Nondegenerate four-wave mixing in quantum dot distributed feedback lasers

We present wavelength conversion using nondegenerate four-wave mixing in loss-coupled distributed feedback lasers based on InAs quantum dots (QDs) grown on a GaAs substrate. The conversion efficiency is measured to be -15 to -30 dB for a signal-pump detuning range from 0.33 to 8 nm. The third-order optical susceptibility (/spl chi//sup (3)/) normalized to the optical linear gain in the QDs is estimated to be 3/spl times/10/sup -20/ m/sup 3//V/sup 2/ to 9/spl times/10/sup -20/ m/sup 3//V/sup 2/ for the signal-pump detuning range.

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