Loading patent…
AssigneeRadiall Industrie
InventorsHuan B. Yin, Norbert Valade
Estimating the term…
A ferrule of a connector for single-mode optical fibers with polarization maintenance is provided and comprises a tubular outer body which has at its front end a wall that is conical in profile, an inner cylindrical elements inside which an optical fiber can be immobilized, particularly by gluing, said inner element protruding from said end of the outer body, said outer body comprising radial holes for the insertion of devices such as piercers for mechanically centering the inner element in the outer body. The connector includes a socket (18) attached in rotation around said body (1) and means (2) for immobilizing said socket, preferably by gluing, on said body, said socket being, moreover, equipped with an indexing reference (19).
A ferrule of a connector for single-mode optical fibers with polarization maintenance, comprising a tubular outer body which comprises, at its front end a wall having a conical profile, a cylindrical inner element inside which an optical fiber can be immobilized, particularly by gluing, said inner element protruding from said end of the outer body, said outer body comprising radial holes for the insertion of devices such as piercers for mechanically centering the inner element in the outer body, said ferrule characterized by the fact that it comprises a socket (18) attached in rotation about said body (I) and means (20) for immobilizing said socket, preferably by gluing, on said body, said socket being furthermore supplied with an indexing reference (19).
Dependencies are inferred from the claim text.
Drawings are temporarily unavailable. Open the PDF at USPTO
Characterised by form or shape: comprising a keying element on the plug or adapter, e.g. to forbid wrong connection
Of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres: having polarisation-maintaining light guides
Means for centering or aligning the light guide within the ferrule: with auxiliary facilities for movably aligning or adjusting the fibre within…
Dismountable connectors, i.e. comprising plugs: characterised by the method of fastening connecting plugs and sockets, e.g. screw- or nut-lock,…
Term ended 13 May 2007 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
The present invention relates to a ferrule of a connector for single-mode optical fibers with polarization maintenance: that is, optical fibers comprising an elliptical core inside a circular section optical shaft. If necessary, both sides of the elliptical core have constraint elements that exercise an internal asymmetrical constraint on the core or an additional circular core surrounded by an elliptical constraint element.
Such fibers are currently used, for example, in the fabrication of sensors, such as those in high-sensitivity interferometers that require a stable state of linear polarization.
Such fibers are also intended for use in telecommunications systems at very high transmission band.
In the interest of better explaining the invention, we will now describe an application by way of an example that in now way limits the invention and that refers to the attached figures, of which:
FIG. 1 is an internal view of a ferrule produced according to the invention;
FIGS. 2a, 2b, and 2c are internal schematic views of three examples of single-mode optical fibers with polarization maintenance that can be used with the ferrule of FIG. 1; and
The ferrule prepared according to the invention comprises a tubular outer body (1), whose front end has a conically shaped cavity wall (2). This wall (2) is formed on a piece (3) fixed in the body and comprising a flat projection (4) perpendicular to the longitudinal axis of the body (1).
The back end of the body (1) is blocked by an obturation piece((5) equipped with a frontal projection (6), an axial conduit (7) for the passage of an optical fiber and at least one radial hole (8). A metallic tubular cylindrical element (9) is placed inside the body, with the front end (10) of the element protruding from the wall (2).
A single-mode optical fiber with polarization maintenance (11) is placed in an axial conduit provided in the element (9) for this purpose. The fiber (11) is immobilized in the inner element (9), preferably by gluing the end.