PIN光探测器的小信号电路模型参数的提取  

Extraction of PIN photodetector small-signal circuit model

作　　者：苗昂[1] 黄永清[1] 李轶群[1] 吴强[1] 王睿[1] 王松[1] 黄辉[1] 任晓敏[1] 

机构地区：[1]北京邮电大学光通信与光波技术教育部重点实验室,北京100876

出　　处：《光电子．激光》2008年第7期891-894,共4页Journal of Optoelectronics·Laser

基　　金：国家重点基础研究发展计划资助项目(2003CB314901);国家自然科学基金资助项目(60576018);教育部"新世纪人才支持计划"资助项目(NCET-05-0111)

摘　　要：提出了一种利用自适应遗传算法提取p-i-n光探测器小信号电路模型参数的方法。文章首先根据p-i-n光探测器的物理结构确定其等效电路模型,进而采用自适应遗传算法对测量的S参数进行拟合,提取模型参数。自适应遗传算法自动优化交叉概率和变异概率,避免了以往遗传算法中易早熟的缺点。利用该法成功提取出模型的10个参数,建立光探测器小信号电路模型。在130 MHz^20 GHz范围内的实验结果表明,模型仿真结果和测量结果相吻合,证明了这种参数提取方法的可靠性。A parameter extraction technique for p-i-n photodetector small-signal circuit model using self-adaptive genetic algorithm is proposed.Firstly the equivalent lumped circuit is determined based on the device physical structure,then the self-adaptive genetic algorithm is used to fit the measured S parameters to extract model parameters.Reproduction,crossover and mutation operators are automatically optimized in the algorithm,which avoids the premature convergence in traditional genetic algorithm.Good agreement between the model and measured device performance has been achieved in a range from 130 MHz to 20 GHz,and the proposed method is proved feasible.

关 键 词：光探测器 小信号电路模型 自适应遗传算法 

分 类 号：TN312.4[电子电信—物理电子学]