Multimaterial photonic crystal fibers

Markos, Christos; Petersen, Christian

doi:10.1117/12.2290367

Cited by 6 publications

(6 citation statements)

References 31 publications

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“…The large material index-contrast among the cladding, the core, and the ring region enables a large effective-index separation among the HE l+1,1 or EH l−1,1 mode of the same |l| family, which potentially reduces the modal crosstalk and facilitates stable transmission of OAM modes. This structure design and material choice is feasible, as chalcogenide thin-film fibers have been manufactured in practice [30], [31]. According to the As 2 S 3 material loss [32], the optical loss is several times larger than 0.03 dB/m at 1550 nm.…”

Section: Introductionmentioning

confidence: 99%

Air-Core Ring Fiber With >1000 Radially Fundamental OAM Modes Across O, E, S, C, and L Bands

et al. 2020

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In this work, an air-core ring fiber is designed with a record high 1322 orbital angular momentum (OAM) modes at 1550 nm while maintaining radially single-mode condition. Moreover, it can support over 1004 OAM modes across all O, E, S, C, and L bands, exploiting to our knowledge the highest number of OAM modes ever supported in the optical fiber within a wide wavelength range. Simulations show that, across the C and L bands, the fiber with 55-µm air-core radius and 0.45-µm ring width can preserve 3.3 × 10 −3 effective refraction index difference between the two highest-order OAM modes HE 340,1 and EH 271,1. This enables efficient mode separation, and thus achieving stable OAM modes transmission. The effective refractive index differences between the even and odd fiber eigenmodes are also analyzed in the elliptical and bent fibers. We note that higher-order OAM modes are more tolerant to the fiber ellipticity and bending. This ring fiber design has the potential to increase the spectral efficiency and the overall capacity in fiber-based communications system. INDEX TERMS Orbital angular momentum, fiber optics, ring fiber, multiplexing.

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Section: Introductionmentioning

confidence: 99%

Air-Core Ring Fiber With >1000 Radially Fundamental OAM Modes Across O, E, S, C, and L Bands

et al. 2020

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“…From the perspective of fiber manufacturing, the selection of materials and the design of fiber structure are feasible [34], and fibers composed of silica and chalcogenide have been manufactured in practice. The detailed manufacturing process has been described in several papers [35]- [37].…”

Section: Proposed Pcf Structurementioning

confidence: 99%

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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“…The large material index contrast leads to sufficient effective refraction index difference between adjacent modes, which enables mode separation and preserves OAM modes purity across the supercontinuum range [22]. It is feasible to fabricate the designed fiber from the material selection and fiber structure perspectives [23], and fibers composed of silica and chalcogenide have been manufactured in practice [24].…”

Section: Concept Of Sc Generation and Fiber Structurementioning

confidence: 99%

Two-Octave Supercontinuum Generation of High-Order OAM Modes in Air-Core As₂S₃ Ring Fiber

et al. 2020

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In this work, we design and simulate an air-core As2S3 ring fiber for high-order orbital angular momentum (OAM) supercontinuum generation. We show that the chromatic dispersion of the ring fiber can be substantially tailored by proper optimization of the air-core radius. Two-octave supercontinuum carrying OAM17,1 mode, spanning from 1560 to 6250 nm, is obtained by pumping a 50-fs 100-kW secant hyperbolic pulse centered at the wavelength of 3800 nm into the designed fiber with 50-μm air-core radius and 1-μm ring width. We further engineer the chromatic dispersion of some other OAM modes and perform simulations of supercontinuum spectra using different kilowatt-level peak power, which indicates that the fiber we design represents a promising avenue for supercontinuum generation of all the OAMl,1 modes (|l|≤17). The proposed fiber is suitable for the transmission of OAM beams in infrared wavelength range and it could promote the development and application of high-order OAM beams.

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Multimaterial photonic crystal fibers

Cited by 6 publications

References 31 publications

Air-Core Ring Fiber With >1000 Radially Fundamental OAM Modes Across O, E, S, C, and L Bands

Air-Core Ring Fiber With >1000 Radially Fundamental OAM Modes Across O, E, S, C, and L Bands

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

Two-Octave Supercontinuum Generation of High-Order OAM Modes in Air-Core As₂S₃ Ring Fiber

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