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浏览/检索结果: 共2条，第1-2条 帮助 已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 Analysis of sand particles' lift-off and incident velocities in wind-blown sand flux 期刊论文 ACTA MECHANICA SINICA, 2013, 卷号: 29, 期号: 2, 页码: 158-165 作者:  Bo, TL;  Zheng, XJ;  Duan, SZ;  Liang, YR 收藏  |  浏览/下载：4/0  |  提交时间：2015/12/22 Probability distribution  Sand particles' horizontal velocities  Sand particles' vertical velocities  Center of the Gaussian distribution  Decay constant of the negative exponential distribution   A novel bottom-emitting vcsel's one-dimension array (EI CONFERENCE) 会议论文 Optoelectronic Materials and Devices III, October 27, 2008 - October 30, 2008, Hangzhou, China Cui J.; Ning Y.; Li T.; Zhang Y.; Liu G.; Zhang X.; Wang Z.; Shi J.; Kong P.; Qin L.; Liu Y.; Wang L. 收藏  |  浏览/下载：17/0  |  提交时间：2013/03/25 A novel 980nm bottom-emitting VCSELs array with high power density and good beam property of Gaussian far-field distribution is reported. This array is composed of 5 symmetrically-arranged elements of 200m  150m and 100m-diameter  with the center spacings of 300m and 250m respectively. The maximum power is 880mW at a current of 4A  corresponding to lKW/cm2 average optical power density. The differential resistance is 0.09 with a threshold of 0.56A. The novel array is compared with a 300m-aperture-size single device and a 44 2-D array with 50m element aperture size and 250m centre spacing. The three devices have the same lasing area. The conclusion is that the novel array is better in the property of output power  threshold current  lasing spectra  far-field distribution etc. 2008 SPIE.