Scalable and modular automated fiber optic cross-connect systems
This invention discloses patch-panel systems for organized configuration management of large numbers of fiber optic interconnection strands, wherein each strand transmits high bandwidth signals between devices. In particular, a system for the programmable interconnection of large numbers of optical fiber strands is provided, whereby strands connecting a two-dimensional array of connectors are mapped in an ordered and rule based fashion into a one-dimensional array with substantially straight lines strands there between. The braid of fiber optic strands is partitioned into multiple independent, non-interfering zones or subbraids. The separation into subbraids provides spatial clearance for one or more robotic grippers to enter the free volume substantially adjacent to the two-dimensional array of connectors and to mechanically reconfigure one or more optical fiber strands without interrupting or entangling other fiber optic strands.
1. A patch panel system of spatially reconfigurable, cross-connected strands for carrying a multiplicity of individual signals across an intervening gap between first and second planes with the strands defining a geometric braid within the gap, while the strands are individually held linear within the gap by tensioning means adjacent thereto, the geometric braid having a number of physically separate subbraids extending from a common extended, linear origin in a first plane and separating out at diverging angles to a second plane comprised of a multiplicity of columns of parallel, spaced apart terminals, comprising:
a multiplicity of individual strands within each subbraid, said strands being disposed in an ordered hierarchical relation and topologically equivalent to an ordered stack of separable layers, each strand residing within a layer of the stack and ordered such that all layers of the stack to one side of the individual layer are characterized by a higher relation, and all layers on the opposite side are characterized by a lower relation,
whereby any individual strand of a first subbraid may pass through a second subbraid in a knot-free fashion by subdividing the second subbraid such that the individual strand passes through the stack of layers at a location separating those layers in lower relation and those layers in higher relation.
2. A system of cross-connected strands in accordance with claim 1 , wherein each strand corresponds to an optical waveguide such as an optical fiber.
3. A system of cross-connected strands in accordance with claim 2 , wherein each optical fiber is single mode and/or multimode bend insensitive fiber exhibiting less than 0.25 dB loss for a 360 degree bend of 10 mm diameter.
4. A system of cross-connected strands in accordance with claim 1 , wherein the outer diameter of strands is less than or equal to 0.5 mm and typically 0.25 mm.
5. A system of cross-connected strands in accordance with claim 4 , wherein strands in the first plane have a center-to-center spacing of 1.5 mm or less.
6. A system of cross-connected strands in accordance with claim 2 , wherein each strand is terminated in the vicinity of the second plane with a polished fiber optic connector such as the standard LC, SC, MU or MPO connector.
7. A system of cross-connected strands in accordance with claim 1 , wherein each strand corresponds to a radio frequency waveguide such as a coaxial cable.
8. A system of cross-connected strands in accordance with claim 1 , wherein there are 10 to 48 subbraids per braid, and up to 100 strands per subbraid.
9. A system of cross-connected strands in accordance with claim 1 , wherein the strands comprising each subbraid do not physically contact nor entangle other strands in adjacent braids.
10. A system of cross-connected strands in accordance with claim 1 , wherein the diverging angles are less than 180 degrees.