Vestigial Sideband System

1. Vestigial Sideband (VSB) systems offer increased spectral efficiency by filtering the transmitted (or received) spectrum so that one sideband of the modulated optical carrier dominates over the other.
2. However, there are many trade-offs in the design of the optical filters that impact heavily on the benefits of VSB modulation.
3. VPItransmissionMaker™ WDM supports systematic studies of realistic filter designs (e.g. imported thin-film designs) on systems performance over a wide parameter space.
4. Recent work has shown that near-optimum filters can be designed using careful considerations of the nonlinear nature of optical modulation.