材料科学
带宽(计算)
光学
联轴节(管道)
光纤
涡流
旋涡
模式音量
模式(计算机接口)
单模光纤
模耦合
物理
机械
多模光纤
复合材料
塑料光纤
工程类
电信
计算机科学
操作系统
作者
Chengliang Zhu,Chengfeng Tang,Xinyue Meng,Jinming Chang,Tonglei Cheng,Yongqi Zhao
出处
期刊:Optics Letters
[The Optical Society]
日期:2024-04-11
卷期号:49 (10): 2561-2561
摘要
A strong-coupling helical fiber needle (HFN) is proposed and demonstrated for the realization of bandwidth-enhanced broadband optical vortex beam (OVB) generation. The HFN is based on a single mode fiber and operates at the dispersion-turning-point (DTP) of the lowest radial order of the cladding mode (i.e., LP 11 ) but with a remarkably high mode coupling efficiency. By utilizing this novel, to the best of our knowledge, HFN, successful generation of the first-order OVB with an impressive bandwidth up to 556 nm at −10 dB and a center wavelength of ∼1570 nm has been achieved. This represents the broadest bandwidth demonstrated among all fiber grating-based OVB generators to date. The proposed HFN-based OVB generator exhibits a relatively compact size, ultra-wide bandwidth, and customizable center wavelength, making it highly promising for applications in optical vortex-based endoscopic imaging as well as particle detection and manipulation.
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