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Applied Optics

Applied Optics


  • Vol. 38, Iss. 12 — Apr. 20, 1999
  • pp: 2625–2629

External photoacoustic detection of a trace vapor inside a multimode laser

Torsten J. Latz, Gabriele Weirauch, Valery M. Baev, and Peter E. Toschek  »View Author Affiliations

Applied Optics, Vol. 38, Issue 12, pp. 2625-2629 (1999)

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We combine highly sensitive intracavity absorption spectroscopy in a multimode laser with external photoacoustic detection, providing high detectivity. Photoacoustic measurements of the intracavity iodine concentration in a Rhodamine 6G laser are compared with simultaneous spectral recordings. They demonstrate slightly improved overall sensitivity and a greatly enhanced dynamic range of 5 orders of magnitude that may be shifted along the absolute scale of absorber density.

© 1999 Optical Society of America

OCIS Codes
(300.1030) Spectroscopy : Absorption
(300.6360) Spectroscopy : Spectroscopy, laser
(300.6430) Spectroscopy : Spectroscopy, photothermal

Original Manuscript: September 22, 1998
Revised Manuscript: December 15, 1998
Published: April 20, 1999

Torsten J. Latz, Gabriele Weirauch, Valery M. Baev, and Peter E. Toschek, "External photoacoustic detection of a trace vapor inside a multimode laser," Appl. Opt. 38, 2625-2629 (1999)

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