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

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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Combining spatial domain multiplexing and orbital angular momentum of photon-based multiplexing to increase the bandwidth of optical fiber communication systems

Optical Engineering ◽

10.1117/1.oe.55.6.066124 ◽

2016 ◽

Vol 55 (6) ◽

pp. 066124 ◽

Cited By ~ 4

Author(s):

Syed Murshid ◽

Saud Alanzi ◽

Arnob Hridoy ◽

Gregory L. Lovell ◽

Gurinder Parhar ◽

...

Keyword(s):

Angular Momentum ◽

Optical Fiber ◽

Orbital Angular Momentum ◽

Communication Systems ◽

Optical Fiber Communication ◽

Spatial Domain ◽

Fiber Communication

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Numerical study of photonic crystal fiber supporting 180 orbital angular momentum modes with high mode quality and flat dispersion

Journal of Lightwave Technology ◽

10.1109/jlt.2021.3062503 ◽

2021 ◽

pp. 1-1

Author(s):

Qichang Ma ◽

Ai-Ping Luo ◽

Weiyi Hong

Keyword(s):

Angular Momentum ◽

Photonic Crystal ◽

Photonic Crystal Fiber ◽

Orbital Angular Momentum ◽

Numerical Study ◽

High Mode ◽

Crystal Fiber

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

Photonics ◽

10.3390/photonics8040122 ◽

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.

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