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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 37, Iss. 21 — Jul. 20, 1998
  • pp: 4991–4997

Water-core waveguide for pollution measurements in the deep ultraviolet

Peter Dress, Mathias Belz, Karl F. Klein, Kenneth T. V. Grattan, and Hilmar Franke  »View Author Affiliations


Applied Optics, Vol. 37, Issue 21, pp. 4991-4997 (1998)
http://dx.doi.org/10.1364/AO.37.004991


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Abstract

A fiber optic system for water analysis with high transparency in the deep-UV region (λ ≥ 190 nm) is presented. The system consists of special UV-improved silica fibers and a liquid-core waveguide (LCW) as an optical cell. The apertures of both light guides, the silica fiber and the LCW, are matched. The optical losses of the device are investigated experimentally and compared with theory, especially with a standard free-space geometry. The performance of the system with respect to UV absorption spectroscopy is demonstrated for nitrate and chlorine pollution in pure water. For a 203-mm-long LCW the detection limits have been determined to be as low as 22 μg/L for nitrate and 26 μg/L for chlorine.

© 1998 Optical Society of America

OCIS Codes
(060.2290) Fiber optics and optical communications : Fiber materials
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(230.7370) Optical devices : Waveguides
(280.0280) Remote sensing and sensors : Remote sensing and sensors
(300.6540) Spectroscopy : Spectroscopy, ultraviolet

History
Original Manuscript: December 9, 1997
Revised Manuscript: March 18, 1998
Published: July 20, 1998

Citation
Peter Dress, Mathias Belz, Karl F. Klein, Kenneth T. V. Grattan, and Hilmar Franke, "Water-core waveguide for pollution measurements in the deep ultraviolet," Appl. Opt. 37, 4991-4997 (1998)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-37-21-4991

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