The thermal activation of the bismuth active center associated with silicon (BAC-Si) in bismuth/erbium-codoped optical fiber (BEDF) has been investigated in terms of temperature, dwell time, and cooling rate. The experimental results show that temperature and dwell time have significant effects on activation of BAC-Si, and the underlying mechanism is further discussed. Especially, through the optimization of these dynamic parameters, the thermal activation of BAC-Si is achieved with a maximum enhancement ${\sim}{2.5}$ times of peak luminescence intensity and 1.6 dB/m increment of the on–off gain at ${\sim}{1405}\;{\rm nm}$. Such discovery clearly indicates that thermal treatment with optimized temperature, dwell time, and cooling rate could be an effective way to activate BAC-Si in BEDF.

中文翻译：

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铋/掺co光纤中BAC-Si热活化的动力学研究

铋/掺-光纤（BEDF）中与硅（BAC-Si）结合的铋活性中心的热活化已经从温度，停留时间和冷却速率方面进行了研究。实验结果表明，温度和停留时间对BAC-Si的活化有重要影响，并进一步探讨了其潜在机理。尤其是，通过优化这些动态参数，可以实现BAC-Si的热激活，其最大发光强度是峰值发光强度的$ {\ sim} {2.5} $倍，并且在开关增益为1.6 dB / m时增加$ {\ sim} {1405} \; {\ rm nm} $。这样的发现清楚地表明，以最佳的温度，保压时间和冷却速率进行热处理可能是激活BEDF中BAC-Si的有效方法。