Back to results
US 6,714,339 B2Granted
Optical switch based on light spatial modulators
AssigneeFrance Telecom
InventorsStéphane Gosselin, Philippe Gravey, Nicole Wolffer, Alan Lelah
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeFrance Telecom
InventorsStéphane Gosselin, Philippe Gravey, Nicole Wolffer, Alan Lelah
Estimating the term…
The invention concerns an optical switch for optical beams comprising a series of optical input channels (110) and a series of optical output channels (210), two optical index spatial modulating cells (300, 400) adapted to respectively deflect an optical beam coming out of an input channel and arriving onto an output channel, each series of optical channels (110, 210) being distributed according to two dimensions transverse to the direction of the channels and the index spatial modulating cells (300, 400) being each designed to produce deflections according to said two dimensions. The invention is characterised in that it comprises at least a convergent optical assembly (500) overlapping one first of the two cells (300, 400) and whereof the focus, defined relative to the light path in the switch, is proximate to the plane of the other cell, and the or each convergent optical assembly (500) has its optical center (X) bordering a deflecting cell (300, 400), substantially perpendicular to the center on one side of said cell.
An optical beam router comprising a series of optical input channels and a series of optical output channels, two optical index spatial modulation cells capable of respectively deflecting an optical beam coming out of an input channel and arriving onto an output channel, each series of optical channels being distributed over two dimensions transverse to the direction of the channels and each of the index spatial modulation cells being provided to produce deflections in these two dimensions, characterized in that it includes at least one convergent optical assembly placed overlapping a first of the two cells and whose focus, defined with respect to the light path in the router, is in the vicinity of the plane of the other cell, and in that the or each convergent optical assembly has its optical center on the border of a deflection cell, substantially directly above the center of one side of this cell.
Dependencies are inferred from the claim text.