Orbital Angular Momentum Mode Converter Based on Helical Long Period Fiber Grating Inscribed by Hydrogen–Oxygen Flame

2018 ◽  
Vol 36 (9) ◽  
pp. 1683-1688 ◽  
Author(s):  
Cailing Fu ◽  
Bin Yu ◽  
Yiping Wang ◽  
Shen Liu ◽  
Zhiyong Bai ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Mode Converter ◽  
Fiber Grating ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Momentum Mode ◽  
Period Fiber Grating ◽  
Oxygen Flame

All-fiber third-order orbital angular momentum mode generation employing an asymmetric long-period fiber grating

2020 ◽  
Vol 45 (13) ◽  
pp. 3621 ◽  
Author(s):  
Xiaodong He ◽  
Jiajing Tu ◽  
Xiaowen Wu ◽  
Shecheng Gao ◽  
Lei Shen ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Fiber Grating ◽  
Third Order ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Momentum Mode ◽  
Period Fiber Grating ◽  
Mode Generation

All-fiber linear polarization and orbital angular momentum modes amplifier based on few-mode erbium-doped fiber and long period fiber grating

2018 ◽  
Vol 16 (10) ◽  
pp. 100604 ◽  
Author(s):  
Jianfei Xing Jianfei Xing ◽  
Jianxiang Wen Jianxiang Wen ◽  
Jie Wang Jie Wang ◽  
Fufei Pang Fufei Pang ◽  
Zhenyi Chen Zhenyi Chen ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Linear Polarization ◽  
Fiber Grating ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Erbium Doped ◽  
Period Fiber Grating

scholarly journals Orthogonal long-period fiber grating for directly exciting the orbital angular momentum

2020 ◽  
Vol 28 (18) ◽  
pp. 27044
Author(s):  
Zhao Liu ◽  
Guoxuan Zhu ◽  
Yali Li ◽  
Jian Yu ◽  
Zhiyong Bai ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Fiber Grating ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Period Fiber Grating

All-fiber second-order Mode Converter Based on Twisted Long-period Fiber Grating

2021 ◽  
Author(s):  
Mao Feng ◽  
Wenzhe Chang ◽  
Baiwei Mao ◽  
Pan Wang ◽  
Zhi Wang ◽  
...  
Keyword(s):  
Second Order ◽  
Mode Converter ◽  
Fiber Grating ◽  
Order Mode ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Period Fiber Grating

scholarly journals Wavelength-Tunable, Ultra-Broadband, Biconical, Long-Period Fiber Grating Mode Converter Based on the Dual-Resonance Effect

Sensors ◽  
2021 ◽  
Vol 21 (17) ◽  
pp. 5970
Author(s):  
Yu Zheng ◽  
Huiyi Guo ◽  
Mao Feng ◽  
Zhi Wang ◽  
Yange Liu
Keyword(s):  
Mode Conversion ◽  
Resonance Effect ◽  
Mode Converter ◽  
Ultra Wideband ◽  
Fiber Grating ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Wavelength Tunable ◽  
Dual Resonance ◽  
Period Fiber Grating

We demonstrated a wavelength-tunable, ultra-wideband, biconical, long-period fiber grating (BLPFG) mode converter in a two-mode fiber based on fusion taper technology and CO2 laser writing technology. Theoretical and experimental results show that after changing the diameter of the two-mode fiber by fusing and tapering, the dispersion turning point of the fiber is adjusted and wavelength-tunable broadband mode conversion is achieved efficiently. Theoretical simulation shows that the mode conversion bandwidth can cover the O + E + S + C band. In the experiment, we fabricated adiabatic tapers with cladding diameters of 113 μm and 121 μm and wrote gratings on these tapers to achieve dual-resonance coupling, thus realizing mode conversion from LP01 to LP11, with a 15 dB bandwidth of 148.8 nm from 1229.0 nm to 1377.8 nm and of 168.5 nm from 1319.7 nm to 1488.2 nm, respectively. As far as we know, this is the first time that fusion taper technology has been used to adjust the window of the dual-resonant coupling of an optical fiber. This work broadens the scope of application of the dual-resonance effect and proposes a general method for widening the bandwidth of a fiber grating with tunable wavelength.

The study of large-broadband OAM mode converter based on helical long period fiber grating

2019 ◽  
Author(s):  
Minhui Cheng ◽  
Jihong Liu ◽  
Liuqian Zhu ◽  
Li Yang ◽  
Dongdong Han ◽  
...  
Keyword(s):  
Mode Converter ◽  
Fiber Grating ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Period Fiber Grating

scholarly journals Generation of Orbital Angular Momentum Modes Using Fiber Systems

2019 ◽  
Vol 9 (5) ◽  
pp. 1033 ◽  
Author(s):  
Hongwei Zhang ◽  
Baiwei Mao ◽  
Ya Han ◽  
Zhi Wang ◽  
Yang Yue ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Fiber Grating ◽  
Spatial Methods ◽  
Long Period ◽  
Significant Interest ◽  
Low Insertion Loss ◽  
Period Fiber Grating ◽  
Fiber Modes ◽  
Mode Generation

Orbital angular momentum (OAM) beams, characterized by the helical phase wavefront, have received significant interest in various areas of study. There are many methods to generate OAM beams, which can be roughly divided into two types: spatial methods and fiber methods. As a natural shaper of OAM beams, the fibers exhibit unique merits, namely, miniaturization and a low insertion loss. In this paper, we review the recent advances in fiber OAM mode generation systems, in both the interior and exterior of the beams. We introduce the basic concepts of fiber modes and the generation and detection theories of OAM modes. In addition, fiber systems based on different nuclear devices are introduced, including the long-period fiber grating, the mode-selective coupler, microstructural optical fiber, and the photonic lantern. Finally, the key challenges and prospects for fiber OAM mode systems are discussed.

scholarly journals Broadband flat-top second-order OAM mode converter based on a phase-modulated helical long-period fiber grating

2021 ◽  
Author(s):  
hua zhao ◽  
zhen zhang ◽  
Miaomiao Zhang ◽  
Yuanyuan Hao ◽  
Peng Wang ◽  
...  
Keyword(s):  
Second Order ◽  
Mode Converter ◽  
Fiber Grating ◽  
Long Period Fiber Grating ◽  
Long Period ◽  
Period Fiber Grating
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