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采用金属有机化合物气相淀积(MOCVD)方法成功地研制了具有两对梯度折射率(GRIN)异质结构的InGaAs/AlGaAs应变双量子阱激光器。该器的波长为970-982nm,室温连续工作阈值电流密度为140A/cm^2,工作在0.9A时单面连续输出光功率为520mW,工作在2.0时,连续输出光功率为1.49W,最高功率可达2.4W,微分量子效率高达0.83W/A。 相似文献
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It has been proved by ab initio calculation and theoretical analysis that there exist [N2]2--N2 molecular dimers with D2h symmetry group, and there also exists an electric dipole excimer-like transition a1B2g→a1B3u. The theoretical spectra accord with the experimental results for transition a1B2g→a1B3u. The stimulated emission characteristic of N2 molecular dimer was researched through the microwave excited highly pure nitrogen and the method of amplified spontaneous emission. The experimental results show that N2 molecular dimer has stimulated emission characteristics when the microwave power is more than 100 W and the N2 pressure is in the range from 260 Pa to 2200 Pa. 相似文献
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利用受激布里渊散射效应补偿激光大气传输过程中的畸变 总被引:2,自引:2,他引:0
提出了利用受激布里渊散射的阈值效应主动在非配合,扩展目标上实现小面积信标的方法,在不同的大气扰动条件(Cn^2=10^-16--10^-12)下,对激光的远距离(10km)补偿传输过程进行了模拟计算,获得了到达目标上的相位共轭光的光强分布。分别在不同的实验环境进行了激光补偿传输实验,其中激光补偿传输距离最远达到250m。实验结果证实了利用受激布里渊散射实现激光大气传输补偿的有效性,证明利用阈值效应在目标上主动获得小面积信标的方法是可行的。 相似文献