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 ArticleMore Like This
Patrick Langlois and Erich P. Ippen
Opt. Lett. 24(24) 1868-1870 (1999)
Todd G. Ulmer, Ronson K. Tan, Zhiping Zhou, Stephen E. Ralph, Richard P. Kenan, Carl M. Verber, and Anthony J. SpringThorpe
Opt. Lett. 24(11) 756-758 (1999)
Daniel H. G. Espinosa, Stephen R. Harrigan, Kashif M. Awan, Payman Rasekh, and Ksenia Dolgaleva
J. Opt. Soc. Am. B 38(12) 3765-3774 (2021)