Improvements in interconnection systems between circuit boards for signal switching

SCHEDA BREVETTO

Abstract:

An optical interconnection assembly for the mutual connection of a plurality of signal switching circuit boards that may be coupled to a common planar support, backplane, includes: – a planar support frame (F), adapted to receive an ordered arrangement of connectors, which includes a series of first connectors arranged to face corresponding signal transmission ports of said boards, and a series of second connectors arranged to face corresponding signal reception ports of the boards, the support frame (F) being adapted to guide the deployment of an interconnection circuit between corresponding pairs of first and second connectors according to a preset interconnection scheme, wherein the interconnection circuit comprises a plurality of arrangements of aggregated interconnection optical fibers extending along a longitudinal axis of the arrangement; and – controlled deformation guide formations of the optical fiber arrangements, arranged to establish a plurality of non-intersecting coplanar paths of the optical fiber arrangements between corresponding pairs of first and second connectors.

Advantages:

Particularly, according to a preferred embodiment, the fiber optic cables, crimped and associated with corresponding connectors, are mounted on the frame according to a preset interconnection scheme, advantageously, an interconnection scheme computed by an algorithm for calculating an optimal topology, the corresponding path between the connector seats on the frame being guided by deflecting formations or similar curvature guide surfaces ensuring a deformation by curvature of the cable always on the same plane within preset limits of curvature radius so as to avoid damaging the fibers or trajectories anyhow critical for the optical transmission of the signals.

Furthermore, the solution that is the subject of the present invention has the advantage of allowing a more efficient manufacturing process, since the assembling of the interconnection circuits to the backplane board occurs by connection ranks (n connectors at the same time) and not for each single connector anymore, in shorter times.

The use of commercial optical fibers, available in the form of ribbon cables according to the desired number of conductors, and the fact that the fibers end with standardized ferrules, compatible with the technology that is the subject of the invention, makes it possible to reduce the assembling costs for the interconnection assemblies according to the present invention, without the need for a specific machining.

However, this document does not completely deal with the technical problem of implementing a complete interconnection system that has reduced overall dimensions and with an easy maintenance in the case of failures in an optical fiber, and it does not teach how to implement a complete interconnection circuit while developing a plurality of fiber optic ribbons on a backplane board to ensure the mutual interconnection of an ordered arrangement of connectors suitable to receive a plurality of switching boards. [0014] The present invention aims to provide a satisfactory solution to the problems set forth above, while avoiding the prior art drawbacks.

The actual surface that the ribbon takes is complex, and composed of spline curves with a variable radius.

Too low values of such length cause unduly heavy ribbon deformations, with too small curvature radiuses, which could cause optical losses and excitation mode phenomena at undesired frequencies.

Application field:

Light guides;

Structural details of arrangements comprising light guides and other optical elements

 

Technical board:

The present invention relates to the communications field, particularly optical communications, and more particularly it relates to the interconnection systems between signal switching boards.Still more particularly, the invention relates to an optical interconnection assembly for the mutual connection of a plurality of signal switching circuit boards that may be coupled to a common planar support or backplane, to an assembling procedure of an optical interconnection assembly, and an interconnection system comprising a plurality of optical interconnection assemblies between a plurality of signal switching circuit boards.

fassi

 

Patent Title

Improvements in interconnection systems between circuit boards for signal switching

Other Title

Inventor(s)

BASILE VITOFASSI IRENEGUADAGNO GIANLUCA

Published As

Publ. number Pub. date Appl. number
Appl. date
Publ. Stage
EP2818902 20141231 2013EP-0425089
20130626
A1 – Application fo patent of invention
WO2014207657 20141231
2014WO-IB62562
20140624
A1 – Application fo patent of invention

NsRIF

 10276 – Catalogo brevetti CNR

Country of validity

 EP PCT

Ownership

 Consiglio Nazionale delle Ricerche (100%) – ITIA

Contacts

info@ilo-puglia.cnr.it