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
Full Article | PDF ArticleOSA Recommended Articles
D. C. Hutchings, J. S. Aitchison, B. S. Wherrett, G. T. Kennedy, and W. Sibbett
Opt. Lett. 20(9) 991-993 (1995)
W. Andreas Schroeder, D. S. McCallum, D. R. Harken, Mark D. Dvorak, David R. Andersen, Arthur L. Smirl, and Brian S. Wherrett
J. Opt. Soc. Am. B 12(3) 401-415 (1995)
Guangwei Cong, Makoto Okano, Yuriko Maegami, Morifumi Ohno, and Koji Yamada
Opt. Express 26(12) 15090-15100 (2018)