Bismuth/erbium co-doped optical fiber fabricated through 3D silica lithography is thermally treated with various conditions. Then the thermal treatment effect on bismuth active centers (BACs) in this fiber is investigated. The thermal bleaching of the BAC associated with Al and the BAC associated with Si is observed after thermal treatment at high temperatures (300°C–800°C). It is found that the absorption and luminescence of BACs dramatically decrease after the thermal treatment, even totally bleaching at 700°C. The results show that the temperature and dwell time have significant effects on the thermal bleaching and activation of BACs. The underlying mechanisms of these thermal-induced effects are further discussed.

中文翻译：

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通过3D二氧化硅光刻技术制造的铋/ co共掺杂光纤中BAC的热漂白。

通过3D二氧化硅光刻技术制造的铋/ er共掺杂光纤在各种条件下进行了热处理。然后研究了该纤维对铋活性中心（BAC）的热处理效果。在高温（300°C–800°C）下进行热处理后，观察到与铝有关的BAC和与硅有关的BAC的热漂白。发现在热处理之后，BAC的吸收和发光显着降低，甚至在700℃下完全漂白。结果表明，温度和停留时间对BAC的热漂白和活化有重要影响。这些热效应的潜在机理将进一步讨论。