An optical switch with a waveguide used as a detector is disclosed. The switch can be used
for circuit or packet switching. The waveguide is used to tap off a fraction of the input signal …

There exist situations in optical network Switching when it would be desirable to have a
router having 2 input ports and multiple output ports rather than the usual 1 input port and …

An optical router capable of efficiently allocating optimum optical paths to optical signals at
optimum timings is provided in accordance with the present invention. The optical router is …

An optical waveguide cross-point switch capable of full broadcast and strictly non-blocking
operation. The device has a matrix of a plurality of input waveguides and a plurality of output …

power on each optical channel is provided, wavelength-de pendent losses introduced by all
the devices in the switch including the WDM devices at the output of the switch are …

The present invention relates to an optical logical AND gate comprising an erbium doped
waveguide which is attenuating at a signal wavelength and responsive to pump light energy …

(1) Field of the Invention The present invention relates to an optical Switching System for
routing optical Signals that contain address infor mation indicating destinations of the optical …

The subject of the present invention is an optical switching system for switching a very large
number of channels and possessing switching characteristics com-40 parable or better than …

BACKGROUND OF THE INVENTION The advent of gigabit-per-second packet networks has
focussed the attention of optical network system designers on the need to provide selected …

An optical data stream is converted to electrical signals which are applied to a time-slot
interchanger. The time-slot interchanger recorders the packets or cells of the data stream to …