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.

Efficient 1550 nm Diffractive Log-Polar Element Based Orbital Angular Momentum Mode-division Multiplexing

2017 ◽  
Author(s):  
Wenzhe Li ◽  
Keith Miller ◽  
Indumathi Raghu Srimathi ◽  
Yuan Li ◽  
Kaitlyn S. Morgan ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Mode Division Multiplexing ◽  
Momentum Mode

Terabit-Scale Orbital Angular Momentum Mode Division Multiplexing in Fibers

Science ◽  
2013 ◽  
Vol 340 (6140) ◽  
pp. 1545-1548 ◽  
Author(s):  
Nenad Bozinovic ◽  
Yang Yue ◽  
Yongxiong Ren ◽  
Moshe Tur ◽  
Poul Kristensen ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Optical Fiber ◽  
Orbital Angular Momentum ◽  
Degrees Of Freedom ◽  
Nonlinear Effects ◽  
Data Traffic ◽  
Additional Degree ◽  
Mode Division Multiplexing ◽  
Spatial Modes ◽  
Momentum Mode

Internet data traffic capacity is rapidly reaching limits imposed by optical fiber nonlinear effects. Having almost exhausted available degrees of freedom to orthogonally multiplex data, the possibility is now being explored of using spatial modes of fibers to enhance data capacity. We demonstrate the viability of using the orbital angular momentum (OAM) of light to create orthogonal, spatially distinct streams of data-transmitting channels that are multiplexed in a single fiber. Over 1.1 kilometers of a specially designed optical fiber that minimizes mode coupling, we achieved 400-gigabits-per-second data transmission using four angular momentum modes at a single wavelength, and 1.6 terabits per second using two OAM modes over 10 wavelengths. These demonstrations suggest that OAM could provide an additional degree of freedom for data multiplexing in future fiber networks.

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.

Orbital Angular Momentum Mode Division Multiplexing over 1.4 km RCF Fiber

2016 ◽  
Author(s):  
Reza Mirzaei Nejad ◽  
Karen Allahverdyan ◽  
Pravin Vaity ◽  
Siamak Amiralizadeh ◽  
Charles Brunet ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Mode Division Multiplexing ◽  
Momentum Mode
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