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Analyzing Ultra-Low Inter-Core Crosstalk Fibers in Band and Space Division Multiplexing EONs

F. Arpanaei, C. Natalino, M. Ranjbar Zefreh, S. Yan, H. Rabbani, Maite Brandt-Pearce, J. P. Fernandez-Palacios, J. M. Rivas-Moscoso, O. Gonzalez de Dios, J. A. Hernandez, A. Sanchez-Macian, D. Larrabeiti, P. Monti

Abstract

In the ultra-low inter-core crosstalk working zone of terrestrial multi-band and multi-core fiber (MCF) elastic optical networks (EONs), the ICXT in all channels of all cores remains below the ICXT threshold of the highest modulation format level (64QAM) for long-haul distances (10000 km). This paper analyzes the performance of this type of MCF in multi-band EONs (MB-EONs). We investigate two band and space division multiplexing (BSDM) scenarios: MCF and a bundle of multi-fiber pairs (BuMFP). Furthermore, the UL-ICXT performance of two MCFs, one with the standard cladding diameter (CD = 125 micrometers) with 4 cores and another with a nonstandard larger CD with 7 cores, is evaluated in the US backbone network. Our findings show that, with careful design of the MCFs physical structure, even with a standard CD, it is possible to achieve UL-ICXT in C, L, and S-band long-haul BSDM EONs. Additionally, the simulation results show that network throughput for BSDM EONs with MCFs in the UL-ICXT regime is up to 12 percent higher than the BuMFP scenario, with capacity increasing linearly with the number of cores.

Analyzing Ultra-Low Inter-Core Crosstalk Fibers in Band and Space Division Multiplexing EONs

Abstract

In the ultra-low inter-core crosstalk working zone of terrestrial multi-band and multi-core fiber (MCF) elastic optical networks (EONs), the ICXT in all channels of all cores remains below the ICXT threshold of the highest modulation format level (64QAM) for long-haul distances (10000 km). This paper analyzes the performance of this type of MCF in multi-band EONs (MB-EONs). We investigate two band and space division multiplexing (BSDM) scenarios: MCF and a bundle of multi-fiber pairs (BuMFP). Furthermore, the UL-ICXT performance of two MCFs, one with the standard cladding diameter (CD = 125 micrometers) with 4 cores and another with a nonstandard larger CD with 7 cores, is evaluated in the US backbone network. Our findings show that, with careful design of the MCFs physical structure, even with a standard CD, it is possible to achieve UL-ICXT in C, L, and S-band long-haul BSDM EONs. Additionally, the simulation results show that network throughput for BSDM EONs with MCFs in the UL-ICXT regime is up to 12 percent higher than the BuMFP scenario, with capacity increasing linearly with the number of cores.

Paper Structure

This paper contains 5 sections, 10 equations, 5 figures, 1 table.

Table of Contents

  1. Introduction
  2. Physical Layer Modeling for band and Space division multiplexing Systems
  3. Simulations Setup, Numerical Results, and Conclusion
  4. TA-MCFs UL-ICXT Analysis
  5. Long-haul networks over ultra-low ICXT TA-MCFs and BuMFPs

Figures (5)

  • Figure 1: Trench-assisted multi-core fiber structure, 7-core fiber (MC07) (top-right) with cladding diameter 225 $\mu m$, and 4-core fiber with cladding diameter 125 $\mu m$.
  • Figure 2: Cumulative path-connection throughput for each connection in USB60.
  • Figure 3: (a) Power coupling coefficient (PCC), (b) mode coupling coefficient (MCC), and (c) inter-core crosstalk (ICXT) versus frequency for different values of the ratio of trench width to core radius, i.e., $w_{\text{tr}}/r_1$ for seven-core MCF (MC07) and four-core MCF (MC04). For the legend of (a), please see (b).
  • Figure 4: Cumulative path-channel throughput (CPCT) for each connection in USB60.
  • Figure 5: Cumulative path-connection throughput for each connection in USB60.