G. Lenz et al., FEMTOSECOND DYNAMICS OF THE NONLINEAR ANISOTROPY IN POLARIZATION-INSENSITIVE SEMICONDUCTOR OPTICAL AMPLIFIERS, Applied physics letters, 68(21), 1996, pp. 2933-2935
The nonlinear response of polarization insensitive semiconductor optic
al amplifiers shows that anisotropy may be induced as a function of in
tensity. With a hetrodyne pump-probe technique, the nonlinear gain and
index components may be polarization resolved as well as time resolve
d. By extending this measurement technique we measure the dynamic anis
otropy directly. (C) 1996 American Institute of Physics.