Metro Systems
Power Level Management in Optical Metro Networks
Design without amplification In this example, our goal is to design a basic transparent ring network without amplification and discover the power related issues. Metro networks using ring topology are expected to have more dynamic traffic patterns compared to most long-haul networks. They are also expected to have optically transparent nodes with a minimum number…
Migrating to 10Gbps in Metro Networks
In this example, we will investigate the issues at high data bit rate, particularly 10 Gbps (OC-192) systems in metro area ring networks. At higher bit rates, in addition to loss compensation, we may also need to consider the chromatic dispersion compensation. Different options related to dispersion and initial chirp will be investigated. For this…
Negative Dispersion Fiber for Metro Networks
In this example, we compare two types of fibers, Corning’s MetroCor and SMF-28 fibers for metro network applications. MetroCor Fiber has a negative dispersion, whereas SMF-28 has a positive dispersion in the EDFA bands. Dispersion characteristics of these two fibers are shown in Figure 1. For metro applications, directly modulated lasers (DMLs) are preferred because…
Interchannel Crosstalk in Metro Networks
A particular signal can accumulate cross-talk from different elements and channels over the network. Cross-talk can be reduced by using several techniques such as wavelength dilation or filter cascading. In this example, we will investigate the effect of interchannel cross-talk at ADM to a ring network.
WDM Ring – Wavelength Independent Subscriber Equipment
In this example, we will show realization of a WDM ring network using wavelength independent subscriber equipment to share bandwidth [1]. The metro-ring network we modeled operates with 2 wavelength carriers as shown in Figure 1. In this configuration, several subscribers share the bandwidth. For illustration purposes, the network contains one Network Node (NN) and…
