Hollow Silica Photonic Crystal Fiber Guiding 101 Orbital Angular Momentum Modes Without Phase Distortion in C+L Band

Hong, Seongjin; Lee, Yong Soo; Choi, Hyucksu; Chai, Quan; Li, Yan; Kim, Soeun; Oh, Kyunghwan

doi:10.1109/jlt.2019.2957139

Cited by 32 publications

(13 citation statements)

References 37 publications

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“…Therefore, mode quality serves as a critical parameter for evaluating fiber performance. The mode quality can be evaluated using equation ( 6) [21]:…”

Section: Analysis and Discussionmentioning

confidence: 99%

Improving orbital angular momentum mode transmission with imperfect ring–core fiber

Wang,

Yu,

Deng

et al. 2024

J. Opt.

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Orbital Angular Momentum (OAM), inherent to light beams characterized by helical phase fronts, represents an alternative spatial degree of freedom for photons. In recent years, OAM-based communication has gained significant attention as a potential solution to increase the capacity and spectral efficiency of optical fiber communication systems. In optical fibers, OAM modes can be generated and manipulated by utilizing specialized optical components and techniques. One approach involves using specially designed optical fibers, such as ring-core fibers, which have the capability to support multiple OAM modes. In the manufacturing process, the ring fiber is hardly made perfectly, especially the doped-cores. The introduced defect breaks the symmetry of the ring-core, which has a serious impact on OAM mode transmission. Using a material with a slightly higher refractive index than the cladding to wrap the ring-core is effective in reducing impairment of defects. After numerical simulation, the proposed method improves the walk-off length by a factor of 2-40.

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“…Therefore, mode quality serves as a critical parameter for evaluating fiber performance. The mode quality can be evaluated using equation ( 6) [21]:…”

Section: Analysis and Discussionmentioning

confidence: 99%

Improving orbital angular momentum mode transmission with imperfect ring–core fiber

Wang,

Yu,

Deng

et al. 2024

J. Opt.

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“…Compared to linearly polarized (LP) modes, OAM modes are formed by eigenmodes with potentially lower interactions and thus lower cross talk, which facilitates a transmission system requiring less complex DSP. Many OAM fibers were designed and demonstrated during the past years [241][242][243]. Figure 20(c) shows an OAM fiber that supports 36 OAM states (OAM order from −9 to 9 in two orthogonal states of polarization) [243].…”

Section: Optical Interfaces For Sdm Transmissionmentioning

confidence: 99%

Scaling capacity of fiber-optic transmission systems via silicon photonics

2020

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The tremendous growth of data traffic has spurred a rapid evolution of optical communications for a higher data transmission capacity. Next-generation fiber-optic communication systems will require dramatically increased complexity that cannot be obtained using discrete components. In this context, silicon photonics is quickly maturing. Capable of manipulating electrons and photons on the same platform, this disruptive technology promises to cram more complexity on a single chip, leading to orders-of-magnitude reduction of integrated photonic systems in size, energy, and cost. This paper provides a system perspective and reviews recent progress in silicon photonics probing all dimensions of light to scale the capacity of fiber-optic networks toward terabits-per-second per optical interface and petabits-per-second per transmission link. Firstly, we overview fundamentals and the evolving trends of silicon photonic fabrication process. Then, we focus on recent progress in silicon coherent optical transceivers. Further scaling the system capacity requires multiplexing techniques in all the dimensions of light: wavelength, polarization, and space, for which we have seen impressive demonstrations of on-chip functionalities such as polarization diversity circuits and wavelength- and space-division multiplexers. Despite these advances, large-scale silicon photonic integrated circuits incorporating a variety of active and passive functionalities still face considerable challenges, many of which will eventually be addressed as the technology continues evolving with the entire ecosystem at a fast pace.

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“…In 2019, Hong et al. introduced a novel PCF that is able to guide 101 OAM modes without phase distortion 8 . In 2021, Ma et al.…”

Section: Introductionmentioning

confidence: 99%

“…7 In 2019, Hong et al introduced a novel PCF that is able to guide 101 OAM modes without phase distortion. 8 In 2021, Ma et al proposed a PCF that supports 180 OAM modes and does not have any higher-order radial modes. 9 However, most existing PCFs are designed to be hollow, making it challenging to maintain a perfectly circular shape and complicating the manufacturing process.…”

mentioning

confidence: 99%

Hybrid-structured photonic crystal fiber for propagating vortex beams by multiple-core channels

Wang,

Yu,

et al. 2023

Opt. Eng.

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.Photonic crystal fibers (PCFs) have been extensively studied to enhance communication capacity and spectral efficiency by supporting orbital angular momentum (OAM) modes. However, the structural fragility resulting from the central air hole in PCFs undermines the fiber’s roundness. We introduce a hybrid PCF that replaces the central air hole with a material with a high refractive index. This innovation not only enhances the fiber’s structural strength but also introduces an additional communication channel. Furthermore, this method increases the amount of OAM modes supported for transmission in the ring. Numerical results demonstrate that significant differences in refractive indices exist between adjacent vector modes, with high mode quality (ranging from 74.6% to 97.6%) and a small effective mode area (ranging from 23.5 to 59.5 μm2). The proposed hybrid PCF can transmit 20 OAM modes in the inner core and 54 OAM modes in the outer ring. The spacing between the two layers of air holes has a minimal impact on the effective mode area and mode quality. However, the effective mode area decreases and the mode quality increases with the enlargement of the diameter of air holes. In addition, a decrease in doping concentration results in lower mode quality and a larger effective mode area. Moreover, the proposed hybrid PCF can be employed in OAM-based mode division multiplexing for high-capacity short-range fiber optic communication.

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Hollow Silica Photonic Crystal Fiber Guiding 101 Orbital Angular Momentum Modes Without Phase Distortion in C+L Band

Cited by 32 publications

References 37 publications

Improving orbital angular momentum mode transmission with imperfect ring–core fiber

Improving orbital angular momentum mode transmission with imperfect ring–core fiber

Scaling capacity of fiber-optic transmission systems via silicon photonics

Hybrid-structured photonic crystal fiber for propagating vortex beams by multiple-core channels

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