scholarly journals Broadband tunable orbital angular momentum mode converter based on a conventional single-mode all-fiber configuration

2021 ◽  
Author(s):  
Shen Liu ◽  
Min Zhou ◽  
Zhe Zhang ◽  
Laipeng Shao ◽  
Yu Liu ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Single Mode ◽  
Mode Converter ◽  
Momentum Mode

scholarly journals Mode-Selective Photonic Lanterns for Orbital Angular Momentum Mode Division Multiplexing

2019 ◽  
Vol 9 (11) ◽  
pp. 2233 ◽  
Author(s):  
Yan Li ◽  
Yang Li ◽  
Lipeng Feng ◽  
Chen Yang ◽  
Wei Li ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Single Mode ◽  
Single Mode Fiber ◽  
Mode Division Multiplexing ◽  
Momentum Mode ◽  
Phase Differences

We analyze the mode evolution in mode-selective photonic lanterns with respect to taper lengths, affected by possible mode phase differences varying along the taper. As a result, we design a three-mode orbital angular momentum (OAM) mode-selective photonic lantern by optimizing the taper length with mode crosstalk below −24 dB, which employs only one single mode fiber port to selectively generate one OAM mode.

scholarly journals SDM transmission of orbital angular momentum mode channels over a multi-ring-core fibre

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Jingxing Zhang ◽  
Zhongzheng Lin ◽  
Jie Liu ◽  
Junyi Liu ◽  
Zhenrui Lin ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Single Mode ◽  
Single Mode Fibre ◽  
Strongly Coupled ◽  
Data Channel ◽  
Angular Momenta ◽  
Momentum Mode ◽  
First Time ◽  
Ring Core

Abstract Spatial division multiplexed optical transmission over a multi-ring-core orbital angular momentum (OAM) fibre is reported for the first time. The seven cores in the fibre each supports OAM modes belonging to mode groups (MGs) of topological charge |l| = 0–4. The MGs of |l| = 1–4 each contains four near-degenerate OAM modes that carry the combinations of opposite orbital and spin angular momenta. The weak coupling between these higher-order MGs as well as between the cores enables the simultaneous transmission of 56 OAM mode channels (two MGs per core of the topological charges |l| = 2 and 3) over the 60-km span, while only requiring modular 4 × 4 multi-input multi-output (MIMO) signal processing to equalize the mixing among the four mode channels in each MG that are strongly coupled – a feature that also minimizes the number of filter taps. The mode channels are launched using seven-core single-mode fibre fan-in devices, with the light in all seven cores converted into OAM modes via specially designed plates that carry seven off-axis-compensated phase masks matching the hexagonal configuration of the multi-core fibres. Each mode channel carries 10 WDM wavelengths, equivalently aggregating to a capacity of 31.4 Tbit/s (net 25.1 Tb/s) and a spectral efficiency (SE) of 62.7 bit/s/Hz (net 50.2 bit/s/Hz) with 28-GBaud QPSK modulation per data channel.

scholarly journals Temperature Insensitivity Polarization-Controlled Orbital Angular Momentum Mode Converter Based on an LPFG Induced in Four-Mode Fiber

Sensors ◽  
2018 ◽  
Vol 18 (6) ◽  
pp. 1766 ◽  
Author(s):  
Shen Liu ◽  
Yan Zhang ◽  
Cailing Fu ◽  
Zhiyong Bai ◽  
Ziliang Li ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Mode Converter ◽  
Momentum Mode

Controllable all-fiber orbital angular momentum mode converter

2015 ◽  
Vol 40 (18) ◽  
pp. 4376 ◽  
Author(s):  
Shuhui Li ◽  
Qi Mo ◽  
Xiao Hu ◽  
Cheng Du ◽  
Jian Wang
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Mode Converter ◽  
Momentum Mode

Demonstration of QPSK data correlation and equalization using a tunable optical tapped delay line based on orbital angular momentum mode delays

2022 ◽  
Vol 503 ◽  
pp. 127438
Author(s):  
Ahmed Almaiman ◽  
Hao Song ◽  
Amir Minoofar ◽  
Haoqian Song ◽  
Runzhou Zhang ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Delay Line ◽  
Data Correlation ◽  
Momentum Mode

scholarly journals Orbital angular momentum mode-demultiplexing scheme with partial angular receiving aperture

2015 ◽  
Vol 23 (9) ◽  
pp. 12251 ◽  
Author(s):  
Shilie Zheng ◽  
Xiaonan Hui ◽  
Jiangbo Zhu ◽  
Hao Chi ◽  
Xiaofeng Jin ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Momentum Mode
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