A multi-orbital-angular-momentum multi-ring micro-structured fiber with ultra-high-density and low-level crosstalk

Chen, Cheng; Zhou, Guiyao; Zhou, Gai; Xu, Min; Hou, Zhipeng; Xia, Changming; Yuan, Jinhui

doi:10.1016/j.optcom.2016.01.009

Cited by 36 publications

(15 citation statements)

References 18 publications

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“…Latest study showed that 32 OAM modes can be supported in a single-ring fiber [28]. By further using the multi-core fiber concept, multi-ring micro-structured fiber was designed to support up to 646 OAM modes in the C band [29]. A laudable goal would be to enhance the index contrast among core, ring, and cladding regions, to further increase the number of supported OAM modes.…”

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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“…Before discussing the above-proposed circular PCF in detail, other PCF structures based OAM fibers should be pointed out. A microstructure ring fiber (MRF) with the same number of air holes in three different rings was presented to satisfy circular symmetry of the OAM optical intensity, as shown in Figure 3a [37,38]. Strictly speaking, this kind of optical fiber belongs to the microstructure fiber rather than PCF.…”

Section: Circular Pcfsmentioning

confidence: 99%

“…Cross section and structure parameters of (a) the microstructure ring fiber (reprinted from [37] by permission from Elsevier), and (b) ring PCF (reprinted with permission from [40]. Copyright 2016 Optical Society of America).…”

Section: Circular Pcfsmentioning

confidence: 99%

The Orbital Angular Momentum Modes Supporting Fibers Based on the Photonic Crystal Fiber Structure

Zhang

et al. 2017

Crystals

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Abstract:The orbital angular momentum (OAM) of light can be another physical dimension that we exploit to make multiplexing in the spatial domain. The design of the OAM mode supporting fiber attracts many attentions in the field of the space division multiplexing (SDM) system. This paper reviews the recent progresses in photonic crystal fiber (PCF) supporting OAM modes, and summarizes why a PCF structure can be used to support stable OAM transmission modes. The emphasis is on the circular PCFs, which possess many excellent features of transmission performance, such as good-quality OAM modes, enough separation of the effective indices, low confinement loss, flat dispersion, a large effective area, and a low nonlinear coefficient. We also compare the transmission properties between the circular PCF and the ring core fiber, as well as the properties between the OAM EDFA based on circular PCF and the OAM EDFA based on the ring core fiber. At last, the challenges and prospects of OAM fibers based on the PCF structure are also discussed.

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“…Therefore, it is of great significance to design a dedicated optical fiber that supports OAM mode transmission in an efficient and stable manner. Correspondingly, the optical fibers that can transmit OAM mode have also been proposed and demonstrated extensively, including single-mode, multi-mode, single-core, and multicore optical fibers [9]- [16]. As one of these innovative designs, the concept of photonic crystal fiber (PCF) was first proposed by J. C. Knight et al [17] in 1996.…”

Section: Introductionmentioning

confidence: 99%

“…The circular photonic crystal fiber supporting OAM modes is first proposed in [24]. In 2016, C. Chen et al proposed a novel multi-orbital-angular-momentum multi-ring microstructured fiber (MOMRMF) which can transmit 34 OAM modes in the wavelength band from 1.52 to 1.56 m [25]. In 2017, H. Zhang et al proposed a ring-shaped PCF made of pure silica material, with a ring-shaped silica region in the middle as the core of OAM mode propagation [26].…”

Section: Introductionmentioning

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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A multi-orbital-angular-momentum multi-ring micro-structured fiber with ultra-high-density and low-level crosstalk

Cited by 36 publications

References 18 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

The Orbital Angular Momentum Modes Supporting Fibers Based on the Photonic Crystal Fiber Structure

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

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