Laser diode optical output is studied and modeled. Four major diode parameters (threshold current, slope efficiency, central wavelength of output, and full-width half maximum of output), which are dependent on diode junction temperature, determine the optical output. The physics and equations representative thereof for each parameter are presented and incorporated into a multiphysics model of a high-power laser system (HPLS) to study the optical power/thermal interactions. Simulations are compared to show how optical power output of an HPLS changes when the temperature dependence of parameters are and are not accounted for in the model. The decrease in laser light intensity out of the HPLS as junction temperature changes is also studied. Intensity is sometimes a more important consideration than optical power because for most applications, laser light is only effective when the output power is focused over a very narrow wavelength range. The research provides higher fidelity diode modeling for effectively understanding optical/thermal interactions and the price to be paid for improper diode thermal management. The research supports our main goal of more accurately representing the thermal loads from the individual components of an HPLS.

对激光二极管的光输出进行了研究和建模。取决于二极管结温度的四个主要二极管参数（阈值电流，斜率效率，输出的中心波长和输出的全角一半最大值）决定了光输出。给出了代表每个参数的物理原理和方程，并将其并入高功率激光系统（HPLS）的多物理场模型中，以研究光功率/热相互作用。通过仿真比较可以看出，当在模型中考虑和不考虑参数的温度依赖性时，HPLS的光功率输出将如何变化。还研究了随着结温的变化，HPLS中激光强度的降低。强度有时是比光功率更重要的考虑因素，因为在大多数应用中，仅当输出功率聚焦在非常窄的波长范围内时，激光才有效。该研究提供了更高保真度的二极管模型，以有效地理解光/热相互作用以及不正确的二极管热管理所要付出的代价。该研究支持我们的主要目标，即更准确地表示HPLS各个组件的热负荷。