Sergio Chaparro

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In this letter the authors present a comprehensive study of the threshold current and its temperature dependence in GaAsSb-based quantum well edge-emitting lasers for emission at 1.3 m. It is found that at room temperature, the threshold current is dominated by nonradiative recombination accounting for more than 90% of the total threshold current density.(More)
Related Articles Athermal and tunable operations of 850nm vertical cavity surface emitting lasers with thermally actuated T-shape membrane structure Appl. Phys. Lett. 101, 121115 (2012) High-power tunable two-wavelength generation in a two chip co-linear T-cavity vertical external-cavity surfaceemitting laser Appl. Phys. Lett. 101, 121110 (2012) Broad(More)
This paper presents the design using geometric programming of a merged CMOS LNA-Mixer cell, intended for bluetooth application at 2.45GHz. A rigorous noise formulation taking into account on chip inductors non-idealities and parameters from inductor measurement results is provided. Design considerations to achieve geometric programming suitable expressions(More)
This paper presents the accurate synthesis of a narrow-band CMOS Low Noise Amplifier (LNA) using an optimization-based approach. Multi-objective information and the corners of the fabrication process are used in the synthesizer to simultaneously optimize impedance matching, performance parameters and circuit robustness. The synthesis approach combines the(More)
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