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Mid-IR Spectroscopy in a Hollow Fiber Gas CellIn collaboration with scientists at the Pacific Northwest National Laboratory (PNNL), OptoKnowledge is utilizing proprietary hollow fiber technology to develop new, innovative sensors for isotope and trace-gas analysis. The hollow fiber acts as a gas cell, as well as a light-pipe that guides a tunable Mid-IR laser beam to a detector. As the laser wavelength is swept through molecular absorption features, accurate concentrations of various constituents can be determined. This concept, referred to as a capillary absorption spectrometer (CAS), enables high precision measurements within the ultra-small volume (~ 0.1 ml) of the hollow core fiber optic. ![]() Relevant Publications: J.F. Kelly, R.L. Sams, T.A. Blake, and J.M. Kriesel, "Further developments of capillary absorption spectrometers using small hollow-waveguide fibers", SPIE Proceedings Vol. 8993, DOI: 10.1117/12.2042734 (2014). J.F. Kelly, R.L. Sams, T.A. Blake, M. Newburn, J. Moran, M.L. Alexander, and H. Kreuzer, “A capillary absorption spectrometer for stable carbon isotope (13C/12C) analysis in very small samples,” Rev. Sci. Inst. 83, (2012). |