A Universal Specification for Multicore Fiber Crosstalk

Gené, Joan M.; Winzer, Peter J.

doi:10.1109/lpt.2019.2903717

Cited by 34 publications

(14 citation statements)

References 16 publications

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“…The relative strength of the two can be tentatively estimated by comparing the results obtained when the NANF is in the loop and when the NANF is replaced by a VOA with same loss. Matching data with a simple model for the loop, which uses for the NANF the phenomenological crosstalk description [15], we tentatively estimate that the disturbance induced by the NANF is about three times larger at 80 recirculations than the accumulated ASE noise. The nonlinearity of the PSCF, estimated using the GN-model, is a further 13 dB below ASE and hence negligible.…”

Section: A Comparison With the Previous Experiments [11]mentioning

confidence: 72%

Transmission of 61 C-Band Channels Over Record Distance of Hollow-Core-Fiber With L-Band Interferers

Nespola

Straullu

Bradley

et al. 2021

J. Lightwave Technol.

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We report on two recirculating loop transmission experiments over a hollow-core fiber of the Nested-Antiresonant Nodeless type (NANF). We transmitted 61 channels in C-band at 32 GBaud, with either PM-QPSK or PM-16QAM modulation. In addition, 61 L-band interferers co-propagated in the NANF at all times, though they were not recirculated in the loop, to check for the presence of possible crosstalk effects between C and L-band in the NANF. The loop comprised the longest NANF transmission line yet constructed (7.72 km), as well as 55 km of pure-silicacore fiber (PSCF) needed to provide enough signal buffering and EDFA stabilization for the loop. The launch power into the PSCF was low enough to avoid generation of any significant non-linear noise. Using PM-QPSK, we achieved a record 618 km transmission in NANF (80 recirculations), at an overall average GMI of 3.44 bits/symb. Using PM-16QAM, we achieved a record 201 km transmission, at an overall average GMI of 7 bits/symb. We saw no adverse effect from the presence of L-band interferers in the NANF. If progress in the reduction of NANF loss and intermodal interference continues at the rate of the last few years, these hollow-core fibers might become a promising alternative in the quest for next-generation higher-throughput fibers, given their theoretical potential of achieving low loss and ultra-low nonlinearity over ultra-wide bandwidths, ideally bringing about a many-fold increase in throughput per fiber.

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Section: A Comparison With the Previous Experiments [11]mentioning

confidence: 72%

Transmission of 61 C-Band Channels Over Record Distance of Hollow-Core-Fiber With L-Band Interferers

Nespola

Straullu

Bradley

et al. 2021

J. Lightwave Technol.

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“…The XT is 25 dB lower than the lowest XT of the reference points, −67 dB/km. In [34], a universal specification of IC-XT per unit length, around −60 dB/km is proposed which is suitable for different systems from metropolitan (∼100 km) to trans-pacific (∼10 000 km). Our 6-core fibres all satisfy this universal specification including the results of eff -optimization of which the highest overall XT is In eff -optimization, the upper limits of eff were explored without XT constraint.…”

Section: Power Coupling Coefficientmentioning

confidence: 99%

Optimization of 125-$\mu$m Heterogeneous Multi-Core Fibre Design Using Artificial Intelligence

Ottino

Ferreira

et al. 2022

IEEE J. Select. Topics Quantum Electron.

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We propose an automated heterogeneous trench-assisted multi-core fibre (MCF) design method. This method uses neural networks to speed up coating loss estimation by ∼ 10 6 times and using particle swarm optimization (PSO) algorithm to explore the optimal MCF design under various objectives and properties constraints. The latter reduces the permutation evaluations by ten orders of magnitude compared with the brute force method. The artificial intelligence (AI)-based method is used to design MCFs on two objectives: minimizing crosstalk (XT) and maximizing effective mode area ( eff ). By optimizing XT with different eff and cutoff wavelength constraints combinations for 6-core fibres, we achieved -92.1 dB/km ultra-low XT for C+L band fibre and -64 dB/km for E+S+C+L-band fibre. Meanwhile, we explored the upper limit of eff given different bandwidth constraints resulting in a 6.82 relative core multiplicity factor. We performed capacity analysis of fibres for two transmission lengths. It is shown that bandwidth is the dominant factor while the increase brought by eff and the penalty caused by XT are relevantly small. Our fibres exceed the cutoff-limited capacity of the 7-core fibre in literature by 35.1% and 84.8% for 1200 km and 6000 km transmission respectively.

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“…Modern coherent optical communication systems have MCF crosstalk requirements regardless of transmission distance. Tolerable crosstalk has penalties for capacity, reach, universality transponder installation, and system link implementation [48,49].…”

Section: Cross Talkmentioning

confidence: 99%

Multi-core Fiber Technology

Anis¹,

Ali²

2021

Fiber Optics - Technology and Applications

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Traditional single-mode fiber capacity issues will be mitigated by using space-division multiplexing in future 5G, IoT, and M2M networks. Multi-core fibers are expected as a good candidate for overcoming the capacity limit of a current optical communication system. This chapter describes the recent progress on the Multi-core fibers technology for the application of high capacity space-division multiplexing to be utilized for long-distance transmission systems. Further various optical approaches that enable key functions are discussed, including SDM MUX/DeMUX, switches, transceivers to enable next generation optical network. Moreover, issues like crosstalk, non-linearity is a potential limitation on the achievable data-rates in optical fiber transmission systems using multi-core fibers will be discussed.

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A Universal Specification for Multicore Fiber Crosstalk

Cited by 34 publications

References 16 publications

Transmission of 61 C-Band Channels Over Record Distance of Hollow-Core-Fiber With L-Band Interferers

Transmission of 61 C-Band Channels Over Record Distance of Hollow-Core-Fiber With L-Band Interferers

Optimization of 125-$\mu$m Heterogeneous Multi-Core Fibre Design Using Artificial Intelligence

Multi-core Fiber Technology

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