We have used telluride glass fibers fabricated in house to measure the evanescent-absorption spectra of water, methanol, ethanol, isopropanol, acetone, ethanoic acid, hexane, and chloroform. Furthermore, detection limits of less than 2 vol. % solute were obtained for mixtures of water and methanol, ethanol, isopropanol, acetone, and ethanoic acid. Techniques to reduce the detection limits are discussed.
© 1994 Optical Society of America
Original Manuscript: October 15, 1993
Revised Manuscript: March 4, 1994
Published: September 20, 1994
J. S. Sanghera, F. H. Kung, P. C. Pureza, V. Q. Nguyen, R. E. Miklos, and I. D. Aggarwal, "Infrared evanescent-absorption spectroscopy with chalcogenide glass fibers," Appl. Opt. 33, 6315-6322 (1994)