高功率半导体激光器1/f噪声特性及其检测新方法研究

项目名称： 高功率半导体激光器1/f噪声特性及其检测新方法研究

项目编号： No.61204055

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 信息四处

项目作者： 郜峰利

作者单位： 吉林大学

项目金额： 32万元

中文摘要： 针对大功率半导体激光器工作电流大的特殊性，重点研究其低偏置电流下的1/f噪声特性，用其幅度的大小及其随偏置电流的变化趋势，从器件的有源区和漏电特性的角度来分析器件的可靠性，继而与器件的老化实验数据进行对比，从而进一步建立高功率半导体激光器1/f噪声特性与器件可靠性的定量关系；根据1/f类分形信号的"自相似"和"长程相关性"的特点，把压缩传感技术用于1/f噪声参数的估计，构造其随机测量矩阵和传感矩阵，在较少的数据采集量的情况下，实现1/f噪声与加性白噪声的分离，最终建立一种有效的1/f噪声波形及其参数的估计方法，在此基础上，开发大功率半导体激光器低频电噪声的智能检测系统，从而克服传统的基于小波变换检测方法的效率低、所需数据量大的缺点；在上述基础上，最终实现高功率半导体激光器的可靠性进行综合估计和失效分析，建立一种快速、无损、有效的可靠性智能评价系统。

中文关键词： 半导体激光器；1/f噪声；可靠性；电导数；弱信号检测

英文摘要： We will investigate the characteristics in high-power semiconductor laser diodes (LDs) at low bias currents for the high-current particularity of high-power LDs. The device reliability will be analyzed from the active region and the creepage resistance based on the magnitude and its variety trend of 1/f noise magnitude vs the bias current, and then comparing them with the data from electrical aging for devices, the quantitative relation between the reliability and the characteristics of 1/f noise in high-power LDs can be achieved. According to the particularities of 'self similarity' and 'long-range relativity' of 1/f-type fractal signal, the compressive sensing theory will be applied to the estimation of 1/f noise and its parameters, and by constructing the random measurement matrix and the sensing matrix from the less acquired data, it can be achieved to separate the 1/f noise and additive white noise so that an effective method to estimate the parameters and waveform of 1/f noise can be established. Based on that, we will develop the intelligent detection system of low-frequency electrical noise of high-power LDs to conquer the detection disadvantages of wavelet transformation such as low efficiency and needed much data. On the basis of the above investigation, the integrative reliability estimation and inval

英文关键词： Semiconductor laser diodes；1/f noise；Reliability；Electrical derivative；Weak signal detection