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The impact of nonequilibrium gain in a spectral laser diode model

机译：光谱激光二极管模型中非平衡增益的影响

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摘要

We describe the inclusion of nonequilibrium gain into a self-consistent 2.5D CW spectral laser diode model and report on the use of this model to investigate the origin of gain compression in a 975 nm high-brightness tapered QW laser diode. Nonequilibrium gain is calculated using a dynamic gain model, which simulates the dynamic relaxation of the quantum well carrier energy distributions under the influence of steady-state electrical and optical excitation. Calculated gain and spontaneous emission spectra are included in the laser model via parameterised look up tables. Both simulated and experimentally measured intracavity spontaneous emission spectra show an increased carrier density and a blue-shift of the gain maximum with increasing bias caused by carrier heating and spectral hole burning. The accurate incorporation of nonequilibrium gain compression is therefore vital for the accurate prediction of the operating characteristics of these devices and for the experimental determination of the active region temperature.
机译：我们描述了将非平衡增益包括在自洽的2.5D CW光谱激光二极管模型中，并报告了使用该模型来研究975 nm高亮度锥形QW激光二极管中增益压缩的起源。使用动态增益模型计算非平衡增益，该模型模拟在稳态电和光激发的影响下量子阱载流子能量分布的动态弛豫。通过参数化查找表将计算出的增益和自发发射光谱包括在激光模型中。模拟和实验测量的腔内自发光谱都显示出载流子密度增加，并且由于载流子加热和光谱烧孔引起的偏置增加，增益最大值出现蓝移。因此，准确地合并非平衡增益压缩对于准确预测这些设备的工作特性以及实验确定有源区温度至关重要。

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