23 February 2018 Design and simulation of quantum-dot-based push-pull DFB lasers
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Abstract
We present an analysis of Quantum Dot (QD) based Push-Pull modulated DFB (PP-DFB) laser, showing enhanced small and large signal modulation bandwidth thanks to the interaction between two longitudinal cavity modes. Using an analysis of the cavity modes at threshold, we propose a simple yet effective design technique which allow to select the cavity length and the coupling coefficient to obtain the desired extension of the modulation bandwidth. The design is validated using a Time Domain Travelling Wave (TDTW) model including a proper description of the Quantum Dot material and of the standing wave pattern generated by the cavity field. Our results show that QD PP-DFB can effectively take advantage of the Push-Pull modulation scheme to increase their modulation bandwidth.
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I. Montrosset, P. Bardella, "Design and simulation of quantum-dot-based push-pull DFB lasers", Proc. SPIE 10526, Physics and Simulation of Optoelectronic Devices XXVI, 1052605 (23 February 2018); doi: 10.1117/12.2290711; https://doi.org/10.1117/12.2290711
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