scholarly journals Two-Layer Erbium-Doped Air-Core Circular Photonic Crystal Fiber Amplifier for Orbital Angular Momentum Mode Division Multiplexing System

Crystals ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 156 ◽  
Author(s):  
Hu Zhang ◽  
Di Han ◽  
Lixia Xi ◽  
Zhuo Zhang ◽  
Xiaoguang Zhang ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Orbital Angular Momentum ◽  
Noise Figure ◽  
Fiber Amplifier ◽  
Crystal Fiber ◽  
Mode Division Multiplexing ◽  
Erbium Doped ◽  
Fabrication Tolerance

Orbital angular momentum (OAM) mode-division multiplexing (MDM) has recently been under intense investigations as a new way to increase the capacity of fiber communication. In this paper, a two-layer Erbium-doped fiber amplifier (EDFA) for an OAM multiplexing system is proposed. The amplifier is based on the circular photonic crystal fiber (C-PCF), which can maintain a stable transmission for 14 OAM modes by a large index difference between the fiber core and the cladding. Further, the two-layer doped region can balance the amplification performance of different modes. The relationship between the performance and the parameters of the amplifier is analyzed numerically to optimize the amplifier design. The optimized amplifier can amplify 18 modes (14 OAM modes) simultaneously over the C-band with a differential mode gain (DMG) lower than 0.1 dB while keeping the modal gain over 23 dB and noise figure below 4 dB. Finally, the fabrication tolerance and feasibility are discussed. The result shows a relatively large fabrication tolerance in the OAM EDFA parameters.

Erbium-doped amplification in circular photonic crystal fiber supporting orbital angular momentum modes

2017 ◽  
Vol 56 (6) ◽  
pp. 1748 ◽  
Author(s):  
Yifan Deng ◽  
Hu Zhang ◽  
Hui Li ◽  
Xianfeng Tang ◽  
Lixia Xi ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Orbital Angular Momentum ◽  
Crystal Fiber ◽  
Erbium Doped

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.

A hollow-core circular photonic crystal fiber mode selective coupler for generating orbital angular momentum modes

2021 ◽  
Vol 64 ◽  
pp. 102543
Author(s):  
Jingxuan Yang ◽  
Hu Zhang ◽  
Xiaoguang Zhang ◽  
Ze Chen ◽  
Lixia Xi ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Orbital Angular Momentum ◽  
Hollow Core ◽  
Crystal Fiber ◽  
Fiber Mode

Ring-based coil structure photonic crystal fiber for transmission of Orbital Angular Momentum with large bandwidth: Outline, investigation and analysis

2020 ◽  
Vol 473 ◽  
pp. 126003 ◽  
Author(s):  
Md. Farhan Israk ◽  
Md. Abdur Razzak ◽  
Kawsar Ahmed ◽  
Md. Mehedi Hassan ◽  
Md. Anowar Kabir ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Orbital Angular Momentum ◽  
Crystal Fiber ◽  
Large Bandwidth ◽  
Coil Structure

Numerical analysis of circular core shaped photonic crystal fiber for orbital angular momentum with efficient transmission

2020 ◽  
Vol 126 (9) ◽  
Author(s):  
Md. Mehedi Hassan ◽  
Md. Anowar Kabir ◽  
Md. Nadim Hossain ◽  
Truong Khang Nguyen ◽  
Bikash Kumar Paul ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Photonic Crystal ◽  
Numerical Analysis ◽  
Photonic Crystal Fiber ◽  
Orbital Angular Momentum ◽  
Crystal Fiber ◽  
Efficient Transmission
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