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Conference on Lasers and Electro-Optics

Multi Wavelength Characterization of Ultra Fast Carrier Dynamics in InAs/InP Quantum Dash Optical Amplifiers

Amir Capua, G. Eisenstein, Johann Peter Reithmaier

Published Jan 1, 2011• 0 citations
Publisher

Abstract

Ultrafast cross saturation dynamics of inhomogeneously broadened InAs/InP quantum dash optical amplifiers were characterized by multi-wavelength pump probe spectroscopy. Carrier relaxation processes are identified and quantified for the first time.
DOI
10.1364/cleo_si.2011.cfo4

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We describe a unique phenomenon occurring in InAs/InP quantum dash amplifiers: a nearly instantaneous gain response taking place across the entire inhomogeneously broadened gain spectrum. The phenomenon is induced by a 100–150 fs pulse and is observable using multiwavelength pump probe measurements. Large bias levels and an intense pump pulse are imperative for enacting the ultrafast mechanism which is due to a combination of the gain inhomogeneity, nonlinear two photon absorption and the quantum wirelike density of state function.