Picosecond laser-based fiber-coupled CARS spectroscopy for gas-phase thermometry
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Fiber-based, picosecond coherent anti-Stokes Raman scattering (ps-CARS) spectroscopy employing multimode step-index fiber for gas-phase thermometry in reacting flows is demonstrated. The effects of fiber delivery on the spectral and temporal profiles of the high-peak- power, narrow-band pump and broadband Stokes pulses and, in turn, on the CARS signal are investigated. The proof-of-principle experiment shows significant promise for fiber-based ps-CARS for temperature and species-concentration measurements in harsh chemical environments of practical combustors and gas-turbine-engine test facilities.
author list (cited authors)
Hsu, P. S., Patnaik, A. K., Gord, J. R., Meyer, T. R., Kulatilaka, W. D., & Roy, S.