Determining the relative impact of quantum efficiency and core propagation loss on efficient power scaling of thulium-doped silica fibre lasers
Determining the relative impact of quantum efficiency and core propagation loss on efficient power scaling of thulium-doped silica fibre lasers
复制标题
确定量子效率和纤芯传播损耗对掺铥石英光纤激光器有效功率缩放的相对影响
DOI：
10.1117/12.3002641
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发表时间：
2024
期刊：
影响因子：
--
通讯作者：
Buckthorpe M
中科院分区：
文献类型：
--
作者：
Buckthorpe M
提出了一种确定掺铊二氧化硅光纤量子效率和纤芯传播损耗的方法。结果提供的证据表明，热管理的纤维是一个关键的实验参数，实现准确的预测纤维性能与此方法。通过将这种“嵌套环”光纤浸没在温度控制的水浴中，测量到1.93的量子效率，提供了高掺杂水平成功促进“二对一”交叉弛豫过程的证据。纤芯传播损耗的测量结果为0.15 dB/m，这表明纤芯传播损耗是将功率有效缩放到千瓦范围的主要问题。
A method for determining the quantum efficiency and core propagation loss in thulium-doped silica fibres is presented. The results provide evidence that thermal management of the fibre is a critical experimental parameter for achieving accurate predictions of fibre performance with this method. By submerging this ‘nested-ring’ fibre in a temperature-controlled water bath, a quantum efficiency of 1.93 was measured, providing evidence that the high doping level is successfully promoting the ‘two-for-one’ cross-relaxation process. Measurements of core propagation loss gave 0.15 dB/m, which is suggestive that core propagation loss presents a major issue for efficient power scaling to the kilowatt regime.