The temperature dependency of erbium doped distributed feedback fiber laser output performance is experimentally and theoretically investigated with two major pump schemes. The output power declined linearly as temperature increased from 30 °C to 120 °C for 980 nm and 1480 nm pumped test laser while the later exhibited stronger heat susceptibility. Further experiment and analysis identified the temperature induced absorption and emission cross section variation at pump and signal wavelength together with population inversion rate difference are the originations of the thermal sensitivity discrepancy between the two pump setups. Associated theoretical simulation concludes the erbium doped distributed feedback fiber laser thermal output sensitivity is dependent on its gain dynamics and grating structure simultaneously.

中文翻译：

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热对掺铒分布反馈光纤激光器输出功率影响的比较研究

掺铒分布式反馈光纤激光器输出性能的温度依赖性通过两种主要泵浦方案进行了实验和理论研究。对于 980 nm 和 1480 nm 泵浦测试激光器，随着温度从 30 °C 升高到 120 °C，输出功率线性下降，而后者表现出更强的热敏感性。进一步的实验和分析确定了泵浦和信号波长处的温度引起的吸收和发射截面变化以及粒子数反转率差异是两种泵浦设置之间热灵敏度差异的根源。相关的理论模拟得出结论，掺铒分布式反馈光纤激光器的热输出灵敏度同时取决于其增益动力学和光栅结构。