Studies of HF(v,J) spatial profiles with a hyperspectral imager

W. Terry Rawlins; Steven J. Davis; David B. Oakes; Daniel X. Hammer; Gami Maislin

doi:10.1117/12.537754

11 May 2004 Studies of HF(v,J) spatial profiles with a hyperspectral imager

W. Terry Rawlins, Steven J. Davis, David B. Oakes, Daniel X. Hammer, Gami Maislin

Proceedings Volume 5334, Gas and Chemical Lasers, and Applications III; (2004) https://doi.org/10.1117/12.537754
Event: Lasers and Applications in Science and Engineering, 2004, San Jose, Ca, United States

Abstract

This paper presents results from investigations of mixing flowfields and optical gain profiles in HF chemical laser systems by infrared hyperspectral imaging. A chemiluminescent F + H₂ reacting flowfield, produced in a high-fluence microwave-driven reactor, was imaged at a series of wavelengths, 2.6 to 2.9 μm, by a low-order, spectrally scanning Fabry-Perot interferometer mated to an infrared camera. The resulting hyperspectral data cubes define the spectral and spatial distributions of the emission. High-resolution images were processed to determine spatial distributions of the excited state concentrations of the product HF(v,J), as well as spatial distributions of small-signal gain on specific laser transitions. Additional high-resolution Fourier transform spectroscopy and spectral fitting analysis determined detailed excited state distributions in the reacting flowfield. The measurements confirm that our reactor generates inverted populations of HF(v,J).

Citation Download Citation

W. Terry Rawlins, Steven J. Davis, David B. Oakes, Daniel X. Hammer, and Gami Maislin "Studies of HF(v,J) spatial profiles with a hyperspectral imager", Proc. SPIE 5334, Gas and Chemical Lasers, and Applications III, (11 May 2004); https://doi.org/10.1117/12.537754

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