Optical Dynamic Core Networks - Sponsored Whitepaper

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Design, Implementation and Engineering Considerations

Introduction Developments in optical component technologies, specifically the Reconfigurable Optical Add/Drop Multiplexer (ROADM) used for wavelength steering, have enabled more complex reconfigurable optical networks. Traditional Dense Wavelength Division Multiplexing B (DWDM) networks, typically based on banded filter architectures, provide static routes in which the majority of wavelength lightpaths A generally share a common “A” and “Z” location. The design of these networks can be done fairly easily and allow for the optimization P of known lightpaths from day one, but they do not provide flexible reconfiguration and present significant network design challenges when new or unforeseen A-to-Z lightpaths are required.

Multi-degree ROADM technology addresses DWDM shortcomings by enabling networks to be designed with an optical dynamic core, offering network flexibility and reconfigurable lightpaths. The goal in the design of these networks is to provide true any- to-any lightpaths for all data rates, up to and including 40 Gbps. To achieve the full benefits of an optical dynamic core, various engineering considerations must be taken into account during network design.

This paper discusses the issues and solutions associated with the design and implementation of multi-degree ROADM-based ring and mesh optical networks. It will outline the steps in the design of a complex mesh network using a combination of two-degree and multi-degree ROADMs, Erbium Doped Fiber Amplifiers (EDFA), Raman amplifiers, Polarization Mode Dispersion (PMD) compensators and chromatic dispersion compensators. Compensation methods used to combat the effects of chromatic dispersion, PMD and Amplified Spontaneous Emission (ASE) noise will also be covered in reference to both 10 Gbps and 40 Gbps systems.

Kim Papakos Senior Product Planner Mark Boduch Senior Principal Engineer Julia Larikova Staff Engineer
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