Reply to Comment on ＇Q-switched Tm：YAG Laser Intracavity-Pumped by a 1064 nm Lasers

The essential goal of that paper （Chin. Phys. Lett. 26（2009） 124211） was to obtain a 2μm Tm：YAG laser with short pulse output. A Q-switched technique is used to realize the short pulse output in our laser system. The idea presented by Dr. Nieolaie Pavel is right. In our work, the directly Q-switched 2μm Tm：YAG pulse laser is not realized. As a matter of fact, the Q switch is used to directly switch the 1μm Nd：YAG laser.     

High-Efficiency High-Power Nd：YAG Laser under 885 nm Laser Diode Pumping

A high-efficiency high-power Nd：YAG laser under 885 nm laser diode （LD） pumping is demonstrated. The laser crystal is carefully designed, and the overlapping between the pump modes and the laser modes is optimized. The maximum output power at 1064 nm is 87W under the absorbed pump power 127.7 W, corresponding to a slope efficiency of 72.4% and an optical-optical efficiency of 68.1%. The optical-optical efficiency is 58.4% for the pump power emitted directly from the LD. To our best knowledge, this is the maximal optical-optical conversion efficiency obtained for the LD end-pumped Nd：YAG lasers so far.     

光抽运垂直扩展腔面发射激光器腔内倍频理论研究

建立了计入光波在非线性晶体中走离和相位失配情况下的光泵面发射激光器腔内倍频的速率方程理论模型,采用循环数值逼近的方法对该速率方程进行求解.以BBO,LBO,PPLN等非线性晶体为例,研究了晶体长度以及抽运功率等因素对倍频输出功率的影响,模拟结果与实验结果符合得较好. 关键词： 光抽运 垂直扩展腔面发射激光器 腔内倍频 数值模拟     

Passively mode-locked grown-together composite YVO4 /Nd:YVO4 crystal laser with a semiconductor saturable absorber mirror under 880-nm direct pumping

A passively mode-locked grown-together composite YVO 4 /Nd:YVO 4 crystal laser is demonstrated with a semiconductor saturable absorber mirror by 880-nm laser-diode direct pumping.Under the absorbed pump power of 24.9 W,a maximum output power of 10.5 W at the repetition rate of 77 MHz is obtained,corresponding to the optical-optical conversion efficiency of 42.1% and the slope efficiency of 53.4%.The pulse width measured is 33 ps at the output power of 10 W.     

激光分子束外延和关键技术研究

较为系统地介绍了一台激光分子束外延的总体结构和关键技术研究 .同时使用该设备和技术 ,实现精确控制原子尺度外延生长 ,获得原子尺度光滑表面的氧化物外延薄膜等实验结果 .     

腔内倍频Nd:YVO4晶体激光获得的大功率671nm红光

本文报道了由双端泵浦Nd:YVO4晶体产生1342nm基频光，经过非线性晶体LBO腔内产生的671nm的红光光源。泵浦功率19.5W时，产生的671nm的红光平均功率是2.9W。光光转换效率为14.9%。分析了最近泵浦光斑尺寸，最佳聚焦位置，减少热透镜效应对输出功率的影响。双端泵浦结构和准连续运行模式大大减弱了热透镜效应。     

全固态三基色激光大屏幕投影显示实验

三基色激光显示具有亮度高、色彩鲜艳、清晰度高、功耗低等优点，文章介绍了激光显示原理，并报道了用全固态非线性频率转换技术获得波长分别为671nm，532nm，和473nm的红绿蓝三基色激光，在国内首次实现全固态激光全色投影显示实验，同时提出了今后全固态激光显示的发展方向。     

全固态和频589nmNd∶YAG激光器

钠原子谱线激光光源不仅在光谱学研究中有广泛的应用 ,而且在军事应用方面 (如空间目标监测与识别 )有着重要应用。半导体抽运的固体激光器产生钠黄光具有效率高、体积小、光束质量好等优点 ,美、德、法、英等国开展了大量的研究 ,而我国尚未开展全固态钠信标光源研究。本实验组采用双棒串接热致双折射补偿谐振腔设计及临界相位匹配的KTP腔内和频方案 ,获得了大于 5 0 0mW 5 89nm的激光输出。图 1Nd∶YAG和频 5 89nm激光器光路图Fig .1Schemeof 5 89nmlaserwithsum frequencyNd∶YAG实验装置如图 1所示。谐振腔采用双棒串接复合折叠腔…     

脉冲激光淀积庞磁阻L_(1-x)Sn_xMnO_3薄膜的光电子能谱

１９９３年发现，钙钛矿结构稀土过渡金属的氧化物的磁电阻可达１０’一１０’％称之为庞磁电阻（Ｃｏｌｏｓｓａｌｍａｇｎｅｔｒｅｓｉｓｔａｎｃｅ）．这类氧化物材料，特别是它们的薄膜，在制备高密度磁数据存储器件和磁传感器等方面有十分重要的应用价值，因而受到人们的高度重视．这里，我们仍用脉冲激光淀积技术在ＬａＡＩＯ。卜０）衬底上外延生长了Ｌａｏ。ＳｎｏｌＭｎＯ。薄膜．薄膜的晶体结构由Ｘ射线８／２９扫描确定．我们着重用角分辨Ｘ射线光电子能谱（ＸＰＳ）研究了Ｌ。．ｓｓｎｏｌＭｎＯ。薄膜的表面电子态和最顶层表面…