title: Two-photon photodetector in a multiquantum well GaAs laser structure at 1.55 microm.
abstract: 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.
authors.affiliation: INRS-EMT, Université du Québec, Varennes, Quebec, Canada.
authors.forename: D
authors.initials: D
authors.lastname: Duchesne
authors.forename: L
authors.initials: L
authors.lastname: Razzari
authors.forename: L
authors.initials: L
authors.lastname: Halloran
authors.forename: R
authors.initials: R
authors.lastname: Morandotti
authors.forename: A J
authors.initials: AJ
authors.lastname: SpringThorpe
authors.forename: D N
authors.initials: DN
authors.lastname: Christodoulides
authors.forename: D J
authors.initials: DJ
authors.lastname: Moss