Observatorio de I+D+i UPM

Memorias de investigación
Communications at congresses:
Electrical characterization of long wavelength VCSELs with tunnel junction
Research Areas
  • Electronic technology and of the communications
We present results on the electrical characterization of commercial fiber pigtailed 1. 55 ¿m 2.5 Gb/s VCSEL based on InAlGaAs active region, tunnel junction (TJ), air-gap aperture and InAlGaAs/InAlAs mirrors. The current-voltage (I-V) characteristics were measured and the results were fitted to the analytical expressions of an equivalent circuit considering the TJ in series with the active junction and a series resistance. Carrier capture/escape effects were considered in order to account for the reduced value of the drop in the measured differential resistance at threshold. The electrical parameters of both junctions were determined, showing that the TJ was responsible for most of the voltage drop at threshold. High frequency electrical impedance measurements were used to determine internal parameters as well as the role of external parasitics. The results were analyzed using a small signal equivalent circuit which includes the TJ, carrier capture/escape effects, the cavity parasitics, and the electrical access. A good agreement between the experimental and the equivalent circuit impedances at different bias was obtained by considering the differential resistances of the active and tunnel junctions extracted from the I-V characteristics, yielding reasonable values of the dynamic time constants and of the recombination coefficients.
SPIE Photonics West 2011
San Francisco, California, EEUU
Start Date
End Date
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Proceedings of SPIE vol. 7952. Vertical-Cavity Surface-Emitting Lasers XV
  • Autor: Antonio Consoli Barone (UPM)
  • Autor: Julia Arias Rodriguez (Univ. Miguel Hernández (Spain))
  • Autor: Jose Manuel Garcia Tijero (UPM)
  • Autor: Francisco Jose Lopez Hernandez (UPM)
  • Autor: Ignacio Esquivias Moscardo (UPM)
Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Ingeniería Óptica
  • Grupo de Investigación: Grupo de Fotónica Aplicada
  • Centro o Instituto I+D+i: Centro de Domótica Integral, CEDINT
  • Centro o Instituto I+D+i: Centro de Materiales y Dispositivos Avanzados para Tecnologías de Información y Comunicaciones
  • Departamento: Tecnología Fotónica y Bioingeniería
S2i 2020 Observatorio de investigación @ UPM con la colaboración del Consejo Social UPM
Cofinanciación del MINECO en el marco del Programa INNCIDE 2011 (OTR-2011-0236)
Cofinanciación del MINECO en el marco del Programa INNPACTO (IPT-020000-2010-22)