Transmission of Orbital Angular Momentum and Cylindrical Vector Beams in a Large-Bandwidth Annular Core Photonic Crystal Fiber

The stable propagation of orbital angular momentum and cylindrical vector beams in a newly designed annular core photonic crystal fiber (AC-PCF) tailored for the broadband single-radial order beam transmission (within the so-called “endlessly mono-radial” guiding regime) is demonstrated for the first time. It is shown that the vector-vortex beams can maintain high mode purities above 18 dB after propagation in the fiber under test over all of the wavelength range from 805 to 845 nm (over 17 THz bandwidth) investigated with the help of a tunable laser and an S-plate for the generation of singular beams in free space. Our results confirm that the AC-PCF is a promising design for the broadband transmission of vector-vortex beams that have potential applications in space-division multiplexing, quantum communications, optical sensing and trapping.

Download Full-text

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

Optics Communications ◽

10.1016/j.optcom.2020.126003 ◽

2020 ◽

Vol 473 ◽

pp. 126003 ◽

Cited By ~ 2

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

Download Full-text

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

Download Full-text

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.

Download Full-text