论文标题
关于在高功率浓度掺杂纤维激光器中启动纤维保险丝损伤
On the initiation of fiber fuse damage in high-power ytterbium-doped fiber lasers
论文作者
论文摘要
纤维保险丝效应可能自发地发生并沿光纤传播，从而造成广泛的损害。它威胁所有涉及光纤的应用。本文提出了两个结果。首先，它确定二氧化硅纤维中的纤维融合（IFF）的启动是由缺陷诱导的吸收引起的。首次使用3D固态传热模型模拟了IFF的临界温度和关键光电功率，该模型具有由缺陷诱导的吸收产生的热源。在这种方法中，可以独特地确定缺陷的形成能，从而提供有关纤维融合的化学原因的关键信息。其次，本文提供了一种评估纤维激光器工作温度的方法。推导了沿增益纤维的工作温度的一般分析解决方案。使用10/130-μmYDF的结果计算了976 nm激光二极管（LD）泵送和1018 nm串联的Ytterbium掺杂纤维（YDF）放大器的结果。讨论了纤维融合引起的潜在限制。
Fiber fuse effect can occur spontaneously and propagate along optical fibers to cause wide-spread damage; it threatens all applications involving optical fibers. This paper presents two results. First, it establishes that the initiation of fiber fuse (IFF) in silica fibers is caused by defect-induced absorption. Critical temperatures and critical optical powers for IFF are simulated for the first time using a 3D solid-state heat transfer model with heat source generated by defect-induced absorption. In this method, formation energies of the defects can be uniquely determined, which offers critical information on the chemical reasons for fiber fuse. Second, this paper offers a method to evaluate operating temperatures of fiber lasers. General analytical solutions of the operating temperatures along gain fibers are deduced. Results of 976-nm laser-diode-(LD)-pumped and 1018-nm tandem-pumped ytterbium-doped fiber (YDF) amplifiers using 10/130-μm YDFs are calculated. Potential limits caused by fiber fuse are discussed.
