N×N optical switch based on cascaded microring resonators

An N×N optical switch based on cascaded microring resonators on chip is proposed. As an example, the 4×4 optical switch is further investigated. It is successfully demonstrated that its insertion loss is relatively low as 2.2 dB, the crosstalk is negligible, and the extinction ratio (ER) is as large as 130 dB. Thermal tuning is employed to make the microrings be in resonance or not, which leads to a response time of several hundred microseconds. Alternatively, doping the desired waveguide regions with p-type or n-type dopants is able to achieve a better response time of several nanoseconds. The proposed design is easily integrated to a large scale with less microring resonators, which ensures the compact size and the low power consumption.     

中职学校专业信息管理系统的负载均衡设计

四川省教育厅职业与成人教育处组织课题小组开发了该省中等职业学校专业信息管理软件,该软件在运行过程中出现同一时段网络访问量较大,网络阻塞状况时有发生。结合负载均衡技术,本文对现有系统设计提出改进方案,使用Nginx服务器对用户的静态请求响应,并转发动态响应到Tomcat服务器,选择适合的分配决策算法实现负载均衡,提高系统性能。使用测试软件对改进方案进行了测试。     

四川省高职高专院校信息化管理建设

四川省高职高专院校数量多,分布区域广,发展不均衡,给领导部门的综合管理和统筹规划工作带来了很大难度。本文分析了四川省高职高专院校信息化管理中存在的问题,讨论了信息化管理建设的基本方案,探索了以信息化手段解决此问题的途径和方法。