Applying light-emitting diodes with narrowband emission features in differential spectroscopy
Optics Letters, Vol. 34, Issue 23, pp. 3716-3718 (2009)
http://dx.doi.org/10.1364/OL.34.003716
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Abstract
LEDs are a promising new type of light source for differential optical absorption spectroscopy (DOAS). Varying differential structures in the emission spectrum of LEDs, however, display a potentially severe problem. We show that the structures, which originate from a Fabry–Pérot etalon, may be removed by tilting the emitter, which at the same time increases the radiant flux coupled into the subsequent optical system. The results of long-path DOAS measurements, where we apply our method on a blue LED for the suppression of periodic structures, are also presented.
© 2009 Optical Society of America
OCIS Codes
(010.1280) Atmospheric and oceanic optics : Atmospheric composition
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(230.3670) Optical devices : Light-emitting diodes
(280.1120) Remote sensing and sensors : Air pollution monitoring
(300.1030) Spectroscopy : Absorption
ToC Category:
Optical Devices
History
Original Manuscript: August 5, 2009
Revised Manuscript: October 23, 2009
Manuscript Accepted: October 25, 2009
Published: November 25, 2009
Citation
Holger Sihler, Christoph Kern, Denis Pöhler, and Ulrich Platt, "Applying light-emitting diodes with narrowband emission features in differential spectroscopy," Opt. Lett. 34, 3716-3718 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-23-3716
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