Maurel Martin, Chafer Matthieu, Amsanpally Abhilash, Adnan Muhammad, Amrani Foued, Debord Benoit, Vincetti Luca, Gérôme Frédéric, Benabid Fetah
Opt Lett. 2018 Apr 1;43(7):1598-1601. doi: 10.1364/OL.43.001598.
We report on the development of hypocycloid core-contour inhibited-coupling (IC) Kagome hollow-core photonic crystal fibers (HC-PCFs) with record transmission loss and spectral coverage that include the common industrial laser wavelengths. Using the scaling of the confinement loss with the core-contour negative curvature and the silica strut thickness, we fabricated an IC Kagome HC-PCF for Yb and Nd:Yag laser guidance with record loss level of 8.5 dB/km associated with a 225-nm-wide 3-dB bandwidth. A second HC-PCF is fabricated with reduced silica strut thickness while keeping the hypocycloid core contour. It exhibits a fundamental transmission window spanning down to the Ti:Sa spectral range and a loss figure of 30 dB/km at 750 nm. The fibers' modal properties and bending sensitivity show these HC-PCFs to be ideal for ultralow-loss, flexible, and robust laser beam delivery.
我们报道了一种次摆线芯轮廓抑制耦合（IC）的Kagome空心光子晶体光纤（HC-PCF）的研制情况，其具有创纪录的传输损耗和光谱覆盖范围，涵盖了常见的工业激光波长。利用限制损耗与芯轮廓负曲率以及二氧化硅支柱厚度的比例关系，我们制造了一种用于镱和钕：钇铝石榴石激光导光的IC Kagome HC-PCF，其创纪录的损耗水平为8.5 dB/km，3 dB带宽为225 nm宽。制造了第二种HC-PCF，其二氧化硅支柱厚度减小，同时保持次摆线芯轮廓。它展示了一个延伸至钛宝石光谱范围的基本传输窗口，在750 nm处的损耗系数为30 dB/km。这些光纤的模式特性和弯曲灵敏度表明，这些HC-PCF非常适合超低损耗、灵活且坚固的激光束传输。
