Abstract:
An assembly of a mounting support and an optical fibre connector adaptor (20) mounted on the support, wherein the adaptor has a connector-receiving axis and at least one lateral (to the said axis) mounting projection (25) on at least a first one of its sides, and the mounting support comprises wall members (not necessarily flat or continuous) upstanding from the support on both sides of the saidadaptor, which wall members on at least one side of the adaptor define mounting slots adapted to receive the said mounting projections of the adaptor, and wherein the slots are formed topermit movement of the adaptor between at least a first position in which the adaptor is supported with its said axis at an acute angle to the support, and a working position in which the adaptor is supported with its said axis lying substantially parallel to the support, and wherein the wall members define, in at least one of the said slots, at least one shoulder (30) on which one of the mounting projections (25) of the adaptor can be supported, and at least one resilient portion (35) of the wall member is arranged to retain that mounting projection removably on the said shoulder.
Abstract:
A microstructured fiber or photonic crystal fiber is described having a doped solid core region and a cladding region, holes being provided in the cladding region, the fiber having a low hybrid splice loss to conventional fiber as well as being able to be tightly bent due to the microstructured cladding. The cladding region can contain a plurality of holes surrounding and distanced from the core. These holes are preferably located symmetrically around the core and extend longitudinally along the length of fiber. The holes may be two or more D-shaped holes or truncated D-shaped holes arranged symmetrically around the care. In other embodiments, the holes comprise hole structures arranged symmetrically around the core in a ring. The holes may be arranged having the inner side facing the core formed from arcs of a circle, e.g. equal arcs of a circle. Between the arcs circular holes may be provided called capillaries, i.e. smaller holes. According to the present invention, any number of holes may surround the core, preferably three or more. The fiber has low loss at small bending radii.
Abstract:
An enclosure (10) for optical fibre cable or patch cord connections comprising a casing (20), an optical connection adaptor (80), a holder (90) for the connection adaptor, and cable or cord strain relief means attachable to the casing, wherein the holder is integral with or secured or securable within the casing and allows limited axial movement of the adaptor inside the holder over an axial distance (α) greater than the distance of flexural distortion of the casing which is caused at the point of strain relief attachment by manual traction on the cable or cord outside the casing.
Abstract:
The present invention provides an optical fibre connection device comprising a part (103) of a screw-threadless multi-part (101, 103) optical fibre cable connector (100), the multi-parts (101, 103) of the connector (100) being inter-connectable, the part (103) comprising a body (102), the body (102) comprising : an optical fibre cable connection end (105) for connection with an optical fibre cable (106); a part connection end (104) for connection with another part (101) of the multi-part optical fibre cable connector (100); and one or more formations (113) adapted to co-operate with a retainer (213, 313) in a mounting (200, 300) for the connector (100), the mounting (200, 300) used to retain the optical fibre cable (106) and the connector (100) when the optical fibre cable (106) is connected to the optical fibre cable connection end (105) of the body (102), the formations (113) adapted to co-operate with the mounting retainer (213, 313) to resist rotational and/or axial movement of the connector (100) when the connector (100) is assembled with an optical fibre cable (106) and the other parts (103, 101) of the connector (100) and mounted in the mounting (200, 300).
Abstract:
A cross-connect device and method of operating the same is described having a plurality of N first transmission path input/output terminals and a plurality of M second transmission path input/output terminals, the device having a remotely actuated cross-connection arrangement. This arrangement includes at least three stages, each stage being implemented as a sparse crossbar: a first sparse cross-bar arrangement having first connection lines connected to the plurality of first transmission path input/output terminals and second connection lines connected to the plurality of second transmission path input/output terminals and a plurality of first switch elements for connecting selective ones of the first connection lines to selective ones of the second connection lines, a second sparse cross-bar arrangement having third connection lines connected to at least some of the first connection lines, and fourth connection lines and a plurality of second switch elements for connecting selective ones of the third connection lines to selective ones of the fourth connection lines, and at least a third sparse cross-bar arrangement having fifth connection lines connected to at least some of the fourth connection lines, and sixth connection lines and a plurality of third switch elements for connecting selective ones of the fifth connection lines to selective one of the sixth connection lines. The device has selectable connecting paths between the sixth connection lines and at least some of the second transmission path input/output terminals, whereby the total number of switching elements for the at least first to third sparse cross-bar arrangements is less than N x M.
Abstract:
A fiber pigtailed network monitoring module incorporating an optical printed circuit board on which a signal-transferring connection is remotely actuated between electronic components mounted on the board and active and/or passive optical devices mounted on the board to generate remotely readable monitoring signals.
Abstract:
A mechanism for cleaving optical fibres, comprising fibre cleaving means and gripping members arranged to grip an optical fibre and to apply a pulling force to put the fibre under tension whilst the fibre is cleaved, wherein the gripping member(s) C are arranged to eject a cleaved-off part of the fibre F into a recpetacle 49 once the fibre has been cleaved, and/or the fibre F is bent during cleaving by means of a rotatable double anvil 47 widely separated from the gripping members.
Abstract:
An optical fibre distribution apparatus in which individual optical fibres (26, 27) are provided with collimator means at an end thereof, which collimator means can be located in position on an adaptor (30) by locator means (29), and in which a plurality of adaptors are carried in an array on a connection unit (20) to allow selective connections to be made between optical fibres associated with the said unit.
Abstract:
An optical device (10) comprising an enclosure (20) having a wall member defining a cavity and a sealable fibre entry portion, an optical component (30) located within the cavity and at least two optical fibres (40, 50) connected to the optical component and extending, substantially adjacent one another, through the entry portion. The invention also concerns a kit-of-parts for forming such a device, and a method of sealably enclosing an optical component.
Abstract:
An optical fibre connector (1) for forming a mechanical splice between first and second bare optical fibres stripped of coatings, the connector comprising a connector body that comprises at least two main clamping sections (23A, 23C) dimensioned to clamp directly onto the bare fibre of the first and second optical fibres, the main clamping sections arranged such that the first optical fibre may be clamped by a first of the main clamping sections independently of the second optical fibre, enabling the clamping of the first fibre against rotational and axial movement with respect to the connector body to remain substantially undisturbed by subsequent clamping or unclamping of the second fibre.