Generation and excitation of different orbital angular momentum states in a tunable microstructure optical fiber

Huang, Wei; Liu, Yange; Wang, Zhi; Zhang, Wanchen; Luo, Mingming; Liu, Xiaoqi; Guo, Junqi; Liu, Bo; Lin, Lie

doi:10.1364/oe.23.033741

Cited by 24 publications

(13 citation statements)

References 26 publications

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“…For long-distance transmission of OAM states, special micro-structured fibers, such as vertex fibers or multi-ring fibers, have been deployed for its low mode distortion and low crosstalk 20–22 . However, so far only few works have been reported for OAM states conversion and multicasting using fibers 23 , which could indeed provide integrated solution and make the application of OAM states more practical in optical fiber transmission systems.…”

Section: Introductionmentioning

confidence: 99%

Orbital angular momentum (OAM) conversion and multicasting using N-core supermode fiber

Shao

Yan

Luo

et al. 2017

Sci Rep

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We propose and numerically demonstrate a conversion and multicasting scheme of orbital angular momentum (OAM) states by using N-core supermode fiber (NCSF), where the topological charges of converted OAM states mainly depend on the injected OAM state and the number of fiber cores. The conversion efficiency (CE) of the converted OAM states could be optimized by properly designing the fiber structure. Take N = 6 as an example, ~37% CE could be achieved at telecom bands. Moreover, even for a fabricated NCSF, the CE could be dynamically changed by stretching the fiber or by adjusting the refractive index of the fiber cores through external control of the environmental conditions. Meanwhile, OAM multicasting could also be realized in the designed NCSF. The crosstalk between the multicasted OAM channels and their neighboring ones are assessed to be less than −30 dB. The proposed fiber-based OAM conversion and multicasting system is compatible with the existing optical fiber communication systems, showing potential applications in the future.

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Section: Introductionmentioning

confidence: 99%

Orbital angular momentum (OAM) conversion and multicasting using N-core supermode fiber

Shao

Yan

Luo

et al. 2017

Sci Rep

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“…It is more convenient if we can use a special fiber device to directly couple the fundamental mode to the OAM mode we want. There have been some reported works generating OAM modes directly through a special micro-structured optical fiber design [49][50][51].…”

Section: Micro-structured Optical Fiber-based Oam Generation Systemmentioning

confidence: 99%

“…Compared with spatial generating methods, fiber generating methods have shown their certain advantages. A converter applied in fiber methods can be fiber gratings [31][32][33][34][35][36][37][38][39][40][41][42][43][44], mode selective couplers [45][46][47][48], and microstructure optical fibers [49][50][51] and photonic lanterns [52,53]. As a cylindrical waveguide, fiber is a natural beam shaper for OAM beams.…”

Section: Introductionmentioning

confidence: 99%

Generation of Orbital Angular Momentum Modes Using Fiber Systems

et al. 2019

Self Cite

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Orbital angular momentum (OAM) beams, characterized by the helical phase wavefront, have received significant interest in various areas of study. There are many methods to generate OAM beams, which can be roughly divided into two types: spatial methods and fiber methods. As a natural shaper of OAM beams, the fibers exhibit unique merits, namely, miniaturization and a low insertion loss. In this paper, we review the recent advances in fiber OAM mode generation systems, in both the interior and exterior of the beams. We introduce the basic concepts of fiber modes and the generation and detection theories of OAM modes. In addition, fiber systems based on different nuclear devices are introduced, including the long-period fiber grating, the mode-selective coupler, microstructural optical fiber, and the photonic lantern. Finally, the key challenges and prospects for fiber OAM mode systems are discussed.

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“…Moreover, Fang et al simulated the flexible generation of HO-OAM modes by using helical long-period fiber gratings [20][21] . Furthermore, theo-retical methods for generating HO-OAM modes were proposed by phase-matching coupling between different vector modes [22][23][24] . In addition, integrated photonics-based methods have been implemented for OAM multiplexing and generation, which realize relatively compact systems [25][26][27][28][29][30][31] .…”

Section: Introductionmentioning

confidence: 99%

Fiber-based mode converter for generating optical vortex beams

Chen¹,

Wang²,

Zhang³

et al. 2018

OEA

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In this work, an all-fiber-based mode converter for generating orbital angular momentum (OAM) beams is proposed and numerically investigated. Its structure is constructed by cascading a mode selective coupler (MSC) and an inner elliptical cladding fiber (IECF). OAM modes refer to a combination of two orthogonal LP lm modes with a phase difference of ±π/2. By adjusting the parameters and controlling the splicing angle of MSC and IECF appropriately, higher-order OAM modes with topological charges of l = ±1, ±2, ±3 can be obtained with the injection of the fundamental mode LP 01 , resulting in a mode-conversion efficiency of almost 100%. This achievement may pave the way towards the realization of a compact, all-fiber, and high-efficiency device for increasing the transmission capacity and spectral efficiency in optical communication systems with OAM mode multiplexing.

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Generation and excitation of different orbital angular momentum states in a tunable microstructure optical fiber

Cited by 24 publications

References 26 publications

Orbital angular momentum (OAM) conversion and multicasting using N-core supermode fiber

Orbital angular momentum (OAM) conversion and multicasting using N-core supermode fiber

Generation of Orbital Angular Momentum Modes Using Fiber Systems

Fiber-based mode converter for generating optical vortex beams

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