Prototype system for real-time IM/DD MDM transmission based on multiple-ring-core FMF and degenerate-mode-selective reception

Gao, Yuyang; Ge, Dawei; Cui, Jian; Jia, Junchi; He, Yongqi; Chen, Zhangyuan; Li, Guifang; Li, Juhao

doi:10.1364/oe.376672

Cited by 16 publications

(2 citation statements)

References 10 publications

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“…[6][7][8][9] In the field of communications, substantial research efforts have been focused on achieving orthogonal eigenmodes while concurrently mitigating cross talk. [10][11][12][13][14] Conversely, within the domain of structured optical fields, the aim revolves around accessing a wide array of optical states within space and effecting seamless transitions between these distinct optical configurations. Mode-division multiplexers (MDMUXs) emerge as a solution satisfying both of these requirements.…”

Section: Introductionmentioning

confidence: 99%

“…However, FBT-based MSCs have traditionally encountered a persistent issue of elevated insertion losses, frequently surpassing several decibels 11 – 13 The insertion loss of an MDMUX that multiplexes three mode groups is 0.3 dB for LP01 mode, 1.5 dB for LP11 mode, and 3.2 dB for LP21 mode excitation at the wavelength of 1550 nm 14 . Meanwhile, cascaded MSC mode multiplexers founded upon SP demonstrate enhanced insertion loss performance 30 …”

Section: Introductionmentioning

confidence: 99%

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Ultra-low-loss all-fiber orbital angular momentum mode-division multiplexer based on cascaded fused-biconical mode selective couplers

Guo,

Liu,

Chen

et al. 2024

Adv. Photon. Nexus

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.Mode-division multiplexers (MDMUXs) play a pivotal role in enabling the manipulation of an arbitrary optical state within few-mode fibers, offering extensive utility in the fields of mode-division multiplexing and structured optical field engineering. The exploration of MDMUXs employing cascaded resonant couplers has garnered significant attention owing to their scalability, exceptional integration capabilities, and the anticipated low insertion loss. In this work, we present the successful realization of high-quality orbital angular momentum MDMUX corresponding to topological charges 0, ±1, and ±2, achieved through the utilization of cascaded fused-biconical tapered couplers. Notably, the measured insertion losses at 1550 nm exhibit remarkable minimal values: 0.31, 0.10, and 0.64 dB, respectively. Furthermore, the 80% efficiency bandwidths exceed 106, 174, and 174 nm for these respective modes. The MDMUX is composed of precision-manufactured high-quality mode selective couplers (MSCs). Utilizing a proposed supermode propagation method based on mode composition analysis, we precisely describe the operational characteristics of MSCs. Building upon this comprehensive understanding, we embark on a pioneering analysis elucidating the influence of MSC cascading order on the performance of MDMUXs. Our theoretical investigation substantiates that when constructing MDMUXs, MSCs should adhere to a specific cascading sequence.

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