Fabrication of high-efficiency pump and signal combiner based on a thermally expanded core technique

Fabrication of high-efficiency pump and signal combiner based on a thermally expanded core technique
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基于热膨胀核心技术的高效泵和信号组合器的制造

DOI:
10.1016/j.optlastec.2015.06.009
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发表时间:
2015-12
期刊:
Optics &LaserTechnology
影响因子:
--
通讯作者:
江厚满
江厚满
中科院分区:
其他
文献类型:
--
作者:
赵柯;常欣祖;陈子伦;王泽锋;江厚满

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我们研制了一种基于热膨胀纤芯技术的高效率(6+1)×1泵浦信号合束器,用于高功率光纤激光器和放大器。热膨胀纤芯技术可以控制信号光纤的掺杂浓度,实现信号光纤和输出光纤模场尺寸的匹配。采用热膨胀纤芯的方法,在1064 nm波长处,信号耦合效率从51%提高到94%。我们的实验表明,在1500°C左右的温度下,我们的信号光纤的最佳加热时间约为30分钟。同时,在976 nm处,泵浦光耦合效率为96%~ 99%.高效率的泵浦和信号合成器可以在许多光纤激光器或放大器架构中实现。
We have developed a high-efficiency (6+1)×1 pump–signal combiner for high power fiber lasers and amplifiers based on a thermally expanded core technique. The thermally expanded core technique can control the dopant concentration of the signal fiber, which can realize mode field match between the mode field sizes of the signal fiber and the output fiber. Using a thermally expanded core method, signal coupling efficiency is increased from 51% to 94% at the wavelength of 1064 nm. And we experimentally demonstrate that the optimal heating time for our signal fiber is around 30 min at a temperature around 1500°C. At the same time, the pump coupling efficiency ranges from 96% to 99% at 976 nm. The high-efficiency pump and signal combiner can be implemented in many fiber laser or amplifier architectures.
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