Hollow and dielectric waveguides for infrared spectroscopic applications

Steven J. Saggese; James A. Harrington; George H. Sigel Jr.

doi:10.1117/12.45129

1 April 1991 Hollow and dielectric waveguides for infrared spectroscopic applications

Steven J. Saggese, James A. Harrington, George H. Sigel Jr.

Proceedings Volume 1437, Applied Spectroscopy in Material Science; (1991) https://doi.org/10.1117/12.45129
Event: Optics, Electro-Optics, and Laser Applications in Science and Engineering, 1991, Los Angeles, CA, United States

Abstract

Solid and hollow waveguides have been employed for spectroscopic and radiometric measurements. Hollow sapphire guides, with a transmission window from 10 - 17 micrometers , are used to detect 20% CO2 in N2. Hollow silica waveguides, with a transmission window from 7 -9 micrometers , are utilized for detecting 100% methane and also for low temperature radiometric measurements from 30 degree(s)C to 150 degree(s)C. The spectroscopic analysis was accomplished by passing the gas down the interior of the hollow guide for an extended pathlength absorption. The hollow silica guide measured the low temperature region with a minimum resolvable temperature difference of less than 1 degree(s)C.

Citation Download Citation

Steven J. Saggese, James A. Harrington, and George H. Sigel Jr. "Hollow and dielectric waveguides for infrared spectroscopic applications", Proc. SPIE 1437, Applied Spectroscopy in Material Science, (1 April 1991); https://doi.org/10.1117/12.45129

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