研究目的
To design, fabricate, and study ultranarrow-waveguide heterostructure lasers emitting in the spectral range 1000 – 1100 nm, assess the effects of basic parameters such as the doping profile and waveguide thickness, and energy barrier layers on the laser performance.
研究成果
Ultranarrow-waveguide heterostructure lasers have acceptable threshold characteristics and offer considerable room for performance optimization by varying the doping profile and waveguide thickness and utilizing energy barrier layers. Further research should be directed towards a search for and optimization of heterostructure designs, especially the emitter doping profile and waveguide thickness.
研究不足
The ultranarrow-waveguide heterostructure lasers are somewhat inferior in power characteristics to lasers with the standard heterostructure design, mainly due to the rapid decrease in internal quantum efficiency with increasing pump current. The addition of barrier layers raises the internal quantum efficiency but leads to a slight increase in the slope of the internal optical loss as a function of current.
