Abstract: An optical waveguide for transmission of radiation, in particular of the radiation from a high-power diode laser, and a method for its production are provided. The optical waveguide has an elongated light inlet surface, which is in the form of a gap, consisting of one or more layers of optical fibers, with the fibers being connected at least partially in an form-closed manner to one another and to a mounting plate.

Abstract: A sensor is provided. The sensor includes a substrate, a waveguide having a first surface and a second surface, wherein the waveguide is disposed on the substrate such that at least a portion of the second surface of the waveguide is in physical contact with the substrate, a holder component disposed on at least a portion of the substrate, or the waveguide, or both, wherein the holder component comprises one or more cavities. The sensor further includes at least one microsphere at least partially disposed in a corresponding cavity of the holder component.

Abstract: An optical fiber cable includes at least one buffer tube that includes a plurality of water-blocking plugs and an optical fiber. The water-blocking plugs can be spaced along the buffer tubes, substantially filling the cross-sectional space within the buffer tube not already filled by the optical fiber. The water-blocking plugs can provide a stronger bond between the optical fibers and the inner tube. This is reflected by a high normalized pullout force for the optical fiber, such as, above 5.0 N/m. Yet, the resulting fiber optic cable does not suffer from problems associated with a higher pullout force, such as attenuation.

Abstract: A saturable absorber (SA) is constructed using a fiber taper embedded in a carbon nanotube/polymer composite. A fiber taper is made by heating and pulling a small part of standard optical fiber. At the taper's waist light is guided by the glass-air interface, with an evanescent field protruding out of the taper. Carbon nanotubes mixed with an appropriate polymer host material are then wrapped around the fiber taper to interact with the evanescent field. Saturable absorption is possible due to the unique optical properties of the carbon nanotubes. The device can be used in mode-locked lasers where it initiates and stabilizes the pulses circulating around the laser cavity. The SA can be used in various laser cavities, and can enable different pulse evolutions such as solitons, self-similar pulses and dissipative solitons. Other applications include but are not limited to optical switching, pulse cleanup and pulse compression.

Abstract: The present disclosure relates to a telecommunications cable having a jacket including a feature for allowing post-extrusion insertion of an optical fiber or other signal-transmitting member. The present disclosure also relates to a method for making a telecommunications cable having a jacket including a feature for allowing post-extrusion insertion of an optical fiber or other signal-transmitting member.

Abstract: A method for manufacturing an optical waveguide in which multiple cores are embedded in a parallel-arranged fashion within a single cladding, the cores having a refractive index of light different from that of the cladding, the method includes forming the multiple cores in a state where the adjacent cores are connected by a rib, forming the cladding around the rib and the multiple cores by curing a cladding material there around, and a cutting to the rib.

Abstract: An optical printed circuit board is provided. The optical printed circuit board includes an insulation member, an optical fiber disposed in the insulation member and having opposite end portions exposed to a side of the insulation member, and at least one supporting member provided with a guide portion coupled to the opposite end portions of the optical fiber and guiding bending of the optical fiber.

Abstract: A method for manufacturing an optical cable for communication includes at least one micromodule, said micromodule being blocked with respect to the propagation of water. The method includes the steps of providing at least one optical fiber; embedding the at least one optical fiber in a pseudoplastic filling compound having a viscosity of 3 Pa·s to 30 Pa·s, preferably 7 Pa·s to 25 Pa·s at a shear rate of 10 s?1 and at a temperature of 100° C., and a cross-over lower than 30 Hz, preferably 5 Hz to 25 Hz, at a temperature of 100° C.; and extruding a retaining element made of a thermoplastic polymeric composition around the at least one optical fiber so embedded in the filling compound to obtain a micromodule.

Abstract: A process for forming a fiber optical cable assembly comprises the steps of (a) subjecting a first high yenacity reinforcement yarn such as para-aramid that is coated with a water-impermeable thermally reversible cross-linked polymeric coating to a temperature of from 45 to 200° C. for sufficient time to convert the protective coating via bond cleavage into a water-swellable super absorbent polymer, (b) combining one or more of the first reinforcement yarns from step (a) with one or more optical glass fiber transmission media and (c) applying a protective sleeve over at least one assembly of step (b).

Abstract: Fiber optic cables and methods of manufacturing fiber optic cables are disclosed herein. According to one embodiment, a fiber optic cable includes a plurality of optical fibers having a lay length of greater than 160 mm. The fiber optic cable also includes strength material surrounding the plurality of optical fibers and a polymer jacket surrounding the strength material. Each of the optical fibers is configured to exhibit a bend-induced optical attenuation of less than or equal to about 0.6 dB when wrapped one turn around a 7.5 mm mandrel.

Abstract: Methods for manufacturing cables and cables assemblies include providing particulate matter within a tube extruded about optical fiber. The particles may be accelerated so that as they strike the tube they mechanically attach to the tube.

Abstract: A multicore optical fiber includes a plurality of core regions disposed within a common cladding region. Each of the plurality of core regions is configured, in combination with the common cladding region, to propagate light along a longitudinal axis of the fiber. At least two core regions are configured to inhibit resonant coupling of propagated light therebetween within a selected region of operation. At least one segment of the fiber includes a twist that is configured such that when the twisted segment is subjected to a bend having a selected radius, the twist creates a controlled change in the amount of crosstalk between the at least two core regions, compared with the amount of crosstalk between the at least two core regions when a bend having the selected radius is introduced into a non-twisted segment of the fiber.

Abstract: A fiber optic mechanical structure (104) including a substrate configured with plurality of grooves wherein the grooves are split into a first grooves slots and a second grooves slots. A first group of plurality of fibers is placed on the substrate (204) wherein the jackets of one end of each of the first group of plurality of fibers (404) is removed (208) and are secured in the first grooves slots (416). A second group of plurality of fibers (408) is placed on the first group of plurality of fibers (404) wherein the jackets of one end of each of the second group of plurality of fibers is removed and are secured in the second grooves slots (420).

Abstract: The invention relates to a method for creating a fibre strip (12) composed of individual fibres (11). some sections of the latter (11) being subjected to a surface treatment, far example by moms of a laser (13). According to the invention, the individual fibres (11) are conducted in the fibre strip (12) without torsion, at least between the treatment process step and the fitting process step to prevent distortion. This ensures that the angular position of the surface-treated sections in the fibre strip (12) can be advantageously predicted and that the optical behaviour of the fibre strip, which is dependent on the flexure, permits conclusions to be drawn about the degree of bonding in the fibre strip. The fibre strip can be used, for example, as a sensor strip, which can be utilised in the bumper of a motor vehicle to identify the impact of pedestrians.

Abstract: An optical cable for communication includes at least one retaining element blocked with respect to the water propagation as well as a process for manufacturing such an optical cable. The optical cable includes, in addition to the retaining element, at least two transmission elements housed within the retaining element and a water swellable yarn housed within the retaining element. The water swellable yarn is selected according to the following equation: V w V TF = k V t + R ( I ) in which Vw is the volume of the water swellable yarn after swelling upon contact with water; VTF is the total free volume in the retaining element; k is a constant?180; R is a constant?1.4; and Vt is the free volume per each transmission element. Advantageously, the optical cable is water-blocked and the water swellable yarn does not induce microbending effects on the transmission elements.

Abstract: A crush-resistant fiber optic cable is disclosed, wherein the cable includes a plurality of bend-resistant multimode optical fibers. The fibers are generally arranged longitudinally about a central axis, with no strength member arranged along the central axis. A tensile-strength layer surrounds the plurality of bend-resistant optical fibers. A protective cover surrounds the tensile-strength layer and has an outside diameter DO in the range 3 mm?DO?5 mm.

Abstract: In an optical waveguide, the present invention provides a process for producing an optical waveguide, and a stamp for use in the production process, in which the thickness of a lower cladding layer in the portion positioned in the lower side of a core layer is easily controlled even if any one or more materials of a substrate, a cladding material, and a stamp are material with low rigidity. The production process of the present invention comprises steps of forming a lower cladding layer which has a core groove and spacer grooves formed substantially in parallel with intervals in both sides of the core groove on a substrate by making use of soft lithography with a second stamp (i.e.

Abstract: A method for producing an optical fiber element provided with several optical fibers disposed in a matrix, including: a) placing and maintaining the several optical fibers in grooves formed in a mould plate, said grooves being in different planes, b) injecting a hardenable material adhering to the several optical fibers, c) solidifying the hardenable material to maintain the several optical fibers in a position set by the grooves, and d) removing at least the mould plate.

Abstract: A method of installing a cable for the distributed measurement of a physical parameter, includes providing a cable adapted to measure a physical parameter at a plurality of points along the carrier tube, inserting the cable through a carrier tube, injecting a hardenable fluid into the carrier tube, and hardening the hardenable fluid material to be in a substantially solid state.

Abstract: An improved multimode fiber optic cable is designed to compensate for the wavelength distribution and emission pattern of laser sources used in high-speed communication systems. The improved multimode fiber optic cable compensates for the wavelength dependent VCSEL polar emission pattern to reduce modal dispersion. Techniques for reducing the modal dispersion within the improved multimode fiber optic cable allow for improved Bit Error Rate (BER) system performance and/or to achieve greater reach in high bandwidth optical channel links are disclosed. Considerable efforts have been undertaken in the design and production of an improved multimode fiber optic cable to minimize modal dispersion, ignoring the effects of wavelength dependent polar emission patterns in lasers. Material dispersion effects have a significant impact on modal dispersion and by modifying a standard parabolic refractive index profile to compensate for material dispersion effects, overall modal dispersion can be reduced.

Abstract: A backlight subsystem includes first and second lightguides separated by an interfacial layer. The first lightguide has an output surface oriented toward an associated first illumination field, a back surface, and at least one light input edge. The second lightguide has output surface oriented toward an associated second illumination field, a back surface, and at least one light input edge. An interfacial layer is arranged between the back surfaces of the first lightguide and the second lightguide. The interfacial layer is substantially optically non-absorbing and may be predominately optically transmissive or predominately optically reflective.

Abstract: An optical transmission element comprises a core section including a plurality of optical fibers where each one of the optical fibers is in contact with at least two other optical fibers. The optical transmission element also has a sheath section including a sheath layer surrounding the core section such that the sheath layer is in contact with the optical fibers.

Abstract: Disclosed herein is a printed circuit board for an optical waveguide, including: a lower substrate; an insulation layer which has a through-hole and is formed on the lower substrate; an optical waveguide which is formed in the through-hole such that a clearance is present between the optical wave guide and an inner wall of the through-hole; and an adhesive material which is charged in the clearance. The printed circuit board for an optical waveguide is advantageous in that a lower clad material, a core material and an upper clad material are sequentially applied on the lower substrate partially, not entirely, based on the region in which a core is formed, and is then patterned to form an optical waveguide, so that the amounts of the lower and upper clad materials and the core material, which are used to form the optical waveguide, can be greatly decreased.

Abstract: Residue is prevented from being generated in a groove on a substrate. An optical waveguide device is provided with the substrate (10) having a V-groove (11) for attaching optical fibers (41-45); a lower clad layer formed on the substrate (10); a core layer having an optical waveguide pattern formed on the lower clad layer; and an upper clad layer formed on the lower clad layer and the core layer having the optical waveguide pattern. The sum of the thickness of the lower clad layer and the thickness of the core layer is 18 [?m] or more.

Abstract: An extrusion-molding apparatus for a loose tube includes: an extrusion head that includes a tip and a die concentrically arranged therewithin and extrudes a tube between the tip and the die; a needle that feeds at least one optical fiber and filler to be filled around the optical fiber into the tube being extrusion-molded; and a cylindrical bundling member provided within the needle. The bundling member has a bundling hole being smaller than an inner diameter of the tube at a center thereof and into which the optical fiber can pass through, and a flow pass penetrating along a feeding direction of the filler between the bundling hole and an inner circumferential surface of the needle. In an extrusion molding method using the extrusion-molding apparatus, the optical fiber is passed through a bundling hole to be bundled at an almost center of the tube. In addition, filler is passed through a flow path to be filled around the optical fiber.

Abstract: Various embodiments described herein comprise hollow core (HC) photonic bandgap fibers (PBGF) with a square lattice (SQL). In various embodiments the, HC SQL PBGF includes a cladding region comprising 2-10 layers of air-holes. In various embodiments, the HC SQL PBGF can be configured to provide a relative wavelength transmission window ??/?c larger than about 0.35 and minimum transmission loss in a range from about 70 dB/km to about 0.1 dB/km. In some embodiments, the HC SQL PBGF fiber can be a polarization maintaining fiber. Methods of fabricating such fibers are also disclosed herein along with some examples of fabricated fibers. Various applications of such fibers are also described herein.

Abstract: The invention relates to a cable (10) that includes an outer sheath (11) defining a longitudinal cavity (12). The cable (10) also includes a plurality of elements (1) extending within the cavity. Typically, the elements are at least partially coated with a lubricant film.

Abstract: An optical delay line is formed from a coil of optical fiber (in many cases microfiber), where the radius of the optical fiber is greater than the wavelength ? of the propagating signal and the radius R of the coil is selected, in consideration with the optical fiber radius, to limit propagation loss by minimizing coupling between adjacent turns of the coil. The difference in dimension between the fiber diameter and wavelength prevents the mode propagating along one turn from coupling into an adjacent turn. It has been discovered that the modal intensity at the interface between the central rod and the coil will be minimized when the radius of the fiber satisfies the following condition: r >> ( R ? 2 ) 1 / 3 , where ?=(2?n)/?, and n is the refractive index of the fiber.

Abstract: A cable fixing structure for fixing a cable covered with a covering layer made of resin to a receptacle having a chase portion for holding the cable is disclosed in which the cable has, in a segment of the cable, a catch portion formed integrally with the covering layer so as to expand toward the outside of the cable and the receptacle has a recess portion, communicating with the chase portion, in which the catch portion fits.

Abstract: An optical waveguide includes a cladding film and a core formed integrally with the cladding film. The core includes a light guide portion formed on one surface of the cladding film, a light input portion, and a light output portion, the light input portion and the light output portion being formed in through-holes formed in the cladding film. A mirror surface is respectively formed at a connecting portion between the light guide portion and the light input portion and a connecting portion between the light guide portion and the light output portion. In manufacturing the optical waveguide, the cladding film is brought into close contact with a surface of a mold, the surface having a recessed groove thereon, and a UV-curable resin is injected under pressure through one of the through-holes opened in the cladding film into the recessed groove.

Abstract: A method of forming a waveguide, the method comprising the steps of: forming a multilayer stack of light guiding layers; and delaminating the multilayer stack between at least two of the light guiding layers to form a waveguide between the light guiding layers; in which the patterned region has converging sides and the waveguide is tapered, the multilayer stack having increased transmissivity at a region corresponding to a selected thickness of the waveguide. A tapered waveguide is also disclosed, comprising: a multilayer stack of light guiding layers; the multilayer stack defining a channel between at least a first waveguiding layer and a second waveguiding layer; the channel having a diminishing thickness in a first direction; and at least one of the first waveguiding layer and the second waveguiding layer having a region of increased transmissivity adjacent a selected thickness of the core. Methods for the use of the tapered waveguide as an optical coupler or spectrometer are also disclosed.

Abstract: A multi-core fiber for an optical pumping device is provided. The multi-core fiber includes a plurality of optical fibers that are inserted into holes of an alignment member. The optical fibers and the alignment member are integrated by heating. The alignment member includes a material that has a lower softening temperature than a softening temperature of the optical fibers.

Abstract: A method for manufacturing an optical probe which uses optical fibers arranged in parallel which can be easily bent by application of a heat source to improve the performance of the optical probe. The bend may be created by application of heat by a heat source and then forcing a change in the shape of the optical probe. Alternatively, an optical probe may be bent in room temperature and then by applying heat from a heat source, a bend can be created in the optical probe.

Abstract: A process for manufacturing a water-resistant telecommunication cable. The cable has a solid and compact element having a water-soluble polymer material having vinyl alcohol/vinyl acetate copolymer having a hydrolysis degree of 60-95% and a polymerisation degree higher than 1,800 and at least one solid low-melting and one solid high melting plasticizers. The process produces continuously the water-soluble polymer material by separately feeding, in sequence, a multi-screw extruder, in the flow direction, with the copolymer and the high melting plasticizer melting and mixing them while transporting them through the extruder, and with the low melting plasticizer, melting and mixing them with the copolymer and the high melting plasticizer, subsequently homogenizing the copolymer and the plasticizers and finally discharging the melt, at a temperature lower than or equal to 205° C. A process for extruding the above PVA based water-soluble polymer material.

Abstract: An illumination fiber optic ribbon includes optically-transmissive fibers which are adjacent to each other. At least two of the optically-transmissive fibers are twisted together to form a twisted segment. Where the two optically-transmissive fibers are not twisted forms a non-twisted segment. The twisted segments and non-twisted segments alternate along the length of the ribbon. Bends are disposed along the twisted segment and are formed by twisting adjacent optically-transmissive fibers. A light source is connected to one or both ends of the optically-transmissive fibers. The light source emits a light flux into the ribbon so that light emits from the bends in the twisted segment.

Abstract: An optical cable is manufactured in a single continuous process starting directly from at least an optical preform, by means of a fiber/cable integrated manufacturing line including a fiber(s) drawing assembly for the production of one or more optical fibers from respective optical preforms, and a cabling assembly for producing the optical cable from the optical fiber(s), the cabling assembly comprising a fiber buffering assembly for the application of a loose or tight coating to the optical fiber(s), and a strengthening and sheathing sub-assembly for applying one or more reinforcing and protective layers to the buffered optical fiber(s).

Abstract: Provided is an optical waveguide manufacturing method that makes the thickness of a clad layer in the vicinity of a core portion uniform. A first lamination film is fabricated by forming a clad layer by forming a first curable resin layer for clad formation on a first base film and curing the first curable resin layer, and forming a core portion by forming a second curable resin layer for core formation having a higher refractive index than that of the clad layer after cured on the clad layer and selectively curing the second curable resin layer. A second lamination film is fabricated by forming a clad layer by forming a third curable resin layer for clad formation on a second base film and curing the third curable resin layer.

Abstract: The optical element array and an optical waveguide array are optically connected on the substrate. The optical waveguide array includes optical waveguide channels which are the outermost optical waveguide channels on both sides of optical waveguide array channels and each of which is provided with a mirror structure for light redirection. With the optical element array driven by a bias applied thereto, the optical waveguide array is brought near the optical element array. The optical axes of the optical waveguide array channels and the optical element array are aligned while monitoring optical signals outputted from the outermost optical waveguide channels on both sides of the optical waveguide array channels via the mirror structures for light redirection. The optical waveguide array is fixed to the substrate in such a position that the optical signals have a desired output value.

Abstract: A fiber optic cable includes an optical fiber, a strength layer surrounding the optical fiber, and an outer jacket surrounding the strength layer. The strength layer includes a matrix material in which is integrated a plurality of reinforcing fibers. A fiber optic cable includes an optical fiber, a strength layer, a first electrical conductor affixed to an outer surface of the strength layer, a second electrical conductor affixed to the outer surface of the strength layer, and an outer jacket. The strength layer includes a polymeric material in which is embedded a plurality of reinforcing fibers. A method of manufacturing a fiber optic cable includes mixing a base material in an extruder. A strength layer is formed about an optical fiber. The strength layer includes a polymeric film with embedded reinforcing fibers disposed in the film. The base material is extruded through an extrusion die to form an outer jacket.

Abstract: An optical transmission element comprises optical waveguides embedded into a UV-curing protective layer. The optical waveguides and the UV-curing protective layer are surrounded by a sheath, on which spherical elements are arranged. A conductive layer is applied on the sheath and the spherical elements arranged thereon, said conductive layer having a resistivity. of an order of magnitude of 5·1010 ohms per meter measured at a temperature of between 18 degrees Celsius and 24 degrees Celsius and a relative humidity of 45 percent. In the case of an optical transmission element of this type, electrostatic charging when the optical transmission element is blown into an empty conduit is avoided to the greatest possible extent, such that possible blowing-in lengths within a range of between 500 meters and 1000 meters are obtained.

Abstract: A method for manufacturing an optical cable for communication includes at least one micromodule, said micromodule being blocked with respect to the propagation of water. The method includes the steps of providing at least one optical fiber; embedding the at least one optical fiber in a pseudoplastic filling compound having a viscosity of 3 Pa·s to 30 Pa·s, preferably 7 Pa·s to 25 Pa·s at a shear rate of 10 s?1 and at a temperature of 100° C., and a cross-over lower than 30 Hz, preferably 5 Hz to 25 Hz, at a temperature of 100° C.; and extruding a retaining element made of a thermoplastic polymeric composition around the at least one optical fiber so embedded in the filling compound to obtain a micromodule.

Abstract: In a method for the production of optical bands with several optical fibers, the surface of the optic fibers in said bands is treated such as to increase the optical damping in sections of the optic fibers. The generated damping may be reliably adjusted, whereby during (or after) the processing of the surfaces a measuring light is introduced into the fiber optic and the light output at the other end of the band is measured by means of a sensor such as a CCD camera. Possible production errors can thus be compensated for during the production process, for example, by an increased process time for the optic fiber. Optical sensor bands can be produced by the above method for application in the bumpers of motor vehicles as recognition sensors for the impact of a pedestrian. Other applications in which the bending of a sensor band is to be determined by optical means are also envisaged.

Abstract: A method of manufacturing a photonic bandgap fibre comprises preparing composite rods having a central region of a first refractive index, and a surrounding region of a second refractive index. There follow steps of: selectively removing the surface of the composite rods to produce composite rods having a part with a first diameter and a part with a second diameter larger than said first diameter; stacking composite rods around a core rod; inserting the stacked rods into jacket tube to form an assembly; and reducing the jacket tube and stacked rods into fibre. Embodiments may comprise measuring the refractive index of the composite rods to calculate a ratio of diameters of the central region and surrounding region to determine an amount of the surface of the composite rods to remove. Further embodiments may comprise flowing chlorine gas through the assembly to remove impurities or moisture present in the surface of rod and jacket tube of the assembly.

Abstract: A photonic bandgap optical fiber and a method of manufacturing said fiber is disclosed. The photonic bandgap fiber comprises a core region surrounded by cladding region. The cladding region includes a background optical material having a first refractive index, and elements of optical material having a second refractive index higher than said first refractive index. The elements are arranges periodically in the background optical material. At the drawing temperature of the fibered, the background optical material has a viscosity lower than the viscosity of the optical material of the elements.

Abstract: In a method of manufacturing an optical waveguide using a flat die having a groove therein, the method includes: (a) forming a first cladding sheet on a base substrate; (b) placing the first cladding sheet and the base substrate on the flat die such that the first cladding sheet faces the groove of the flat die; (c) filling the groove with a liquid resin and then curing the liquid resin, thereby forming a mirror support on the first cladding sheet; (d) removing the flat die from the first cladding sheet; (e) forming a metal reflection film on the mirror support; (f) forming a core sheet on the first cladding sheet such that the core sheet covers the mirror support that is formed with the metal reflection film; (g) forming a second cladding sheet on the core sheet; and (h) removing the base substrate from the first cladding sheet.

Abstract: An over-molding tool is provided for over-molding an over-mold onto a fiber optic cable assembly. The over-molding tool includes first and second mold tool sets. The first mold tool set applies a first portion of the over-mold onto the fiber optic cable assembly. The second mold tool set then applies a second portion of the over-mold onto the fiber optic cable assembly. In preferred embodiments, the first and the second portions of the over-mold fuse to each other. By employing the first and the second mold tool sets, the fiber optic cable assembly can be supported at closer intervals along its length when being over-molded in comparison to a single, longer mold tool set. In addition, a lower capacity injection pump can be used when applying the over-mold in two portions. In other embodiments, additional mold tool sets can be added that sequentially apply additional portions of the over-mold.

Abstract: A microchannel plate (MCP) for an image intensifier includes an active portion having an input surface area for receiving electrons and an output surface area for outputting multiplied electrons. The input and output surface areas are oriented horizontally with respect to each other and spaced by a vertical distance. A non-active portion surrounds the active portion of the MCP. The non-active portion includes at least one slot extending vertically into the non-active portion and extending horizontally to form a horizontal slotted area. When the MCP is positioned vertically above an electron sensing device having wires looping vertically above the electron sensing device, the slot is configured to receive a portion of the wires, resulting in a vertical clearance between the MCP and the electron sensing device. The wires loop a vertical looping distance above a surface of the electron sensing device, and a portion of the vertical looping distance is configured to be received within the slot of the MCP.

Abstract: An optical cable comprises a cable core (100) containing at least one optical transmission element (10a, 10b). The cable core (100) is free of filler composition. It contains, as optical transmission elements, a plurality of tight-buffered conductors (10a) or a plurality of bundle conductors (10b) which are arranged around a centrally arranged strain relief element (20). The cable core (100) is surrounded by a sleeve (200), which is extruded or pumped around the cable core. The sleeve layer (200) contains a plastic material with which swellable materials, for example acrylates, are mixed as filler. A cable sheath (300) is extruded around the sleeve layer (200). The swellable filler embedded in the sleeve layer brings about an increase in the volume of the sleeve layer (200) upon contact with water, whereby the cable core (100) is sealed against penetrating moisture.

Abstract: A method for fabricating a terahertz waveguide comprises forming a multilayer reflector formed of alternating layers of first and second polymer materials with distinct refractive indices, and defining with the multilayer reflector a hollow core through which terahertz radiation propagates. The corresponding terahertz waveguide comprises the multilayer reflector formed of the alternating layers of the first and second polymer materials with distinct refractive indices, and a hollow core defined by the multilayer reflector and through which terahertz radiation propagates.

Abstract: A telecommunications cable includes a distribution cable, a tether branching from the distribution cable at a breakout location, and an enclosure that surrounds the breakout location. The enclosure is secured to the distribution cable at first and second adhesion regions. The enclosure can also secure to the tether at a third adhesion region. The adhesion regions are treated by sanding the regions, cleaning the regions, and then plasma-etching the regions immediately before welding/injection molding the enclosure around the breakout location.