Direct picosecond measurements of refractive and absorptive nonlineariteis in In0.530Al0.141Ga0.329As/In0.530Ga0.47As multi-quantum-wells in the range 1480 nm to 1550 nm are reported. Large, low-threshold nonlinear index changes (∆nmax=−0.14) with figures of merit larger than 1 are measured.

© 2003 Optical Society of America

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