Twisting-Rate-Controlled 125 μm Cladding Randomly Coupled Single-Mode 12-Core Fiber

Sakamoto, Taiji; Aozasa, Shinichi; Mori, Takahide; Wada, Masaki; Yamamoto, Takashi; Nozoe, Saki; Sagae, Yuto; Tsujikawa, Kyozo; Nakajima, Kazuhide

doi:10.1109/jlt.2017.2743205

Cited by 27 publications

(11 citation statements)

References 14 publications

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“…The standard deviation of the DGD στ is square-root proportional to the propagation distance, as already discussed in Sections II and III, so the SMD coefficient is often expressed with a unit of PROCEEDINGS OF THE IEEE 7 ps/km 1/2 , such as the PMD of SMFs. It has been reported that the variation among SMD coefficients measured by different input-output core combinations was negligible for randomly-coupled MCFs [13]. The FA measurement is scalable for MCFs with more than two cores, and the results for MCFs with up to 12 cores have been reported so far [11], [13], [18].…”

Section: B Measurements Of Mode-resolved Characteristics 1) Swept Wav...mentioning

confidence: 91%

“…The transmission experiments with 4C-MCF and 7C-MCF are described in Section VII. For telecom applications, randomly-coupled 12-core fiber with 125-μm cladding (12C-MCF, seventh row in Table 2) demonstrated an SMD less than 10 ps/km 1/2 by twisting the fiber to γ = 4π rad/m during the fabrication process [13].…”

Section: Proceedings Of the Ieeementioning

confidence: 99%

“…6 shows the relationship between the relative core density and the number of cores of reported randomly-coupled MCFs and also plots the results of weakly-coupled MCFs for comparison. Relative core density is defined as the number of cores per unit cross-sectional area, which is normalized by a standard [11], (d) six-core fiber [48], (e) seven-core fiber [24], and (f) 12-core fibers [13]. Right: relative core density versus the number of cores.…”

Section: Proceedings Of the Ieeementioning

confidence: 99%

“…long-haul transmission, which is intentionally designed to have random mode coupling between the multiple cores. By permitting random mode coupling, randomlycoupled MCFs can simultaneously realize ultralow loss and high spatial channel density [11]- [13] compared to other SDM fibers. Random mode coupling is also beneficial for suppressing the accumulation of modal dispersion (MD) [14]- [20], mode-dependent loss (MDL) [20]- [25], and nonlinear impairments [24], [26], [27].…”

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confidence: 99%

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Randomly-Coupled Multi-Core Fiber Technology

et al. 2022

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| Randomly-coupled multi-core fiber (MCF) technology has come to attract lots of attention because of its strong applicability to long-haul transmission systems. Compared with weakly-coupled MCFs with independent cores, it can simultaneously realize higher spatial channel density and ultralow transmission loss using existing ultralow-loss single-mode fiber (SMF) core designs. The strong mode coupling characteristics of randomly-coupled MCFs can provide favorable optical properties, such as suppressed accumulation of modal dispersion (MD), mode-dependent loss (MDL), and nonlinear impairments. This article gives an overview of randomly-coupled MCF technology advancements. First, we describe the classification and design of randomly-coupled MCFs and explain what the randomly-coupled MCFs are and how they are designed. State-of-the-art randomly-coupled MCFs can accommodate four, seven, or 12 cores in a standard 125-µm cladding while achieving ultralow transmission loss and/or small MD, which are very promising for long-haul transmission media. Next, we present the methods to characterize the optical properties of randomly-coupled MCFs and the difference compared to conventional SMF measurements. We also show the low-loss low-MDL connectivity of Manuscript

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Section: B Measurements Of Mode-resolved Characteristics 1) Swept Wav...mentioning

confidence: 91%

Section: Proceedings Of the Ieeementioning

confidence: 99%

Section: Proceedings Of the Ieeementioning

confidence: 99%

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confidence: 99%

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Randomly-Coupled Multi-Core Fiber Technology

et al. 2022

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“…Radio-over-multicore fiber can transmit MIMO signals in SDM, taking advantage of the digital signal processing algorithms already in-place in commerciallyavailable 3GPP LTE-A MIMO equipment [7] [16]. The proposed architecture can be scaled to massive MIMO deployment scenarios considering large core-count MCF are a viable solution as recently reported [17]. In this case, more data streams could be multiplexed over the MCF cores.…”

Section: Introductionmentioning

confidence: 96%

Performance Analysis of Carrier-Aggregated Multiantenna 4 × 4 MIMO LTE-A Fronthaul by Spatial Multiplexing on Multicore Fiber

Morant

Llorente

2018

J. Lightwave Technol.

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In this work we propose and evaluate experimentally the performance of multi-antenna LTE-Advanced (LTE-A) systems implementing MIMO space division multiplexing on multicore fiber, compared to single-antenna SISO transmissions. Fully standard 3GPP LTE-A cellular signals are transmitted with MIMO and Carrier Aggregation in radio-overfiber over a four-core fiber in different configurations. The processing capabilities of in-built 3GPP MIMO processing are evaluated experimentally in two-antenna and four-antenna LTE-A configurations and compared with single-antenna SISO performance. The robustness of 3GPP MIMO processing is analyzed over different optical paths in a 4-core fiber and the optical power margin available between the four optical paths is calculated for each configuration. Finally, the transmission performance of carrier-aggregated LTE-A signals is evaluated in the four-antenna system implementing 4×4 MIMO spatial multiplexing with different carrier separation and center frequency configurations, including regulated cellular frequencies of FDD bands 7 and 20.

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