摘要
高功率半导体激光器的结温上升,不仅影响它的输出功率、斜坡效率、阈值电流和寿命,而且还会产生光谱展宽和波长偏移.因此,热管理成为抽运激光器研发中的一个主要问题.本文首先建立了噪声功率谱与结温变化的物理模型,根据压缩感知理论,将测量得到含有高斯白噪声和1/f噪声的混叠复合噪声信号稀疏化后,进行基追踪算法去噪,通过改变算法的迭代次数及测量矩阵大小,获得1/f噪声电压功率谱与结温变化关系曲线,避免了直接测量结温的复杂性.通过数值估计结果,可以较好地指导高功率半导体激光器的热管理工作.
The junction temperature rise may not only affect its output power,slope efficiency,threshold current and lifetime,but also will cause the spectral broadening and wavelength shift in a high power semiconductor laser.Therefore,thermal management becomes one of the main problems in research and development of pump laser.In this paper the physical model of the noise power spectrum and junction temperature variation is first established;according to the compression sensing theory,and after sparsing the measured aliasing composite noise signal containing Gaussian white noise and 1/f noise,the basic pursuit denoising algorithm is used to do denoising;through changing the iterations times of the used algorithm and the size of measurement matrix,the curves of the ration between noise voltage power spectrum and junction temperature variation are obtained,thereby avoiding the complexity of direct measurement of the junction temperature.The numerical estimation results can better guid us in doing the thermal management work in high power semiconductor lasers.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2013年第10期189-194,共6页
Acta Physica Sinica
基金
国家自然科学基金(批准号:60976065)
国家自然科学基金青年基金(批准号:61006054)
国家重大科学仪器设备开发专项(批准号:2011YQ040077)
吉林省自然科学基金(批准号:201115125)资助的课题~~
关键词
1
f噪声
结温度
热阻
高功率半导体激光器
1/f noise
junction temperature
thermal resistance
high power semiconductor laser
