Asymmetric broad-waveguide separate-confinement heterostructure (BW-SCH) quantum well (QW) laser diode emitting at 808 nm is analyzed and designed theoretically. The dependence of the optical field distribution, vertical far-field angle, and internal loss on different thicknesses of the upper waveguide layer is calculated and analyzed. Calculated results show that when the thicknesses of the lower and upper waveguide layers are 0.45 and 0.3 \mu m, respectively, for the devices with 100-\mu m-wide stripe and 1000-\mu m-long cavity, an output power of 7.6 W at 8 A, a vertical far-field angle of 37°, a slope efficiency of 1.32 W/A, and a threshold current of 189 mA can be obtained.

计算了半导体激光器的激射波长与量子阱宽度以及有源层中In组分的关系,确定了941nm波长的量子阱宽度和In组分.并利用金属有机化合物气相淀积(MOCVD)技术生长了InGaAs/GaAs/AlGaAs分别限制应变单量子阱激光器材料.利用该材料制成半导体激光器线阵列的峰值波长为940.5 nm,光谱的FWHM为2.6 nm,在400 μs,50 Hz的输入电流下,输出峰值功率达到114.7 W(165 A),斜率效率高达0.81 W/A,阈值电流密度为103.7 A/cm2,串联电阻5 mΩ,最高转换效率可达36.9%.

利用金属有机化合物气相淀积(MOCVD)技术生长了InGaAs/GaAs分别限制应变单量子阱激光器工作物质.利用它制成半导体激光器线阵列,其峰值波长为900nm,光谱半高全宽小于4nm,在脉宽1000μs、13Hz的输入电流抽运下,输出峰值功率接近60W(室温,电流87A),斜率效率为0.64W/A.

介绍了研究分别限制结构的(SCH)InGaAsP-GaAs半导体激光器所得到的最新成果。利用引进的俄国技术,基于量子阱(QW)结构的InGaAsP-GaAs激光器,可用短时间液相外延(LPE)技术制造。在(100)GaAs衬底上制成的InGaAsP-GaAs分别限制结构的激光器,主要参数如下:发射波长K=808 nm,阈值电流密度J=300 A/cm2,对于条宽w=100 μm的激光器,连续功率为1～2 W。对制成的激光器,进行连续1000 h的实际寿命试验,并讨论了对寿命的影响因素。