Optical waveguides – With optical coupler – Switch
Patent
1993-10-04
1994-12-20
Healy, Brian
Optical waveguides
With optical coupler
Switch
385 16, 385 20, 385 40, 385 41, 385 14, 385 42, 385131, 437 15, 437 20, 437 50, 437 51, 437126, 437141, 437192, G02B 612, H01L 2170
Patent
active
053751809
ABSTRACT:
A three or more section reverse .DELTA..beta. directional coupler designed to operate at a number of coupling lengths (L/l) selected from a region of a corresponding switching diagram where the cross and bar state switching curves are approximately parallel to each other and to the vertical axis, the vertical axis defining numbers of coupling lengths, or from a region of corresponding process sensitivity plots for the cross and bar states where the cross and bar state voltage curves are both approximately of zero slope. A number of these directional couplers form an optical switching array and a number of arrays form a system or network for switching optical signals each of which are capable of operation with uniform cross and bar state voltages at low crosstalk levels.
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AT&T Corp.
Healy Brian
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