scispace - formally typeset
Search or ask a question
Journal ArticleDOI

12-core fiber with one ring structure for extremely large capacity transmission

17 Dec 2012-Optics Express (Optical Society of America)-Vol. 20, Iss: 27, pp 28398-28408
TL;DR: The feature of a multicore fiber with one-ring structure is theoretically analyzed and experimentally demonstrated and the MCF with the number of core larger than seven and the small crosstalk was demonstrated for the first time.
Abstract: The feature of a multicore fiber with one-ring structure is theoretically analyzed and experimentally demonstrated. The one-ring structure overcomes the issues of the hexagonal close-pack structure. The possibility of 10-core fiber with Aeff of 110 μm2 and 12-core fiber with Aeff of 80 μm2 is theoretically presented. The fabricated 12-core fibers based on the simulation results realized Aeff of 80 μm2 and crosstalk less than −40 dB at 1550 nm after 100-km propagation. The MCF with the number of core larger than seven and the small crosstalk was demonstrated for the first time.

Content maybe subject to copyright    Report

Citations
More filters
Journal ArticleDOI
TL;DR: In this article, the authors review recent progress in OAM beam generation/detection, multiplexing/demultiplexing, and its potential applications in different scenarios including free-space optical communications, fiber-optic communications, and RF communications.
Abstract: Orbital angular momentum (OAM), which describes the “phase twist” (helical phase pattern) of light beams, has recently gained interest due to its potential applications in many diverse areas. Particularly promising is the use of OAM for optical communications since: (i) coaxially propagating OAM beams with different azimuthal OAM states are mutually orthogonal, (ii) inter-beam crosstalk can be minimized, and (iii) the beams can be efficiently multiplexed and demultiplexed. As a result, multiple OAM states could be used as different carriers for multiplexing and transmitting multiple data streams, thereby potentially increasing the system capacity. In this paper, we review recent progress in OAM beam generation/detection, multiplexing/demultiplexing, and its potential applications in different scenarios including free-space optical communications, fiber-optic communications, and RF communications. Technical challenges and perspectives of OAM beams are also discussed.

1,398 citations


Cites background from "12-core fiber with one ring structu..."

  • ...High capacity data transmissions in a multicore fiber and in a single-core MMF have been reported [16,17]....

    [...]

Journal ArticleDOI
TL;DR: A 3x1 fiber-based photonic lantern spatial-multiplexer with mode-selectivity greater than 6 dB and transmission loss of less than 0.3 dB is demonstrated, which are to the authors' knowledge the lowest insertion and mode-dependent loss devices.
Abstract: We demonstrate a 3x1 fiber-based photonic lantern spatial-multiplexer with mode-selectivity greater than 6 dB and transmission loss of less than 0.3 dB. The total insertion loss of the mode-selective multiplexers when coupled to a graded-index few-mode fiber was < 2 dB. These mode multiplexers showed mode-dependent loss below 0.5 dB. To our knowledge these are the lowest insertion and mode-dependent loss devices, which are also fully compatible with conventional few-mode fiber technology and broadband operation.

347 citations

Journal ArticleDOI
TL;DR: This paper discusses crosstalk estimation in multicore fibers (MCFs) using coupled-mode theory and coupled-power theory, and the combination of MCF and few-mode fiber (FMF), which is FM-MCF, is a very promising approach to realize space multiplicity over 50.
Abstract: Multicore fibers (MCFs) are expected as a good candidate for overcoming the capacity limit of a current optical communication system. This paper describes the recent progress on the MCFs for space-division multiplexing to be utilized in future large capacity long-distance transmission systems. Tradeoff issue between low crosstalk and high core density in MCFs is presented and prospect of large-space multiplicity of MCFs is discussed.

273 citations

Journal ArticleDOI
TL;DR: The first in-band diode-pumped TDFAs operating in the 2 µm wavelength region are presented and their suitability as high performance amplifiers in potential future telecommunication networks is tested.
Abstract: We present the first in-band diode-pumped TDFAs operating in the 2µm wavelength region and test their suitability as high performance amplifiers in potential future telecommunication networks. We demonstrate amplification over a 240nm wide window in the range 1810 - 2050nm with up to 36dB gain and noise figure as low as 4.5dB.

146 citations

Proceedings ArticleDOI
22 Mar 2015
TL;DR: Recent progress on the MCFs for space-division multiplexing to be utilized in future large capacity long-distance transmission systems are described and prospect of large-space multiplicity of MCFs is discussed.
Abstract: • Due to the limitation of the outer cladding size of MCFs related to their mechanical reliability, the number of cores as well as the core arrangement have to be carefully determined based on the required modulation format and transmission distance. • By introducing heterogeneous core arrangement, further decrement of core-to-core distance is possible with keeping lower crosstalk level compared with the homogeneous MCFs. • The combination of MCF and FMF, which is FM-MCF, is a very promising approach to realize space multiplicity over 50. • Further development on related devices such as Fan-in/Fan-out and amplifier for FM-MCF transmission is highly expected. • Investigation towards cost saving by using MCF transmission system is underway and further development on devise integration is expected for deploying MCFs in the real network.

137 citations

References
More filters
Journal ArticleDOI
TL;DR: In this article, a full vectorial imaginary distance beam propagation method based on a finite element scheme is proposed to investigate the leakage due to a finite number of arrays of air holes in photonic-crystal holey fibers (HFs).
Abstract: A full-vectorial imaginary-distance beam propagation method based on a finite element scheme is newly formulated and is effectively applied to investigating the problem of leakage due to a finite number of arrays of air holes in photonic-crystal holey fibers (HFs). In order to treat arbitrarily shaped air holes and to avoid spurious solutions, a curvilinear edge/nodal hybrid element is introduced. Furthermore, in order to evaluate propagation characteristics of not only bound modes but leaky modes in HFs, an anisotropic perfectly matched layer is also employed as a boundary condition at computational window edges. It is confirmed from numerical results that the propagation loss increases rapidly with increasing wavelength, especially for HFs with one ring of smaller air holes, and that the propagation loss is drastically reduced by adding one more ring of air holes to the cladding region.

559 citations

Journal ArticleDOI
TL;DR: In this paper, an analytical expression of the average power-coupling coefficient (PCC) based on an exponential autocorrelation function is derived, resulting in no need for heavy numerical computations.
Abstract: In order to realize fast and accurate estimation of intercore crosstalk in bent multicore fibers (MCFs), an analytical expression of the average power-coupling coefficient (PCC) based on an exponential autocorrelation function is, for the first time, derived, resulting in no need for heavy numerical computations. It is revealed that, when the bending radius is large and the correlation length is large, the average PCC is inversely proportional to the correlation length and to the square of the propagation constant difference Δβmn between core m and core n, and when the bending radius is small and the correlation length is large, the average PCC is proportional to the bending radius and is independent of the correlation length. When the correlation length is small, on the other hand, the average PCC is proportional to the correlation length and is independent of the bending radius. For homogeneous MCFs (Δβmn = 0) with small bending radius, the average PCC coincides with the mean crosstalk increase per unit length derived from the coupled-mode theory of Hayashi et al. that is proportional to the bending radius. Average crosstalk values calculated by using the analytical expression derived here are in excellent agreement with those of numerical solutions of coupled-power equations, irrespective of the values of bending radius and correlation length.

343 citations

Proceedings ArticleDOI
16 Sep 2012
TL;DR: In this article, the authors demonstrate 1.01-Pb/s transmission over 52 km with the highest aggregate spectral efficiency of 91.4 b/s/Hz by using low-crosstalk one-ring-structured 12-core fiber.
Abstract: (40-Word Limit): We demonstrate 1.01-Pb/s transmission over 52 km with the highest aggregate spectral efficiency of 91.4 b/s/Hz by using low-crosstalk one-ring-structured 12-core fiber. Our multi-core fiber and compact fan-in/fan-out devices are designed to support high-order modulation formats up to 32-QAM in SDM transmission.

323 citations

Journal ArticleDOI
TL;DR: A new multicore fiber having seven single-mode cores arranged in a hexagonal array, exhibiting low crosstalk among the cores and low loss across the C and L bands is described.
Abstract: We describe a new multicore fiber (MCF) having seven single-mode cores arranged in a hexagonal array, exhibiting low crosstalk among the cores and low loss across the C and L bands. We experimentally demonstrate a record transmission capacity of 112 Tb/s over a 76.8-km MCF using space-division multiplexing and dense wavelength-division multiplexing (DWDM). Each core carries 160 107-Gb/s polarization-division multiplexed quadrature phase-shift keying (PDM-QPSK) channels on a 50-GHz grid in the C and L bands, resulting in an aggregate spectral efficiency of 14 b/s/Hz. We further investigate the impact of the inter-core crosstalk on a 107-Gb/s PDM-QPSK signal after transmitting through the center core of the MCF when all the 6 outer cores carry same-wavelength 107-Gb/s signals with equal powers, and discuss the system implications of core-to-core crosstalk on ultra-long-haul transmission.

252 citations

Journal ArticleDOI
TL;DR: This erratum amends typographical errors in Eq.106 in Opt.
Abstract: This erratum amends typographical errors in Eq. (1) and Table 2Table 2Optical properties of each core of the fabricated MCF.Attenuation [dB/km]MFD [µm]Aeff [µm2]λcc [nm]CD [ps/nm/km]D. Slope [ps/nm2/km]Bend loss (R = 5 mm) [dB/turn]PMD [ps/√km]λ [nm]1550162515501550N/A1550155015501625C + LDesignN/AN/A9.8679.6149623.30.0630.0100.021N/ACore 10.1760.1969.8380.2150922.20.0620.0110.0200.132Core 20.1790.1979.7680.2150022.20.0620.0100.0200.134Core 30.1810.2029.8881.3150422.20.0620.0100.0200.044Core 40.1770.1999.8580.8149822.20.0620.0110.0210.093Core 50.1750.1929.7479.0148522.20.0620.0110.0220.205Core 60.1790.2009.8079.9148322.10.0620.0110.0220.116Core 70.1770.1979.7278.2149822.20.0620.0100.0190.106 in Opt. Express 19, 16576 (2011).

244 citations