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US 4,932,745 AGranted
Radiation switching arrangement with moving deflecting element
AssigneeAT&T Bell Laboratories
InventorGreg E. Blonder
Life of this patent
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Abstract
A three or four-port electromagnetic radiation signal beam switching arrangement, such as for simple optical re-routing or for Local Area Network (LAN) loop switching, is achieved with a moving deflecting element having a planar deflecting surface that is constrained to move parallel to itself, into and out of the signal beam. The arrangement can be fabricated in a silicon optical workbench technology.
Claims19
An electromagnetic radiation switching arrangement which comprises:
- (a) a radiation deflecting element (e.g., M, FIG. 2;
- RS, FIG. 18) having a planar deflecting surface;
- (b) moving means (e.g., G;
- FIG. 4) for moving the deflecting element such that the planar deflecting surface thereof can be moved parallel to itself from a first region to a second region and from the second to the first region;
- (c) first, second, and third radiation ports (e.g., P1, P2, P3;
- FIG. 1) that are respectively located such that when the deflecting element is in the first region a radiation signal beam arriving at the switching arrangement at the first port (P1) propagates through the location of the second position and enters into the second port (P2), and such that when the deflecting element is moved by the moving means into the second region the signal beam arriving at the first port (P1) is deflected by the planar surface of the deflecting element into the third port (P3), and
- (d) a substrate (e.g., S;
- FIG. 3) having a major planar surface (e.g., PS, FIG. 3) surface and having first, second, and third waveguide alignment recesses (e.g., FR1, FR2, FR3;
- FIG. 3) therein at the surface thereof which determine respective first, second, and third port positions of the first, second, and third ports, respectively, and having a pair of deflecting element alignment recesses (e.g., SBR1, SBR2;
- FIG. 3) therein at the surface thereof for aligning the deflecting element with respect to the first, second, and third port positions.
7 more elements
Dependencies are inferred from the claim text.