Anti-resonant reflecting guidance mechanism in ring-core fibers for the first-order orbital angular momentum modes generation

2021 ◽  
Author(s):  
Jianheng Qiu ◽  
Liang Zhang ◽  
Heming Wei ◽  
Yana Shang ◽  
Jianxiang Wen ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
First Order ◽  
Ring Core

Highly dispersive coupled ring-core fiber for orbital angular momentum modes

2020 ◽  
Vol 117 (19) ◽  
pp. 191101
Author(s):  
Wenpu Geng ◽  
Yiqiao Li ◽  
Yuxi Fang ◽  
Yingning Wang ◽  
Changjing Bao ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Core Fiber ◽  
Ring Core

scholarly journals Ring-Core Photonic Crystal Fiber of Terahertz Orbital Angular Momentum Modes with Excellence Guiding Properties in Optical Fiber Communication

Photonics ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 122
Author(s):  
Fahad Ahmed Al-Zahrani ◽  
Md. Anowar Kabir
Keyword(s):  
Angular Momentum ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Orbital Angular Momentum ◽  
High Capacity ◽  
Optical Fiber Communication ◽  
Fused Silica ◽  
Confinement Loss ◽  
Crystal Fiber ◽  
Ring Core

The orbital angular momentum (OAM) of light is used for increasing the optical communication capacity in the mode division multiplexing (MDM) technique. A novel and simple structure of ring-core photonic crystal fiber (RC-PCF) is proposed in this paper. The ring core is doped by the Schott sulfur difluoride material and the cladding region is composed of fused silica with one layer of well-patterned air-holes. The guiding of Terahertz (THz) OAM beams with 58 OAM modes over 0.70 THz (0.20 THz–0.90 THz) frequency is supported by this proposed RC-PCF. The OAM modes are well-separated for their large refractive index difference above 10−4. The dispersion profile of each mode is varied in the range of 0.23–7.77 ps/THz/cm. The ultra-low confinement loss around 10−9 dB/cm and better mode purity up to 0.932 is achieved by this RC-PCF. For these good properties, the proposed fiber is a promising candidate to be applied in the THz OAM transmission systems with high feasibility and high capacity.

Demonstration of an Orbital Angular Momentum Multiplexer for Ring Core Fiber

2021 ◽  
Author(s):  
Bilas Chowdhury ◽  
Thomas E. Murphy ◽  
Kenneth J. Ritter
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Core Fiber ◽  
Ring Core

scholarly journals Orbital Angular Momentum Optical Amplifier Based on PbS-Doped Ring-Core Fiber

2020 ◽  
Vol 8 ◽  
Author(s):  
Lingmin Xu ◽  
Yana Shang ◽  
Jinhong Yang ◽  
Zhenyi Chen ◽  
Fufei Pang ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Optical Amplifier ◽  
Core Fiber ◽  
Ring Core

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.

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