Abstract: An optical connector comprising, an alignment ferrule 11 receiving a plunger 38 and receiving an insert 35 between the plunger 38 and a constriction 32, the plunger 38 being constructed to receive an optical fiber 3 and a buffer 4 covering the optical fiber 3, and the plunger 38 and the insert 35 being constructed for movement forwardly to compact the insert 35 in the constriction 32 and to apply compression concentrically on the optical fiber 3.

Abstract: A communications cable for use in buried environments in an outside plant includes a core (22) comprising at least one transmission medium and a mechanically strengthened, thermal resistant barrier layer (40) disposed about a plastic tubular member (23). A metallic shield (32) and a plastic jacket (36) are disposed about the barrier. The barrier layer may comprise a tape (41) which is made of a material such as woven glass or an aramid fibrous material, for example, which is resistant to relatively high temperatures, which has suitable strength properties in all directions and at elevated temperatures and which is characterized by properties which cause the barrier layer to impede the passage therethrough of particles which are sufficiently large to cause damage to the core. In a preferred embodiment, the thermal barrier layer also includes provisions for preventing the longitudinal flow of water within the cable.

Abstract: In an optical connector in which a cable holder reciprocally movably accommodated within a connector housing is urged forward by springs to expose a front end of the holder from a front end of the connector housing, a pair of lock arms are disposed along the longitudinal side portions of the connector housing, and the lock arms are resiliently displaced inwardly at front ends thereof where retaining claws are formed, so as to cancel a connected state with an objective member and restored outwardly in order to obtain a connected state with the objective member, the optical connector is characterized in that the pair of lock arms are disposed along the longitudinal side surfaces of the cable holder, the springs are disposed in spaces formed between the lock arms and the longitudinal side surfaces of the cable holder, the lock arms and the cable holder are resiliently contacted with each other by the springs through inclined guides which are formed on one or both opposing places, the cable holder is pushed down

Abstract: An improvement for a large screen display eliminates the gap/grid line wh is otherwise present between abutted display modules. Each of the display modules has a light-emanating/reflecting display surface which provides a visual indication of the information content on a problem of a visual display for the large screen. A diverging strip is superimposed over each gap/grid line and at least a portion of the butting light-radiating display surfaces so that light is diverged from the abutted light-radiating surfaces to optically mask the gap/grid line and present a continuous uniterrupted display across the surface of the large screen display. The diverging strip can be tilted hollow fiber microchannels, tilted optical fibers or tilted plastic fibers inclined or fan-shaped at about a 10.degree.-15.degree. angle so that the gap/grip lines are optically masked.

Abstract: A variable light attenuator for use with multiple-fiber ribbons consisting of optical fiber elements. The attenuator consists of movable and fixed ferrule assemblies, each of which is fabricated by inserting a plurality of optical fiber elements arranged in line with equal pitch into a plurality of through holes arranged in line with equal pitch in a block of the substrate, and by polishing the end of the substrate together with the ends of the plurality of optical fiber elements so that the ends are finished to be eight degrees or more inclined with respect to a plane perpendicular to the optical axis of the movable and fixed ferrule assemblies.

Abstract: A device for displaying two-dimensional or three-dimensional images in which there is a light receiving system integrated, and unnoticeable, within the display itself through which the light receiving system can enable the image emitting system to display the same image that is being received or sending the image elsewhere, or both. Three devices are described for accomplishing this. The first is a two-dimensional system in which is shown a fiber optic faceplate with about half of the fibers separated and extended from the faceplate. About one half being the light receiving fiber and about the other half being the light emitters for image presentation. The light receiver could be a video camera, photo diode or other form of light receiver. The light emitter could be a diode, CRT or other form of light emitter. Also shown is the use of one and the same individual fiber optic being used to simultaneously receive and transmit an image such that separate fibers are not mandatory for this invention to operate.

Abstract: Within a common housing are mounted an autonomous light transmitter having its own transmitter optical coupling element, an autonomous light receiver, a part for connecting a common optical fiber to the common housing, and a beam splitter arranged in the beam path within the common housing. The autonomous light transmitter and the autonomous light receiver are each within their own hermetically sealed encapsulations and it is these hermetically sealed autonomous components which are mounted within the common housing.

Abstract: A coherent optical-fiber transmission system is rendered insensitive to fluctuations of the state of polarization of the electromagnetic field due to propagation along the fiber by varying at the transmitting side the state of polarization of the optical carrier modulated by the information signal to be transmitted. The variation is such that spectral broadening of the intermediate frequency signal at the receiver is kept limited, while reception of half the power outgoing from the fiber is ensured.

Abstract: A multiple optical fiber connector terminal includes a sleeve (6); a plurality of pins (7) disposed within the sleeve to form a plurality of receiving apertures (9); a plurality of filler rods (8) disposed between the sleeve and the pins; and a plurality of optical fibers (10) inserted into and bonded to the receiving apertures.

Abstract: An optical coupler is disclosed which couples a signal beam and a pumping beam having proximate wavelengths to each other. The optical coupler includes a first prism having an included angle of 45 degrees, and a triangular prism having an apex angle of 22.5 degrees and adhered to a face of the first prism on which an optical wavelength multiplexing film is formed. The signal beam and the pumping beam multiplexed by the optical coupled is introduced into an Er doped fiber, in which the signal beam is amplified directly.

Abstract: For the observation of an elongated object or an elongated zone (12) of an object with a lens (20, 20', 54), in the vicinity of this object or zone (12), a cylindrical lens (23) is used whose axis (Ox) extends along the largest dimension of the object or the zone. In this way, the observation is performed with a large resolution on an extended field.

Abstract: An optical interconnect structure, formed on a substrate, optically interconnects optoelectronic transmitting and receiving devices. The optical interconnect structure includes optical interconnects each of which includes a core member constructed of a material having a first predetermined index of refraction. The ends of the core members are chemically bonded either to an optoelectronic device or a core member of another optical interconnect. A cladding layer surrounds each core member. Each end of a cladding layer proximate to an optoelectronic device is chemically bonded to that device. The cladding layer is formed of a material having a second predetermined index of refraction, the magnitude of which is less than the magnitude of the first predetermined index of refraction.

Abstract: An optical fiber connector terminal includes a sleeve (6); a plurality of pins (7) disposed equidistance from a center within the sleeve to form a receiving aperture (9); a plurality of filler rods (8) disposed between the sleeve and the pins; and an optical fiber (10) inserted into and bonded to the receiving aperture.

Abstract: An electro-optical transducer module assembly has a substrate on which is secured a guided-wave transducer having an optical waveguide and electrode structure formed on one surface thereof with the waveguide surface in a facing relationship with the substrate. Spacers are provided to position the transducer above the substrate surface and means are provided to electrically connect the electrode structure with the substrate. Optical waveguides are affixed to the substrate adjacent to the transducer for coupling an optical signal into and out of the transducer.

Abstract: The invention provides a method for fabricating a polarization independent narrow channel wavelength division multiplexing fiber optic coupler, comprising the steps of: holding two optical fibers in an abutting longitudinal relation along a predetermined length of the fibers; injecting light energy into one of the fibers; fusing the optical fibers together along the predetermined length to form a fused length of a fiber optic coupler; elongating the fused length of the fusing optical fibers; measuring the light energy output from the ends of the first and second fibers; ceasing the fusing and elongating when the measured light energy output from the ends of the first and second fibers indicates that a predetermined number, N.sub.S, of one-half power transfer cycles have occurred in the coupler, where the N.sub.S th one-half power transfer cycle occurs within a K.pi. phase region of a polarization envelope associated with the coupler, where K is a positive integer.

Abstract: An optical fiber storage and distribution cabinet of molded plastic box-like construction with U-shaped formations open through the bottom wall of the cabinet to provide an easily molded door hinge and spool-like fiber storage elements which also serve to mount a removable splice tray. The splice tray has cable and fiber guide formations and splice holding means which allow fiber entry and exit from different directions.

Abstract: An active optical device comprises a glass, waveguiding structure disposed on a substantially planar principal surface of a substrate. The structure includes a silica-based, erbium-doped active core. The active core has an erbium-to-silicon atomic ratio of at least about 0.01, an absolute erbium concentration of at least about 1.4.times.10.sup.20 atoms per cubic centimeter, and a radiative lifetime of the erbium lasing level of at least about 7 milliseconds. Also disclosed is a method for forming an active optical device, including the step of depositing an erbium-doped active core by sputtering.

Abstract: Apparatus for the isotropic emission and for the isotropic reception of light which includes a light conductor having a conical distal end with a scattering body mounted thereon in spaced relationship such that a cavity is formed between the light conductor end and the scattering body. The apparatus permits access to cavities such as hollow organs for internal laser phototherapy, for example.

Abstract: A cable and connector system comprises a cable having a plurality of conductors for carrying electric current. The conductors are surrounded by a plurality of aramid fiber tension members that carry tensile loads that are applied to the cable. The conductors and tension members are wrapped with an aramid fiber armor tape. The armor tape protects the bundle from crushing loads and penetration by sharp objects. A connector is provided at each end of the cable whereby the tension members of the cable may be fixedly attached to the connector such that the tensile loads carried by the tension members are directly transmitted to the connector and are not transmitted to the conductors.

Abstract: An optical directional coupler switch is fabricated from a semiconductor substrate having a (111) plane. Thus, refractive indexes are changed for TE and TM modes by electrooptic effect, although the change amount is different between TE and TM modes. Therefore, a switching operation is realized for an incident light having any polarization. A device length L is preferrably set to meet an equation of "L.sub.TE .ltoreq.L.ltoreq.L.sub.TM " (L.sub.TE and L.sub.TM are coupling lengths for TE and TM modes) to decrease a cross-talk, even if the coupling lengths are different between TE and TM modes, considering that the difference is small.