1.55µm InP-based electrically-pumped VECSELs: comparison of buried and implanted tunnel junctions as current confinement schemes for the realization of large diameter devices - CentraleSupélec Accéder directement au contenu
Communication Dans Un Congrès Année : 2007

1.55µm InP-based electrically-pumped VECSELs: comparison of buried and implanted tunnel junctions as current confinement schemes for the realization of large diameter devices

Résumé

We report on the design, fabrication, and characterization of InP-based 1.55 µm wavelength large diameter (50 µm) electrically-pumped vertical external cavity surface emitting lasers (EP-VECSELs). The hybrid device consists of a half vertical cavity surface emitting laser (1/2-VCSEL) structure assembled with a concave dielectric external mirror. The 1/2- VCSEL is monolithically grown on InP substrate and includes a semiconductor Bragg mirror and a tunnel junction for electrical injection. Buried (BTJ) and ion implanted (ITJ) tunnel junction electrical confinement schemes are compared in terms of their thermal and electrical characteristics. Lower thermal resistance values are measured for BJT, but reduced current crowding effects and uniform current injection are evidenced for ITJ. Using the ITJ technique, we demonstrate Room-Temperature (RT) continuous-wave (CW) single transverse mode laser operation from 50-µm diameter EP-VECSEL devices. We show that the experimental laser optical output versus injected current (L-I) curves are well-reproduced by a simple analytical thermal model, consistent with the thermal resistance measurements performed on the 1/2-VCSEL structure. Our results indicate that thermal heating is the main mechanism limiting the maximum CW output power of 50-µm diameter VECSELs, rather than current injection inhomogeneity.
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Dates et versions

hal-00218305 , version 1 (26-01-2008)

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Adel Bousseksou, Sophie Bouchoule, Moustafa El Kurdi, Isabelle Sagnes, Gilles Beaudoin, et al.. 1.55µm InP-based electrically-pumped VECSELs: comparison of buried and implanted tunnel junctions as current confinement schemes for the realization of large diameter devices. SPIE - Vertical-Cavity Surface-Emitting Lasers XI, Jan 2007, San Jose, CA, United States. pp.64840G-1-7, ⟨10.1117/12.700654⟩. ⟨hal-00218305⟩
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