Suppressing fiber tip failure: On the road to 100 W-level 3-μm fiber lasers (Conference Presentation)

F. Maes, Y. Aydin, T. Poulin, S. Bah, V. Fortin, R. Vallée, M. Bernier
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Abstract

We report on the use of OH diffusion barrier coatings to suppress fiber tip degradation in high-power 3 μm fiber lasers. To this extent, silicon nitride thin-films are sputtered on the endface of a 20 W erbium-doped fluoride fiber laser at 2.83 μm. By monitoring the temperature evolution of the output fiber tip over a 24 hour time period, we validate the effectiveness of silicon nitride thin films in mitigating fiber tip degradation. These results, along with previous demonstrations, underline the potential of 3 μm fiber lasers to reach 100 W of output power in the near future.
抑制光纤尖端失效:迈向100w级3 μm光纤激光器(会议报告)
我们报道了在高功率3 μm光纤激光器中使用OH扩散势垒涂层抑制光纤尖端退化。为此,在20w掺铒氟化光纤激光器的2.83 μm处溅射氮化硅薄膜。通过监测输出光纤尖端在24小时内的温度变化,我们验证了氮化硅薄膜在减轻光纤尖端退化方面的有效性。这些结果与之前的演示一起,强调了3 μm光纤激光器在不久的将来达到100 W输出功率的潜力。
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