Cavity ring down spectrocopy with a free-electron laser

Engeln, R.; van den Berg, E.; Meijer, Gerard; Lin, L.; Knippels, G.M.H.; van der Meer, A.F.G.

doi:10.1016/S0009-2614(97)00292-3

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Cavity ring down spectrocopy with a free-electron laser

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Engeln, R., van den Berg, E., Meijer, G., Lin, L., Knippels, G., & van der Meer, A. (1997). Cavity ring down spectrocopy with a free-electron laser. Chemical Physics Letters, 269(3-4), 293-297. doi:10.1016/S0009-2614(97)00292-3.

Cite as: https://hdl.handle.net/21.11116/0000-000B-6656-2

Abstract

A cavity ring down (CRD) absorption experiment is performed with a free-electron laser (FEL) operating in the 10–11 μm region. A short infrared pulse of approximately 20 ns, sliced from the much longer FEL pulse, is used to measure CRD spectra of ethylene in two different ways. First, “ordinary” CRD spectra with a resolution determined by the bandwidth of the FEL (≈ 5 cm⁻¹) are recorded. Second, Fourier transform (FT) CRD spectra with a resolution that is in principle determined by the FT-spectrometer are obtained by analyzing the light exiting the ring down cavity with a FT-spectrometer while the FEL is operated in broadband mode.