Optical hybrid with 3.times.3 coupling device

Optical input/output module and light-reflecting device

Optical integrated circuit for bidirectional communications and

Optical integrated nodes, and optical communication systems and

Optical inter-ring protection having matched nodes

Optical interconnect architecture

Optical interconnect structures incorporating sets of...

Optical interconnection networks and processes

Optical interface device

Optical interface devices having balanced amplification

Optical interface devices having balanced amplification

Optical interface devices having balanced amplification

Optical interleaver

Optical interleaver

Optical interleaver

Optical interleaver

Optical interleaver/de-interleaver

Optical line monitoring method and an apparatus permitting simul

Optical modulation/multiplexing circuit

Optical module for multi-channel wavelength multiplexing