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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 2, Iss. 5 — May. 1, 1985
  • pp: 776–780

Color-center laser spectroscopy of transient species produced by excimer-laser flash photolysis

Horst Adams, Jeffrey L. Hall, L. A. Russell, J. V. V. Kasper, F. K. Tittel, and R. F. Curl, Jr.  »View Author Affiliations


JOSA B, Vol. 2, Issue 5, pp. 776-780 (1985)
http://dx.doi.org/10.1364/JOSAB.2.000776


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Abstract

Kinetic spectroscopy based on excimer-laser flash photolysis and color-center-laser (CCL) infrared probing is explored. In simple absorption, the achievable signal-to-noise ratio (S/N) is not satisfactory even though the signal itself (corresponding to >1% absorption) is fairly large. This is due to amplitude fluctuations of the CCL. By using a double-beam detection scheme to balance out these amplitude fluctuations the sensitivity can be improved to the extent that a 1% absorption gives a S/N ∼ 100. In certain situations transient decreases in absorption of the precursor and transient increases in absorption due to final product formation can produce severe interfering signals even in simple systems. This problem is overcome without a major loss in sensitivity by a recently developed 45° magnetic rotation scheme. These points are illustrated with spectra of Br, OH, and NH2.

© 1985 Optical Society of America

History
Original Manuscript: August 31, 1984
Manuscript Accepted: December 6, 1984
Published: May 1, 1985

Citation
Horst Adams, Jeffrey L. Hall, L. A. Russell, J. V. V. Kasper, F. K. Tittel, and R. F. Curl, "Color-center laser spectroscopy of transient species produced by excimer-laser flash photolysis," J. Opt. Soc. Am. B 2, 776-780 (1985)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-2-5-776

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