Low-loss multi-mode anti-resonant hollow-core fibers.
Low-loss multi-mode anti-resonant hollow-core fibers.
复制标题
低损耗多模抗谐振空心光纤。
DOI：
10.1364/oe.492787
复制
发表时间：
2023
期刊：
影响因子：
3.8
通讯作者：
J. Knight
中科院分区：
文献类型：
--
作者：
Dakun Wu;Fei Yu;Cheng Wu;Meng Zhao;Jinhu Zheng;Lili Hu;J. Knight
在这项工作中，多模反谐振空芯光纤（AR-HCF）与18个扇形谐振器的制作和表征。纤芯直径与最低传输波段的传输波长之比高达85。在1 μm波长处测得的衰减低于0.1 dB/m，在弯曲半径小于8 cm处测得的弯曲损耗低于0.2 dB/m。 多模AR-HCF的模态内容的特征在于使用S2成像技术，并且使用23.6米的光纤长度总共识别出七个LP样模式。用于更长波长的多模AR-HCF是通过放大相同的设计来制造的，将传输窗口扩展到4 µm波长以上。低损耗多模AR-HCF可以应用于中等光束质量的高功率激光传输，其中期望更高的耦合效率和激光损伤阈值。
In this work, multi-mode anti-resonant hollow-core fiber (AR-HCF) with 18 fan-shaped resonators is fabricated and characterized. The ratio of core diameter over transmitted wavelengths in the lowest transmission band is up to 85. The measured attenuation at 1 µm wavelength is below 0.1 dB/m and the bend loss below 0.2 dB/m at a bend radius smaller than 8 cm. Modal content of the multi-mode AR-HCF is characterized using the S2 imaging technique and seven LP-like modes in total are identified using a 23.6 meter fiber length. Multi-mode AR-HCFs for longer wavelengths are fabricated by scaling up the same design, extending the transmission window beyond 4 µm wavelength. Low-loss multi-mode AR-HCF could find applications in the delivery of high-power laser light with a medium beam quality, where higher coupling efficiency and laser damage threshold are expected.