Two-photon photodetector in a multiquantum well GaAs laser structure at 1.55 microm.
We report two-photon photocurrent in a GaAs/AlGaAs multiple quantum well laser at 1.55 microm. Using 1ps pulses, a purely quadratic photocurrent is observed. We measure the device efficiency, sensitivity, as well as the two-photon absorption coefficient. The results show that the device has potential for signal processing, autocorrelation and possibly two-photon source applications at sub-Watt power levels.
Duchesne
D
D
INRS-EMT, Université du Québec, Varennes, Quebec, Canada.
Razzari
L
L
Halloran
L
L
Morandotti
R
R
SpringThorpe
A J
AJ
Christodoulides
D N
DN
Moss
D J
DJ