Multiplexer/demultiplexer for WDM optical signals

Multireflector fiber optic filter apparatus and method

MxO multiplex demultiplex component

N-port reconfigurable DWDM multiplexer and demultiplexer

N.times.N wavelength router, optical routing method and associat

Narrowband twisted optical fiber wavelength division multiplexer

Network for distributing signals to a plurality of users

Network with thermally induced waveguide

Node device of optical ring network

Optic fibre multiplexer-demultiplexer with flattened response

Optical 2-fiber ring network

Optical add and drop multiplexer using ring resonators

Optical add-drop filter

Optical ADD-DROP module which can be expanded modularly

Optical add-drop multiplexer

Optical add-drop multiplexer having an interferometer structure

Optical add-drop multiplexers for WDM optical communication syst

Optical add-drop multiplexing apparatus

Optical add/drop module

Optical add/drop module