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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 36, Iss. 30 — Oct. 20, 1997
  • pp: 7799–7801

Polarization dependence of two-photon absorption in an AlGaAs waveguide autocorrelator

M. Mehdi Karkhanehchi, John H. Marsh, and David C. Hutchings  »View Author Affiliations


Applied Optics, Vol. 36, Issue 30, pp. 7799-7801 (1997)
http://dx.doi.org/10.1364/AO.36.007799


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Abstract

We have obtained the complete polarization dependence of the two-photon absorption coefficient β by measuring the orientational dependence and the contrast ratio of the photocurrent in an Al0.2 Ga0.8 As waveguide autocorrelator at an optical frequency far above the half-bandgap. The measured polarization dependence is consistent with theory and previous picosecond nonlinear transmission experiments. The cubic symmetry of the nonlinearity provides a contrast ratio that exceeds 2, which is larger than would be obtained assuming an isotropic medium and Kleinmann symmetry. This device was used to obtain an autocorrelation of a mode-locked Nd:YLF laser.

© 1997 Optical Society of America

History
Original Manuscript: December 17, 1996
Revised Manuscript: June 6, 1997
Published: October 20, 1997

Citation
M. Mehdi Karkhanehchi, John H. Marsh, and David C. Hutchings, "Polarization dependence of two-photon absorption in an AlGaAs waveguide autocorrelator," Appl. Opt. 36, 7799-7801 (1997)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-36-30-7799

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