基于三层平板理论的LDA快轴发散角特性研究

Study on the Characteristics of Fast-axis Divergence Angle of LDA Based on Three-plane Waveguide Theory

以三层平板理论为基础,得出半导体激光器阵列(LDA)快轴方向发散角的简化模型,从该模型中可以看出,对LDA的快轴发散角的影响因素主要有:单个发光单元的波导结构(包括有源层厚度、折射率)、波长和bar间距。通过仿真给出了LDA快轴发散角在这几个主要因素影响下的变化趋势。为了解LDA快轴发散角特性以及它的应用提供了理论支持。

Based on the three-plane waveguide theory,a simplified fast axis divergence angle（FADA） model of three bars laser diode arrays（LDA） is presented.Furthermore,on the basis of the model,the main influencing factors on FADA are as following： waveguide structure of single radiant cell including thickness of active layer and refractive index,wavelength and space between bars.The responses of FADA to these factors are analyzed by simulations.The establishment of FADA model of LDA provides theory supports for the research and application of LDA far-field characteristics.