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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 10, Iss. 10 — Oct. 1, 1993
  • pp: 1890–1893

Photodarkening effect on absorption nonlinearity in CdSxSe1−x-doped glass

P. Malý, E Trojánek, and A. Svoboda  »View Author Affiliations


JOSA B, Vol. 10, Issue 10, pp. 1890-1893 (1993)
http://dx.doi.org/10.1364/JOSAB.10.001890


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Abstract

We study the influence of laser exposure on transient absorption in a commercial Schott color glass filter doped by CdSxSe1−x microcrystals. With laser exposure the magnitude of the transient absorption at wavelengths above the band gap (negative, with the fast decay rate ≥1011 s−1), decreases, whereas that at wavelengths below the band gap (positive, decay time of 500 ps) increases (in the spectral interval 600–850 nm) or does not change (at 900–1060 nm). At wavelengths near the band gap the differential absorbance changes in both magnitude and sign. A broad maximum between 700–800 nm, which increases with photodarkening, has been found in the spectrum of transient absorption. We interpret this maximum as arising from an increase in the number of energy states in the gap. The compatibility of our results with the results published previously is discussed, and a modification of recently proposed models of photodarkening is suggested.

© 1993 Optical Society of America

History
Original Manuscript: July 27, 1992
Revised Manuscript: March 19, 1993
Published: October 1, 1993

Citation
P. Malý, E Trojánek, and A. Svoboda, "Photodarkening effect on absorption nonlinearity in CdSxSe1−x-doped glass," J. Opt. Soc. Am. B 10, 1890-1893 (1993)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-10-10-1890


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