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Two-photon absorption based photodetection at 1550 nm is shown using a GaAs multiple-quantum well waveguide laser structure. A large efficiency is determined and we demonstrate its application for autocorrelation of 100 fs pulses with sub-watt peak powers.
We report the first demonstration of two-photon photocurrent in a GaAs/AlGaAs multiple quantum well laser at 1.55 mum. We measure the device efficiency, sensitivity, as well as the two-photon absorption coefficient. The results show that the device has a strong potential for signal processing, autocorrelation and possibly two-photon source applications at sub-Watt power levels.
We report the first two-photon detector in a GaAs / AlGaAs multiple quantum well laser structure at 1550 nm. The ultrafast photogenerated carrier sweep-out rates and control of the nonlinear FOM are promising for signal processing applications.
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