Method and apparatus for beam control with optical MEMS beam waveguide
First Claim
1. An apparatus comprising:
- beam control circuitry for controlling deflection of a first cantilevered MEMS optical beam waveguide, comprising;
a plurality of separate deflection electrodes positioned to control deflection of the first cantilevered MEMS optical beam waveguide, the separate deflection electrodes comprising a vertical deflection electrode positioned above the first cantilevered MEMS optical beam waveguide and a plurality of separate lateral deflection electrodes positioned on at least a first side of the first cantilevered MEMS optical beam waveguide; and
a bias circuit connected to provide separately controllable bias voltages to the plurality of separate deflection electrodes, thereby generating controlled, two-dimensional deflection of the first cantilevered MEMS optical beam waveguide.
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Accused Products
Abstract
A high density, low power, high performance information system, method and apparatus are described in which perpendicularly oriented processor and memory die stacks (130, 140, 150, 160, 170) include integrated deflectable MEMS optical beam waveguides (e.g., 190) at each die edge (e.g., 151) to provide optical communications (184) in and between die stacks by using a beam control method and circuit to maintain and adjust alignment over time by calibrating and updating X and Y counter values stored in deflection registers (541-542) to control DAC circuitry (546, 548) which generates and supplies deflection voltages to charging capacitors (551, 552) connected to deflection electrodes (195-197) positioned on and around each MEMS optical beam waveguide (193-194) to provide two-dimensional alignment and controlled feedback to adjust beam alignment and establish optical communication links between die stacks.
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Citations
20 Claims
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1. An apparatus comprising:
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beam control circuitry for controlling deflection of a first cantilevered MEMS optical beam waveguide, comprising; a plurality of separate deflection electrodes positioned to control deflection of the first cantilevered MEMS optical beam waveguide, the separate deflection electrodes comprising a vertical deflection electrode positioned above the first cantilevered MEMS optical beam waveguide and a plurality of separate lateral deflection electrodes positioned on at least a first side of the first cantilevered MEMS optical beam waveguide; and a bias circuit connected to provide separately controllable bias voltages to the plurality of separate deflection electrodes, thereby generating controlled, two-dimensional deflection of the first cantilevered MEMS optical beam waveguide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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providing an integrated circuit die comprising a cantilevered MEMS optical beam and a plurality of deflection electrodes positioned to control deflection of the cantilevered MEMS optical beam; retrieving digital calibration values for compensating for an initial beam deflection in the cantilevered MEMS optical beam; generating deflection bias voltages from the digital calibration values for storage, where each deflection bias voltage is stored on a storage capacitor that is connected to a corresponding one of the plurality of deflection electrodes; and transferring an optical signal along the cantilevered MEMS optical beam which is deflected by electric field forces exerted on the cantilevered MEMS optical beam in response to deflection bias voltages applied to the plurality of deflection electrodes. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A system comprising:
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a first integrated circuit device comprising an optical transmitter, a first cantilevered MEMS optical beam waveguide, and a first plurality of deflection electrodes positioned to control deflection of the first cantilevered MEMS optical beam waveguide; a second integrated circuit device comprising an optical receiver, a second cantilevered MEMS optical beam waveguide, and a second plurality of deflection electrodes positioned to control deflection of the second cantilevered MEMS optical beam waveguide; beam control circuitry for controlling two-dimensional deflection of the first cantilevered MEMS optical beam waveguide into alignment with the second cantilevered MEMS optical beam waveguide by generating a plurality of deflection bias voltages which are coupled to the first and second plurality of deflection electrodes to exert electric field forces on the first and second cantilevered MEMS optical beam waveguides; and a plurality of storage capacitors for storing the deflection bias voltages, where each storage capacitor is connected to a corresponding one of the plurality of deflection electrodes. - View Dependent Claims (18, 19, 20)
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Specification