WDM optical fiber system using Raman amplification

WDM optical network and switching node with pilot tone...

WDM optical network with passive pass-through at each node

WDM optical network with passive pass-through at each node

WDM optical network with passive pass-through at each node

WDM optical network with passive pass-through at each node

WDM optical transmission apparatus

WDM optical transmission system

WDM optical transmission system

WDM ring transmission system

WDM ring transmission system having amplified dropped channels

WDM ring transmission system having two hubs

WDM source for access applications

WDM switching network

WDM system for reduced SBS

WDM system that uses nonlinear temporal gratings

WDM transmission repeater, WDM transmission system and WDM...

WDM transmitter for optical networks using a loop-back spectrall

WDM-based architecture for flexible switch placement in an...

Weighted-sum processing method and apparatus for decoding digita