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.

Design and simulation of quantum-dot-based push-pull DFB lasers / Montrosset, I.; Bardella, P.. - ELETTRONICO. - 10526:(2018), p. 4. (Intervento presentato al convegno Physics and Simulation of Optoelectronic Devices XXVI 2018 tenutosi a San Francisco (USA) nel 29 January-1 February 2018) [10.1117/12.2290711].

Design and simulation of quantum-dot-based push-pull DFB lasers

Montrosset, I.;Bardella, P.
2018

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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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2707150
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