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Two-beam femtosecond coherent anti-Stokes Raman scattering for thermometry on CO2

: Kerstan, M.; Makos, I.; Nolte, S.; Tünnermann, A.; Ackermann, R.


Applied Physics Letters 110 (2017), Nr.2, Art. 021116, 6 S.
ISSN: 0003-6951 (Print)
ISSN: 1077-3118
ISSN: 1931-9401 (online)
Fraunhofer IOF ()

We show that two-beam femtosecond coherent anti-Stokes Raman scattering can be effectively used for thermometry on CO2 for temperatures between ∼100 °C and ∼600 °C at a maximum pressure of 8.5 bar. The temperature measurement is based on probing the vibrationally excited states of CO2, using a ∼7 fs pump/Stokes pulse and a narrowband (∼0.3 nm) probe pulse. The temperatures can be derived from a single spectrum, obviating the need for a delay scan or a chirped probe pulse.