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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 34, Iss. 23 — Dec. 1, 2009
  • pp: 3716–3718

Applying light-emitting diodes with narrowband emission features in differential spectroscopy

Holger Sihler, Christoph Kern, Denis Pöhler, and Ulrich Platt  »View Author Affiliations

Optics Letters, Vol. 34, Issue 23, pp. 3716-3718 (2009)

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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

Original Manuscript: August 5, 2009
Revised Manuscript: October 23, 2009
Manuscript Accepted: October 25, 2009
Published: November 25, 2009

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)

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