We have studied the effects of geometric parameters of cavity (cavity length and ridge width) on the spectral and power characteristics of In_0.2Ga_0.8 N/GaN multiple quantum well (MQW) superluminescent light emitting diodes (SLDs) in the blue range by means of theoretical and numerical analysis in the rate equations model at steady state. We have solved Schrodinger equation and rate equations with no-k-selection energy-dependent gain and carrier density dependent quasi-Fermi level functions self-consistently. We have chosen a range of cavity length and ridge width corresponding to the conventional values and have examined them in the simulation procedure. Our simulation is implemented at room temperature and at a constant current density (15 kA/cm²). Our results show that the spectral radiation power, output power and full width at half maximum (FWHM) bandwidth are considered cavity length and ridge width dependent. It was found that the spectral radiation power and output power increases with increasing the cavity length, whereas the FWHM bandwidth decreases, also all of these characteristics increases with raising of the ridge width.

我们研究了腔的几何参数（腔长和脊宽）对 In _0.2 Ga _0.8  N/GaN 多量子阱 (MQW) 超辐射发光二极管 (SLD) 在蓝色范围内的光谱和功率特性的影响。稳态速率方程模型中的理论和数值分析。我们已经自洽地求解了薛定谔方程和速率方程，其具有无 k 选择能量相关增益和载流子密度相关准费米能级函数。我们选择了与常规值相对应的腔长和脊宽范围，并在模拟过程中对其进行了检查。我们的模拟是在室温和恒定电流密度 (15 kA/cm ²）。我们的结果表明，光谱辐射功率、输出功率和半峰全宽 (FWHM) 带宽被认为与腔长和脊宽有关。发现光谱辐射功率和输出功率随着腔长的增加而增加，而FWHM带宽减少，所有这些特性也随着脊宽度的增加而增加。