title: Complex characterization of short-pulse propagation through InAs/InP quantum-dash optical amplifiers: from the quasi-linear to the two-photon-dominated regime.
abstract: We describe direct measurements at a high temporal resolution of the changes experienced by the phase and amplitude of an ultra-short pulse upon propagation through an inhomogenously broadened semiconductor nanostructured optical gain medium. Using a cross frequency-resolved optical gating technique, we analyze 150 fs-wide pulses propagating along an InP based quantum dash optical amplifier in both the quasi-linear and saturated regimes. For very large electrical and optical excitations, a second, trailing peak is generated and enhanced by a unique two-photon-induced amplification process.
authors.affiliation: Department of Electrical Engineering, Technion,Haifa,32000, Israel. acapua@tx.technion.ac.il
authors.forename: Amir
authors.initials: A
authors.lastname: Capua
authors.forename: Abigael
authors.initials: A
authors.lastname: Saal
authors.forename: Ouri
authors.initials: O
authors.lastname: Karni
authors.forename: Gadi
authors.initials: G
authors.lastname: Eisenstein
authors.forename: Johann Peter
authors.initials: JP
authors.lastname: Reithmaier
authors.forename: Kresten
authors.initials: K
authors.lastname: Yvind
mesh_terms: D000669:Amplifiers, Electronic; D001152:Arsenicals / Q000737:chemistry*; D003198:Computer Simulation; D007204:Indium / Q000737:chemistry*; D008027:Light; D008956:Models, Chemical; D010720:Phosphines / Q000737:chemistry*; D017785:Photons; D045663:Quantum Dots; D012542:Scattering, Radiation
chemical_list: D001152:Arsenicals; D010720:Phosphines; D007204:Indium; C076773:indium arsenide; C090882:indium phosphide