针对隧道再生半导体激光器,建立了内部的热源分布模型。利用有限元方法模拟计算得到了两有源区隧道再生半导体激光器在不同占空比下工作时的热弛豫积累过程。模拟结果表明,芯片达到平衡前的热弛豫积累时间和达到热平衡时的温度均随注入电流占空比的增加而增加,热弛豫积累时间小于200ms。芯片内部温度分布表明,靠近衬底的有源区温度略高于靠近热沉的有源区温度,但温度差较小,热效应造成的波长漂移不会造成双峰现象。实验测量了在相同的边界条件下,不同占空比下器件的峰值波长,将其转换为温升,与模拟结果吻合。
Heat source of tunnel regeneration semiconductor laser has been discussed.Thermal relaxation accumulating process and thermal homeostasis distribution of tunnel regeneration semiconductor laser with two active regions are simulated by using the finite element method at different current pulse work with constant temperature boundary conditions.It is found that thermal relaxation accumulating time and the thermal homeostasis temperature also increase with the increasing of the injecting current pulse temperat...