Date of Award
Master of Science in Optical Engineering
Department of Physics and Optical Engineering
This work investigates the effects of temperature on the operation and performance of indium-phosphide (InP) based high-power broad-area laser (BAL) diodes operating in the eye-safe regime (1.5 μm – 2.0 μm). Low temperature (-80C to 0C) operation using a cryogenically cooled system enables investigation of temperature-dependent parameters such as threshold current, slope efficiency, diode voltage, and power conversion efficiency (PCE) of devices. Building upon established empirical models that describe threshold current and slope efficiency as functions of temperature, a key additional parametric model is developed to describe diode voltage incorporating a temperature dependence. With the inclusion of this temperature-dependent voltage model, the operational parameters are shown to accurately describe diode laser performance and enable simple prediction of PCE over a range of temperatures. Low-temperature-optimized 14xx nm devices with power conversion efficiencies greater than 50% at 5W and 19xx nm devices with PCE greater than 25% at 2W are characterized; results validate the developed temperature-dependent voltage model.
Brodnik, Grant Matthew, "Development and Validation of an Empirical Temperature-Dependent Voltage Model for Diode Laser Characterization" (2016). Graduate Theses - Physics and Optical Engineering. 16.