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基于有限元方法(FEM)建立了精确的同轴封装无致冷分布反馈布拉格(DFB)激光器发射组件(TOSA)的热分析模型。对TOSA的热场分布和结温进行模拟和分析,并通过实验验证热学模型的正确性。利用极窄脉冲法测量TOSA的峰值波长随壳温的变化,拟合了壳温与波长的定量关系式。通过实测得到激光器的结温、晶体管形(TO)封装管壳的壳温与热功耗的关系曲线,并同时对不同热功耗下的激光器结温和TO封装管壳的壳温进行模拟,FEM模拟的结果与实测结果十分吻合。根据实测的温度梯度求得激光器组件在不同环境温度下的热阻。所建立的热学模型具有较高的精确性,可以用于TOSA及光收发模块的散热设计。
Based on the finite element method (FEM), an accurate thermal analysis model of coherently packaged DFB laser emitting module (TOSA) was established. The thermal field distribution and junction temperature of TOSA are simulated and analyzed, and the correctness of the thermal model is verified through experiments. Using the very narrow pulse method to measure the peak wavelength of TOSA with the shell temperature changes, fitted the shell temperature and wavelength quantitative relationship. The junction temperature of the laser, the shell temperature and the thermal power dissipation of the transistor package (TO) were obtained by real measurement. Simultaneously, the junction temperature of the laser and the shell temperature of the TO package tube were simulated. FEM The simulation results are in good agreement with the measured results. According to the measured temperature gradient obtained laser components in different ambient temperature thermal resistance. The established thermal model with high accuracy, can be used for TOSA and optical transceiver module thermal design.