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Numerical investigation of power tunability in two-section QD superluminescent diodes

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Abstract

We present the results of a one-dimensional (1D) numerical model for the simulation of quantum dot (QD) multi-section superluminescent diodes (SLD) using a rate equation approach. A comparison between experimental and simulated P–I characteristics of a single section SLD is provided in order to validate the model parameters. Using these parameters we analyzed more complicated structures with non-uniform injection and waveguide cross section. The purpose has been to investigate how to increase power at the broad-band emission condition (equal power emission from ground state and excited state) and to tune this condition in a wide range of power. We found that applying a non uniform injection in the two sections no improvement in the maximum output power is achieved at the broad bandwidth condition in devices with uniform waveguide. On the contrary, when a tapered section is introduced, the use of two electrodes and non-uniform current injection allows to obtain larger output power and tunability range respect to the case with uniform injection.

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Authors and Affiliations

  1. Dipartimento di Elettronica, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129, Torino, Italy

    Mattia Rossetti, Paolo Bardella & Ivo Montrosset

Authors
  1. Mattia Rossetti
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  2. Paolo Bardella
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  3. Ivo Montrosset
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Corresponding author

Correspondence to Ivo Montrosset.

Additional information

This project was supported by the IST NanoUBSources FP6 European Project no. 017128.

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Rossetti, M., Bardella, P. & Montrosset, I. Numerical investigation of power tunability in two-section QD superluminescent diodes. Opt Quant Electron 40, 1129–1134 (2008). https://doi.org/10.1007/s11082-009-9307-0

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  • DOI: https://doi.org/10.1007/s11082-009-9307-0

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