A Novel Analysis and Simulation for MQW Laser Including Rollover Effect

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Based on a thermal lumped element model and on experimental results concerning the active region heating as a function of several injected current values, a very simple model involving Rollover effects has been implemented. The temperature rise in the active region of the laser with nanostructure due to current injection of magnitude current (I) was calculated according to ΔT=aI+bI^2-cL where a, b and c are coefficients which depend on the thermal resistance of the device and on the laser diode series resistance and turn-on voltage. L is the laser output power. We were able to analyze separately the effect of the diode thermal resistance, series resistance, turn-on voltage and characteristic temperature on the L–I curves.
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Quantum Well Laser; Rollover Effect; Temperature; L–I Characteristic

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