Design of Homogeneous Trench-Assisted Multi-Core Fibers Based on Analytical Model

Ye, Feihong; Tu, Jiajing; Saitoh, Kunimasa; Takenaga, Katsuhiro; Matsuo, Shoichiro; Takara, H.; Morioka, Toshio

doi:10.1109/jlt.2016.2599187

Cited by 28 publications

(8 citation statements)

References 29 publications

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“…In order to evaluate the effect of the core structure design on switch performance, we calculated the core to core mode coupling coefficients for a variety of trench assisted homogeneous fiber designs by varying both the core refractive index contrast, ∆ 1 , and the core radius, a. The trench depth was set to the maximum achievable by current OVD and VAD manufacturing methods (∆ 2 = −0.70%) [29], since increasing the trench depth does not significantly change the mode field diameter but does reduce the coupling coefficient. It is therefore almost always in our case advantageous to maximize the trench depth.…”

Section: Fiber Designmentioning

confidence: 99%

Design and Analysis of Beam Steering Multicore Fiber Optical Switches

Deakin

Enrico

Parsons

et al. 2019

J. Lightwave Technol.

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The design and performance characteristics of a beam steering optical switch for multicore fibers (MCFs) are reported. Port count, core count, transmission crosstalk or a combination thereof can be optimized for the required application. Decreasing port separation or increasing the maximum steering angle both increase port count, whilst a higher core count or larger mode field diameter increase port capacity or port count respectively at the expense of greater intercore crosstalk. Potential losses from system misalignments and fiber fabrication variations in the core pitch are also estimated. A 50 port switch is possible for a 25 µm core pitch 7 core hexagonal trench assisted MCF (TA-MCF) with a total mean statistical crosstalk on the central core of-25 dB after 1 km, assuming a operational wavelength of 1550 nm and maximum collimator actuator angle of 10 degrees. In contrast, a high capacity 25 µm core pitch 61 core hexagonal TA-MCF can still offer up to a 5 port switch for the same level of crosstalk. For longer link distances,-25 dB crosstalk after 100 km (metro network) is achievable for a 50 port switch using a 35 µm core pitch 7 core TA-MCF. Similar levels of crosstalk can be accomplished at 1000 km (core network) for a 41 port switch using a 35 µm core pitch 7 core TA-MCF.

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Section: Fiber Designmentioning

confidence: 99%

Design and Analysis of Beam Steering Multicore Fiber Optical Switches

Deakin

Enrico

Parsons

et al. 2019

J. Lightwave Technol.

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“…As shown in Fig. 2(a), the total forward-ICSRS power is composed of two parts, which is similar to the Rayleigh scattering [31], [32]. The classical signal in core-i is the source signal to generate ICSRS.…”

Section: Derivation Of the Icsrs Equationsmentioning

confidence: 99%

“…where η is the Raman efficiency, dz is the length of one segment. P ICXT (z) is the power of ICXT at z which is described by [31], [32] P ICXT (z…”

Section: Derivation Of the Icsrs Equationsmentioning

confidence: 99%

Intercore spontaneous Raman scattering impact on quantum key distribution in multicore fber

Cai,

Sun,

2019

Preprint

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We propose a model, for the first time, to quantitatively estimate the intercore spontaneous Raman scattering (ICSRS) in multicore fiber (MCF) based on the characterization of intercore crosstalk (ICXT). Also, we show the propertis of ICSRS through numerical simulations. Then the impact of ICSRS on quantum key distribution (QKD) is evaluated. It is revealed that both the forward-ICSRS and backward-ICSRS will reduce the maximum transmisson distance and the forward-ICSRS will reduce more. However, over the range of metropolitan area networks, quantum signals are affected only when the powers of classical signals are very high in dense wavelength division multiplexing system. Finally, the spontaneous Raman scattering (SRS) generated in single core fiber and the ICSRS generated in MCF are compared. The power variety trend with the transmission distance of SRS is similar to that of ICSRS, though there are subtle differences.

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“…A similar approach consists of placing different cores inside the same fiber resulting in multi-core fibers (MCF). As the core spacing may be in the range of the decay of the single cores' evanescent waves, crosstalk between the different cores may arise [12]. Fiber design of MCF (core number, core spacing, etc.)…”

Section: Space Division Multiplexingmentioning

confidence: 99%

Novel Equalization Techniques for Space Division Multiplexing Based on Stokes Space Update Rule

et al. 2017

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Space division multiplexing (SDM) is a promising technology that aims to overcome the capacity crunch of optical communications. In this paper, we introduce the multiple-input multiple-output (MIMO) Stokes Space Algorithm (SSA) implemented in frequency domain, a novel equalization technique for space division multiplexing (SDM). Although different papers have been published about the SSA and its MIMO implementation, we provide for the first time an analysis of the of the convergence speed and frequency offset of the SSA compared to the least mean square (LMS). SSA algorithm can deal with higher frequency offsets and linewidths than LMS, being suitable for optical communications with higher phase noise. SSA does not need pre-compensation of frequency offset, which can be compensated after equalization without penalties. On the other hand, due to reduced convergence speed, SSA requires longer training sequences than LMS.

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Design of Homogeneous Trench-Assisted Multi-Core Fibers Based on Analytical Model

Cited by 28 publications

References 29 publications

Design and Analysis of Beam Steering Multicore Fiber Optical Switches

Design and Analysis of Beam Steering Multicore Fiber Optical Switches

Intercore spontaneous Raman scattering impact on quantum key distribution in multicore fber

Novel Equalization Techniques for Space Division Multiplexing Based on Stokes Space Update Rule

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