-broadband pure rotational CARS (RCARS) is nowadays a well-developed gas phase measurement technique.
Nevertheless there are challenges for technical applications due to stray light interference, soot emission or droplets.
Beside this for diffusion flames also a strong, unknown and varying non-resonant background signal is contributing to
the CARS signal. Possible applications of time-resolved pure rotational coherent anti-Stokes Raman spectroscopy for
different applications are demonstrated and its potential of for gas-phase thermometry is investigated. The field of
application covers studies on flame research especially sooting flames as well as its use in technical combustion systems
e.g., for the determination of the gas-phase temperature in the vaporizing spray of a GDI injector. A new advantageous
approach by using picosecond (ps) laser sources as a diagnostic tool is also demonstrated. By time-delaying the ps probe
laser beam problems due to stray light interference, soot emission or droplets can be reduced tremendously of even