Abstract: This optoelectronic system for the testing of a main antenna comprises: a test antenna designed to be placed in the field of transmission or reception of the main antenna; an optoelectronic component associated with the test antenna alternatively receiving and sending optical signals from/to remote transmitters/receivers and receiving and/or sending optical signals from/to the test antenna; an electric matching circuit connected between the optoelectronic component and the test antenna. This system thus enables the testing on the spot of an antenna (for example a radar antenna) without disturbing the radiation pattern of this antenna. This semiconductor component is therefore alternatively a modulator or a detector of light radiation, and it is connected by optical fibers to emitters and adapted detectors located out of the field of the antennas to be tested. The cables formed by dielectric materials do not disturb the radiation pattern of the antennas.

Abstract: A bidirectional optical amplification system which includes an optical amplifier having an input and an output and configured to amplify wavelengths lying within a range of wavelengths and an optical coupling device. The optical coupling device includes a first port configured to receive a first optical wave in a first subrange of wavelengths lying within a range of wavelengths, a second port configured to receive a second optical wave in a second subrange of wavelengths lying within the range of wavelengths, an optical coupling output coupled to the input of the optical amplifier, and an optical coupling input coupled to the output of the optical amplifier.

Abstract: An optical interconnection circuit includes a fixed number (N) of interconnected circuits (C1 to C16). Each circuit has an optical emitter (E1 to E16) and at least one optical receiver (R1, R16). The emitter outputs an optical wavelength which is specific to the circuit on which it is located. An optical coupler (CE) connects the emitter in each circuit to all receivers in the other circuits and each circuit (C1 to C16) has an address for identifying that particular circuit. The value of this address is applied to the emitter to adjust the optical wave length at which the emitter operates.

Abstract: Optical fibre delay line device for producing a delay on a guided light pulse proportional to the length of the optical fibre, comprising single means for the emission and detection of the light pulse, constituted by a semiconductor laser diode also having photodetecting properties and coupled to one of the ends of the optical fibre. The other end of the optical fibre is rendered reflective or is coupled to a waveguide of variable length, which also has a reflecting end, in such a way that the light pulse traverses the length of the optical fibre twice.

Abstract: A device for establishing optical connection links between electronic component cards forming part of a package. The device comprises a transparent plate having parallel faces and a light source which emits a divergent beam and is implanted on a first card. The beam is reflected from a first optical diffracting element in the form of a collimated beam which undergoes multiple reflections from alternate reflecting elements to a second optical diffracting element and is converted by the second element to a convergent beam transmitted to a detector which is implanted on a second card.

Abstract: A coupler comprising a photodiode having a central passage and fitted on the end portion of a first optical fiber which is rigidly fixed to a casing, a second optical fiber being rigidly fixed to a sleeve slidably fitted within the casing and having an end-face located at an adjustable distance from an end-face of the first optical fiber and from the photodiode in order to adjust the light-energy extraction rate to a predetermined value, and comprising means for adjusting the spacing between fibers.

Abstract: A device for storing information in an optical fiber transmission system, the storage of information, in particular in the form of digital data, being provided by creating at least one circulating memory using the optical fiber connecting terminals together as delay line. The transmissions takes place at a first wave length and each circulating memory uses a particular wave length, different from that of the other memories and from the transmission wave length. Each memory comprises, in a first terminal, a light source, a detector and a multiplexer for coupling with the connecting optical fiber and, in the terminal which is coupled thereto, a dichroic mirror selectively reflecting the wave lengths of the circulating memories and transmitting the other wave lengths.

Abstract: A system for connection by means of optical fibers for the bidirectional exchange of data between a fixed central unit and peripheral units integral with a frame driven with a rotary movement, this system comprising radiating energy emitting and receiving means situated in the fixed part, coupled by optical fibers forming unidirectional data exchange paths to a single mixing fiber, itself coupled to optical fibers forming bidirectional data exchange paths coupled to radiating energy emitting and detecting means associated with the peripheral units integral with the mobile frame. Furthermore, the mixing fiber is split into two parts coupled together by a rotary optical joint.

Abstract: The rotary-joint device has the design function of maintaining accurate positioning of the ends of optical fiber conductors during relative rotation of external bodies to which the joint is coupled. The device comprises a male ferrule and a female ferrule so arranged as to form a shaft rotatably mounted within a sleeve with a close but compliant fit, an abutment device for limiting the axial displacement of the sleeve, means for centering the ends of the conductors, and means for securing said ferrules to external connector bodies so as to form a rigid coupling and a semi-rigid coupling respectively.

Abstract: An optical connector arrangement for use on the bottom of a metallic box, the connector providing optical connection between a printed circuit card inserted into the metallic box and an optical cable. A sleeve assembly couples the connector to the box so as to provide lateral mobility of the connector with respect to the box. This lateral mobility facilitates alignment between an optical terminal protruding from the printed circuit card and an optical terminal of the cable. The connector further includes means for maintaining a pressure between the two terminals.

Abstract: An electro-optical switching apparatus which comprises at least an input photo-emitter circuit which lights up a switching matrix comprising a plurality of switching elements selected with two pluralities of crossed connections. Under the control of switching signals one of these elements turns on and allows the light to pass through. An image of this switching matrix is formed by a lens onto a matrix of photo-receiver circuits and the light transmitted through the turned on switching element induces in one of said photo-receiver circuits a transmitted switched signal.

Abstract: An electroluminescent and photodetector diode comprises two electrodes made of materials which are transparent to a radiation of given frequency band, and, arranged between these two electrodes, a very thin layer of a material absorbing said radiation. This diode can be used in a busbar line.

Abstract: A multichannel coupler for connecting a plurality of input fibers to a plurality of output fibers which comprises a mixing fiber coupled to the pluralities of fibers. This mixing fiber is cut along a transversal cut and the two parts thus obtained are secured end to end. At least one of the surfaces delimiting the cut is ground for having a better distribution of the transmitted light onto the output fibers.

Abstract: The invention relates to a positioning ferrule for an optical fibre providing an adjustable connection between two fibres. The positioning ferrule according to the invention comprises detecting means for detecting the uncoupled radiation in the down-side fibre and therefore transmitted in the sheath of the latter. The process for adjusting a connector comprising said ferrule comprises producing a relative displacement of the axes of two fibres so that the detected radiation is minimum. The invention is applicable to long-distance optical telecommunications employing monomode optical fibres.

Abstract: A telephone set for optical fibers lines having a coupler for directing a first part of the light received from the input optical fiber on a photo-cell and a second part of this light on a microphone modulating this second part without electrical intermediate apparatus, the photo-cell feed alternately a bell or a receiver, and the light modulated by the microphone is directed via a dialling system on the output optical fiber.

Abstract: A brancher-mixer for optical fibres bundles enabling the luminous energy emanating from a transmitting bundle to be divided between two receiving bundles and essentially consisting of two monofibres laterally coupled at one of their ends to divide the luminous flux emanating from the transmitting bundle. The two monofibres are arranged in a common casing provided with mechanical connections to establish the optical connections to the three bundles of fibres.

Abstract: The invention provides a multi-channel optical coupler forming a single component which can be attached to the front panel of an equipment. A single central U-shaped optical fibre acts as a mixer waveguide. The terminal faces of this central waveguide are coplanar and optically connected to the single fibres or to the bunches of fibres, which constitute the incoming and outgoing channels, by two sets of single intermediate mixer fibres. Each intermediate fibre is equipped with a standard mechanical connecting element of detachable design, all these connecting elements being arranged in the same plane.

Abstract: This invention provides a coaxial cable of the type comprising a central electric conductor and a peripheral electrically conducting screen separated from one another by a solid dielectric, this cable further comprising optical fibres embedded in the dielectric and symmetrically distributed between the central conductor and the peripheral screen.

Abstract: The present invention relates to an adjustable radiation distributor for fiber optics networks. This distributor effects distribution of an incident radiation between several optical cables by means of a fixed coupling element of fork shape, the body of which communicates with an optical linking cable. One of the ends of the optical linking cable can be mechanically displaced.

Abstract: The invention provides a substrate for positioning the end of one or more optical fibres in a reference plane. Each fibre is positioned by means of three right circular cylindrical dowels in a staggered arrangement on the flat trued face of a parallelepiped. The substrate may further comprise a single additional optical fibre bearing against the apertures of the transmission fibres and doing duty as a cylindrical lens for coupling each transmission fibre with the emissive zone of a laser diode.