Broadband and low confinement loss photonic crystal fibers supporting 48 orbital angular momentum modes

Qin, Yi; Jiang, Ping; Yang, Huajun; Niu, Ye; Gui, Fengji

doi:10.1117/12.2521825

Cited by 3 publications

(2 citation statements)

References 19 publications

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“…This finding emphasizes the dynamic interplay between wavelength and ERI. This downward graph is presented in some previously published papers [14][15][16][17][18]. But it is known that frequency is inversely proportional to wavelength for the constant manner of light speed.…”

Section: Effective Refractive Index (Eri) -[N Eff ]mentioning

confidence: 97%

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Fiber design and performance analyses for optical multiplexing: terahertz optical communications

Anowar Kabir,

Paul,

Hossain

et al. 2024

Phys. Scr.

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Multiplexing is the process of combining multiple signals at a single channel. Orbital Angular Momentum (OAM) is one of the main multiplexing techniques for optical data transmissions. This paper examines and suggests a hollow core with four layers of semilunar air-hole-shaped circular photonic crystal fiber (PCF) capable of transmitting terahertz (THz) OAM information-carrying modes. By using the full vector finite element method (FEM), OAM multiplexing is analyzed for the proposed fiber. All the THz OAM-based factors are analyzed at a frequency band ranging from 400 GHz to 800 GHz. For the first time, some important PCF factors such as effective refractive index difference (ERID), dispersion profile (DP), OAM purity, confinement loss (CL), effective mode area (ERA), and numerical aperture (NA) are quantitatively discussed with applications. The proposed design supports 50 OAM modes with ERID up to 10-3. The PCF has a CL of approximately 10- 10 dB/cm and the lowest dispersion profile is 0.3581 ps/THz/cm. Furthermore, the OAM purity is around 97%. Nonetheless, the proposed design can be used in THz-OAM transmission and high optical fiber communications.

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Section: Effective Refractive Index (Eri) -[N Eff ]mentioning

confidence: 97%

“…Besides, they also discussed with difficulty of birefringence for identical groups of OAM states. In 2019, Y Qin et al [18] demonstrated a hollow-centric fiber with a 700 nm bandwidth that supports only 48 OAM modes.…”

Section: Introductionmentioning

confidence: 99%

Fiber design and performance analyses for optical multiplexing: terahertz optical communications

Anowar Kabir,

Paul,

Hossain

et al. 2024

Phys. Scr.

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Terahertz polymer vortex photonic crystal fiber with low confinement loss and flat dispersion for stable transmission of 92 orbital angular momentum modes

Chang,

Meng

2023

Opt Quant Electron

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Hollow Ring-Core Photonic Crystal Fiber With >500 OAM Modes Over 360-nm Communications Bandwidth

Wang

Bao

et al. 2021

IEEE Access

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We propose and design a hollow As2S3 ring-core photonic crystal fiber (PCF) with 514 radially fundamental orbital angular momentum (OAM) modes over 360 nm communications bandwidth across all the O, E, S, C, and L bands. The designed PCF with 40 m-radius air core and 150 nm-width As2S3 ring can support eigenmodes up to HE130,1 and EH128,1. The numerical analysis shows that the designed ring PCF has large effective refractive index contrast, and can transmit up to 874 OAM modes near 1.55 m. Simulation results show that in the C and L bands, the PCF with a hollow-core radius of 40 µm and a ring width of 0.15 µm can retain an 2.5×10 -3 effective refractive index difference between the two highest order OAM modes, which achieves effective mode separation, thereby achieving stable OAM mode transmission. The neff difference between the even and odd fiber eigenmodes and the intra-mode walk-off are also carefully studied under different bending radii. The results show that higher-order OAM modes has better tolerance to the fiber bending, compared with the lower-order modes. The fiber has the potential to support ultra-high capacity OAM mode division multiplexing in the optical fiber communication systems.INDEX TERMS Orbital angular momentum, fiber optics, mode division multiplexing, photonic crystal fiber.

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Broadband and low confinement loss photonic crystal fibers supporting 48 orbital angular momentum modes

Cited by 3 publications

References 19 publications

Fiber design and performance analyses for optical multiplexing: terahertz optical communications

Fiber design and performance analyses for optical multiplexing: terahertz optical communications

Terahertz polymer vortex photonic crystal fiber with low confinement loss and flat dispersion for stable transmission of 92 orbital angular momentum modes

Hollow Ring-Core Photonic Crystal Fiber With >500 OAM Modes Over 360-nm Communications Bandwidth

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