本文从理论上分析了实现 In Ga As/Ga As/Al Ga As应变量子阱激光器高光功率转换效率、高输出功率的有效途径 ,并优化了器件结构 ,可以同时获得低的腔面光功率密度和小的垂直于结平面远场发散角 .利用分子束外延生长构成了高质量 In Ga ...本文从理论上分析了实现 In Ga As/Ga As/Al Ga As应变量子阱激光器高光功率转换效率、高输出功率的有效途径 ,并优化了器件结构 ,可以同时获得低的腔面光功率密度和小的垂直于结平面远场发散角 .利用分子束外延生长构成了高质量 In Ga As/Ga As/Al Ga As应变量子阱激光器 ,其最高光功率转换效率为 53%、最大输出功率为 3.7W,垂直于结平面方向远场发散角为展开更多
The technology of He ion implantation for improving the catastrophic optical damage (COD) level of 980nm semiconductor lasers is introduced.After He ion implantation,p-GaAs obtain higher resistivity than before.About...The technology of He ion implantation for improving the catastrophic optical damage (COD) level of 980nm semiconductor lasers is introduced.After He ion implantation,p-GaAs obtain higher resistivity than before.About 25μm-long current non-injection regions are introduced near both facets,where the injection current is blocked by high resistivity area.The current non-injection regions can reduce carriers inject to facets,and the rate of the non-radiative recombination are reduced.So the COD level is higher than before.The He ion implantation LDs exhibit no COD failure until the rollover occure at a mean maximum power of 440.5mW.Mean COD level of conventional LDs is given as 407.5mW.Compared to conventional LDs,the mean maximum output power level of He ion implantation LDs is improved by 8%.展开更多
The mechanical and electric characteristics of a cantilever beam micro opto mechanical switch are studied theoretically,with which the dependence of the flexion on the applied voltage is derived,as well as the form...The mechanical and electric characteristics of a cantilever beam micro opto mechanical switch are studied theoretically,with which the dependence of the flexion on the applied voltage is derived,as well as the formula of the threshold voltage.The applied voltage,having no connection with the width of the beam,is in inverse proportion to the square of the beam's length.The deflection at the beam's tip cannot exceed 1/3 of the distance between two adjacent electrodes.These results are the basis of the switch design and development.展开更多
文摘本文从理论上分析了实现 In Ga As/Ga As/Al Ga As应变量子阱激光器高光功率转换效率、高输出功率的有效途径 ,并优化了器件结构 ,可以同时获得低的腔面光功率密度和小的垂直于结平面远场发散角 .利用分子束外延生长构成了高质量 In Ga As/Ga As/Al Ga As应变量子阱激光器 ,其最高光功率转换效率为 53%、最大输出功率为 3.7W,垂直于结平面方向远场发散角为
文摘The technology of He ion implantation for improving the catastrophic optical damage (COD) level of 980nm semiconductor lasers is introduced.After He ion implantation,p-GaAs obtain higher resistivity than before.About 25μm-long current non-injection regions are introduced near both facets,where the injection current is blocked by high resistivity area.The current non-injection regions can reduce carriers inject to facets,and the rate of the non-radiative recombination are reduced.So the COD level is higher than before.The He ion implantation LDs exhibit no COD failure until the rollover occure at a mean maximum power of 440.5mW.Mean COD level of conventional LDs is given as 407.5mW.Compared to conventional LDs,the mean maximum output power level of He ion implantation LDs is improved by 8%.
文摘The mechanical and electric characteristics of a cantilever beam micro opto mechanical switch are studied theoretically,with which the dependence of the flexion on the applied voltage is derived,as well as the formula of the threshold voltage.The applied voltage,having no connection with the width of the beam,is in inverse proportion to the square of the beam's length.The deflection at the beam's tip cannot exceed 1/3 of the distance between two adjacent electrodes.These results are the basis of the switch design and development.
