Thermal analysis of GaN-based laser diode mini-array

Thermal characteristics of multiple laser stripes integrated into one chip is investigated theoretically in this paper. The temperature pattern of the laser diode mini-array packaged in a TO-can is analyzed and optimized to achieve a uniform temperature distribution among the laser stripes and along the cavity direction. The temperature among the laser stripes varies by more than 5 K if the stripes are equally arranged, and can be reduced to less than 0.4 K if proper arrangement is designed. For conventional submount structure, the temperature variation along the cavity direction is as high as 7 K, while for an optimized trapezoid submount structure, the temperature varies only within 0.5 K.     

菲涅耳全息图的显微成像

从理论上描述了菲涅耳全息图显微成像的原理,并进行了菲涅耳全息图显微成像的初步试验。     

两个连通型球形液膜动态特性的研究

对小球形液膜内气体经由细管流向大球形液膜内过程中,球形液膜的动态特性做了理论模拟与实验研究．     

GaN基蓝绿光激光器发展现状与未来发展趋势

氮化镓(GaN)基蓝光和绿光激光器在投影显示、激光加工、激光照明、存储等领域具有重要的应用前景与广泛的市场需求.本文着重介绍了GaN基蓝光和绿光边发射激光器的技术难点和相应的解决方案.在GaN基蓝光与绿光激光器中,就制备高质量InGaN/GaN多量子阱、减少内部光学损耗、增加空穴注入效率等方面分别介绍了一些结构与工艺方面的优化方法.简要介绍了垂直腔面发射激光器(VCSEL)、分布式反馈激光器(DFB)的研究现状.     

气体粘滞系数的测定

本文对球形液膜内气体沿细管排出过程中，球形液膜的动态特性作了理论模拟推导，并用该实验装置对常温下空气的粘滞系数进行了测定。     

X光导管传输性能实验研究

建立了一套高精度的Ｘ光导管传输性能测试系统,对单管和复合管在Ｘ光能量为５￣３０ｋｅＶ范围内的传输性能进行了系统的实验研究。结果表明：单管对像能Ｘ光有良好的传输性能,复合管具有宽波段的传输特性。