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Femtosecond coherent anti-stokes Raman scattering measurement of gas temperature simultaneously from H2, N2 and CO2

Ran Y, Nolte S, Tunnermann A, Ackermann R (2019)

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Publication Type: Conference contribution

Publication year: 2019

Publisher: Institute of Electrical and Electronics Engineers Inc.

Conference Proceedings Title: 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019

Event location: Munich, DEU

ISBN: 9781728104690

DOI: 10.1109/CLEOE-EQEC.2019.8872251

Abstract

Femtosecond coherent anti-Stokes Raman scattering (fs-CARS) is an ideal approach for non-invasive temperature measurement under high temperature and high pressure conditions [1], which is essentially important for applications in gasification or combustion [2]. In this study, the important combustion species hydrogen (H2), nitrogen (N2) and carbon dioxide (CO2) are used for temperature determination. Using a ∼ 7 fs ultra-broadband (∼ 650 nm - 1100 nm, 200 kHz) beam from an OPCPA laser as the pump/Stokes beam, and a ∼ 1.5 ps narrowband (∼ 516 nm, 200 kHz) beam as the probe, we show that our two-beam fs-CARS setup enables a wide simultaneously detectable range for multiple molecules, covering Raman shift up to ∼ 4160 cm^-1. Moreover, we present that in a H2/N2/CO2 gas mixture, the temperature can be determined without considering the non-resonant signal simultaneously from a single spectrum of H2/CO2 fs-CARS within ∼ 3 ps probe delay [3], and also from the decay rate of N2 fs-CARS signal in the same measurement. Temperature measurements have been implemented up to 1000 K and at pressures up to 20 bar. This provides high flexibility when targeting temperature determination under different environments. The modelling for fs-CARS gas temperature determination is described in detail in [4].

Involved external institutions

How to cite

APA:

Ran, Y., Nolte, S., Tunnermann, A., & Ackermann, R. (2019). Femtosecond coherent anti-stokes Raman scattering measurement of gas temperature simultaneously from H2, N2 and CO2. In 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019. Munich, DEU: Institute of Electrical and Electronics Engineers Inc..

MLA:

Ran, Yang, et al. "Femtosecond coherent anti-stokes Raman scattering measurement of gas temperature simultaneously from H2, N2 and CO2." Proceedings of the 2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference, CLEO/Europe-EQEC 2019, Munich, DEU Institute of Electrical and Electronics Engineers Inc., 2019.

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