Mode-division multiplexed transmission of wavelength-division multiplexing signals over a 100-km single-span orbital angular momentum fiber

2020 ◽  
Vol 8 (7) ◽  
pp. 1236 ◽  
Author(s):  
Junwei Zhang ◽  
Junyi Liu ◽  
Lei Shen ◽  
Lei Zhang ◽  
Jie Luo ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Wavelength Division Multiplexing ◽  
Wavelength Division

scholarly journals Amplifying Orbital Angular Momentum Modes in Ring-Core Erbium-Doped Fiber

Research ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-12 ◽  
Author(s):  
Jun Liu ◽  
Shi Chen ◽  
Hongya Wang ◽  
Shuang Zheng ◽  
Long Zhu ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Wavelength Division Multiplexing ◽  
Fiber Amplifier ◽  
Phase Shift Keying ◽  
Fiber Optic Communications ◽  
Wavelength Division ◽  
Erbium Doped ◽  
Shift Keying ◽  
Ring Core

Lots of research efforts have been devoted to increase the transmission capacity in optical communications using orbital angular momentum (OAM) multiplexing. To enable long-haul OAM mode transmission, an in-line OAM fiber amplifier is desired. A ring-core fiber (RCF) is considered to be a preferable design for stable OAM mode propagation in the fiber. Here, we demonstrate an OAM fiber amplifier based on a fabricated ring-core erbium-doped fiber (RC-EDF). We characterize the performance of the RC-EDF-assisted OAM fiber amplifier and demonstrate its use in OAM multiplexing communications with OAM modes carrying quadrature phase-shift keying (QPSK) and quadrature amplitude modulation (QAM) signals. The amplification of two OAM modes over four wavelengths is demonstrated in a data-carrying OAM-division multiplexing and wavelength-division multiplexing system. The obtained results show favorable performance of the RC-EDF-assisted OAM fiber amplifier. These demonstrations may open up new perspectives for long-haul transmission in capacity scaling fiber-optic communications employing OAM modes.

scholarly journals Thermally Tunable Orbital Angular Momentum Mode Generator Based on Dual-Core Photonic Crystal Fibers

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3256
Author(s):  
Lianzhen Zhang ◽  
Xuedian Zhang ◽  
Xuejing Liu ◽  
Jun Zhou ◽  
Na Yang ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Photonic Crystal ◽  
Orbital Angular Momentum ◽  
Wavelength Division Multiplexing ◽  
Fundamental Mode ◽  
Communication Systems ◽  
Energy Conversion Efficiency ◽  
Fiber Communication ◽  
Multi Wavelength ◽  
Dual Core

The combination of mode division multiplexing (MDM) based on orbital angular momentum (OAM) modes with wavelength division multiplexing (WDM) has attracted considerable attention due to its ability to increase optical transmission capacity. However, the switching of the multi-wavelength and multi-order OAM mode in an all-fiber structure has always been a challenge. As a solution, a thermally tunable dual-core photonic crystal fiber (DC-PCF) is proposed to achieve multi-order and multi-wavelength switching of the OAM mode. The results show that the OAM mode with topological charge m = ±1 can be excited with the linear polarization fundamental mode (LPFM) and circular polarization fundamental mode (CPFM). In addition, the device can effectively excite a high-purity ±1st order OAM mode with wavelengths ranging from 1520 to 1575 nm by thermal tuning. The purity of the mode is in excess of 99%, and the energy conversion efficiency (ECE) is above 95%. The proposed design is expected to be applied in all-fiber communication systems combined with MDM and WDM.

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