广东南方海岸科技服务有限公司及其主要产品简介

广东南方海岸科技服务有限公司（以下简称南方海岸公司）组建于2001年1月，是具有独立法人资格的高新科技经济实体。经营范围以电子通信和信息产业为主，主要服务于物流报关、海关监管、定位监控等领域，是集技、工、贸一体化的企业。被有关部门认定为“高新技术企业”，并取得“双软企业”证书：2006年被评为“优秀企业”：2006年4月通过ISO9001：2000质量管理体系的认证。     

激光微加工技术在ICF中的应用

建立以二极管泵浦的Nd：YAG连续固体激光器为基础的微结构加工平台。激光器谐振腔输出基横模，输出波长1064nm，采用调Q技术压缩脉宽，激光器输出峰值功率大于10w，可选择连续及脉冲工作方式。     

Time-Resolved Femtosecond Degenerate Four-Wave Mixing in LiNbO3：Fe,Mg Crystal

Forward degenerate four-wave mixing （DFWM） processes are investigated with a femtosecond pulsed laser in lithium niobate crystal doubly-doped with magnesium and iron （LiNbO3：Fe, Mg）. The pulse energy dependence reveals a pure third-order nonlinear response, and the third-order nonlinear susceptibility x^（3） in the material is evaluated to be 4.96 × 10^-13 esu. The time-resolved DFWM process shows a response time of x^（3） shorter than 100fs, which is due to the nonresonant electronic nonlinearities. Our results indicate that LiNbO3 crystals have potentials for ultrafast real-time optical processing systems, which require a large and fast x^（3） optical nonlinearity.     

Experimental 511 W Composite Nd：YAG Ceramic Laser

We demonstrate a 511 W laser diode pumped composite Nd：YAG ceramic laser. The optical pumping system is consisted of five laser diode stacked arrays arranged in a pentagonal shape around the ceramic rod whose size is φ6.35×144mm. When the pumping power is 1600 W, the cw laser output up to 511 W at 1064nm can be obtained with a linear piano-piano cavity, and the optical-to-optical efficiency is 31.9%. To our knowledge, this is the highest value of laser output by using a newly invented composite Nd：YAG ceramic rod as the gain medium.     

卷首语

在举国上下喜迎中国共产党第十七次全国代表大会即将召开之际，由广大编著者夜以继日、潜心打造的本期增刊与读者见面了。这正是：“人逢喜事精神爽，书遇贤明万古扬，学士能获此书卷，一览能悟其中涵”。     

关于高斯定理和电场叠加问题的再讨论

静电场由于有高斯定理和场强叠加原理，所以可采用两种不同途径求解电场。本文简明准确地论述了采用这两种不同途径时分别应注意的事项，并澄清了一些错误的看法。     

基于APP平台的TDC-3000 DCS实时数据存取技术

探讨了基于Honeywell APP平台的TDC-3000 DCS实时数据采集方法,阐述了通讯系统的构成和软件的设计思路,并进一步研究了基于B/S结构的DCS实时数据在局域网上的存取和应用问题.此技术已获成功应用并具有通讯系统结构简单、技术可靠、实施成本低等特点.     

Simulation of Patterns and Qualitative Analysis of Pattern Rotation in an End-Pumped Nd：YVO4 Laser

We simulate some laser output patterns observed in our previous experiment employing superposition of Laguerre- Gaussian modes. The rotating pattern is qualitatively analysed from the point of contemporary spatial burning hole effect of the lasing crystal.