DFB激光二极管电流-温度调谐特性的解析模型

Analytical model for the tuning characteristics of static,dynamic,and transient behaviors in temperature and injection current of DFB laser diodes

从DFB型激光二极管调谐机理出发,提出了电流-温度调谐特性的解析模型,通过实验测量结果辨识出模型参数,将模型应用于四个不同厂家的DFB型二极管激光器,得到激光器电流-温度调谐的解析模型;将模型预测值与实验测量值比较,相关系数均在0.9999以上.同时,利用CO2气体的多个吸收谱线测量激光的波长,验证了解析模型的预测波长值,与HITRAN谱库中CO2气体吸收波长的误差在3pm内.解析模型能够精确预测激光器在快速调谐过程中的瞬态输出波长,其精度能够满足光谱分析、光学相干测量等实用要求.

From the tuning mechanism of the DFB laser diode,we establish an analytical model for current and temperature tuning characteristics.The parameters of the model are identified by experimental results.The model is used to analyze the four DFB diode lasers,and the transient characteristics of the lasers are obtained.We also obtain the static characteristics of these lasers from Agilent 86142B Spectrometer.The comparison between the two values indicates that the correlation coefficients are both more than 0.9999.At the same time,according to the absorption spectrum of CO2 gas,we also measure the emission wavelength of lasers.Comparing it with the HITRAN spectrum of CO2 absorption lines,the two errors are shown to be within 3pm.The analytical model can accurately predict the transient output wavelength of lasers in tuning,the accuracy can meet the spectrum,optical coherence measurements and other practical requirements.