半导体DH条形激光器的瞬态稳定性与稳态稳定性的关系

从实验上研究了GaAs-Al_xGa_(1-x)AsDH条形激光器的稳态束腰、束宽和激光功率随电流变化的规律与瞬态自脉动的关系。随着稳态注入电流的变化,激光器的垂直束腰位置都在镜面上,其束宽不变;不管水平束腰位置是否有变化,水平束腰宽有明显变化时,其瞬态往往出现自脉动,而出现自脉动的电流范围往往在光功率特性的A、B扭折之间。

Relationship between transient and stationary stability in semiconductor stripe-geometry DH lasers

The variation of beam waist position, beam width and light power with injection current in GaAs-AlXGa1-XAs DH stripe-geometry lasers, and the relationship between the station-ary stability and transient self-sustained pulsation have been studied experimentally. When the injection current varies, the position of the vertical beam waist for all types of lasers is always at the laser facet, the vertical beam width remains unchanged. No matter whether or not there are changes in the horizontal beam waist position, the transient self-sustained pulsation usually appears when the horizontal width of the beam waist varies considerably, and the current range for which self-sustained pulsation occurs usually lies between A, B kinks in the light power characteristics.