摘要
提出盲目搜索与模式搜索相结合的多自由度搜索算法,完成半导体激光器(LD) 与单模光纤(SMF) 的自动对准.盲目搜索算法采用优化策略,使算法能够根据粗对准过程中的异常情况进行自适应调整,避免了搜索结果的不确定性,减少了粗对准时间.精密对准阶段的模式搜索法具有多自由度同时搜索的优点,因此对准速度较快,可以克服多自由度交叉耦合的影响,受噪声影响小.实验结果证明,使用模式搜索法进行xyz三自由度对准,对准时间为30～50s,定位成功率大于80%,对准速度和全局收敛性都优于传统的爬山法.
Multiple freedom search algorithms integrated with blind search and pattern search schemes are proposed for automatic alignment between a single-mode fiber and a laser diode. The blind search algorithm, on the basis of optimization strategy, can deal with exceptional situations by means of adaptive process, thus the uncertainty of blind search is eliminated and coarse alignment process is shortened. The pattern search method in fine alignment process can adjust misalignments on multiple axial directions simultaneously. Due to this advantage, the fine alignment process is shortened with little effects caused by noises and inter-coupling among axes on alignment automation. Experimental results demonstrate that both the alignment speed and global convergence of the proposed pattern search method are better than those of traditional hill-climbing algorithm. The cycle time for pattern search for xyz three-degree freedom alignment automation is 30-50s, and the success probability for locating optimal coupling position is better than 80%.
出处
《光电工程》
EI
CAS
CSCD
北大核心
2005年第8期32-35,共4页
Opto-Electronic Engineering
基金
国家自然科学基金重点资助项目(50235040)
关键词
半导体激光器
单模光纤
自动对准
搜索算法
Semiconductor lasers
Single-mode fiber
Automatic alignment
Search algorithms.
