Optical waveguides – With optical coupler – Switch
Patent
1996-03-05
1997-11-11
Healy, Brian
Optical waveguides
With optical coupler
Switch
385 15, 385 24, 385 42, 385 27, 385122, G02B 626
Patent
active
056872607
ABSTRACT:
The invention relates to an optical switch which is switchable by means of light. The switch includes a directional coupler having four gates, the first gate of which forms part of an input of the switch for receiving an optical data pulse series, the second gate forms part of an output of the switch and the third gate and the fourth gate are interconnected by means of a waveguide structure. This waveguide has a non-linear optical portion at an asymmetrical position in the waveguide. A control pulse signal is also introduced into the waveguide via the first gate of the directional coupler. The waveguide is asymmetrical for the data pulse series and symmetrical for the control pulse signal.
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Sokoloff et al., "A Terahertz Optical Asymmetric Demultiplexer (TOAD)", IEEE Photonics Technology Letters, vol. 5, No. 7, Jul. 1993. pp. 787-790.
Healy Brian
Marion Michael E.
U.S. Philips Corporation
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