光学
角动量
芯(光纤)
物理
扭转
纤维
波长
调制(音乐)
长周期光纤光栅
模式(计算机接口)
梁(结构)
材料科学
光纤
渐变折射率纤维
光纤传感器
几何学
数学
量子力学
声学
复合材料
计算机科学
操作系统
作者
Jiajing Tu,Jing‐biao Wu,Chuangrong Huang,Jie Zhang,Shecheng Gao,Weiping Liu,Zhaohui Li
出处
期刊:Optics Letters
[The Optical Society]
日期:2023-03-21
卷期号:48 (7): 1634-1634
被引量:5
摘要
We investigate the orbital angular momentum (OAM) mode-generating process of a long-period onefold chiral fiber grating (L-1-CFG) based on a helically twisted hollow-core antiresonant fiber (HC-ARF). Taking the right-handed L-1-CFG for an example, we theoretically and experimentally prove that the first-order OAM+1 mode can be generated by only inputting a Gaussian beam. We fabricated three right-handed L-1-CFG samples based on the helically twisted HC-ARF with twist rates (α) of -0.42, -0.50, and -0.60 rad/mm, where the twisted HC-ARF with α of -0.42 rad/mm can achieve high OAM+1 mode purity of 94%. Subsequently, we present simulated and experimental transmission spectra at the C-band, and sufficient modulation depths were obtained at wavelengths of 1550 nm and 1561.5 nm in the experiment.
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