Abstract: Bend resistant multimode optical fibers are disclosed herein. Multimode optical fibers disclosed herein comprise a core region having a radius greater than 30 microns and a cladding region surrounding and directly adjacent to the core region, the cladding region comprising a depressed-index annular portion comprising a depressed relative refractive index. The fiber has a total outer diameter of less than 120 microns, and exhibits an overfilled bandwidth at 850 nm greater than 500 MHz-km.

Abstract: A laser glass fiber with a core of the fiber comprising a silicate glass host, one or more glass network modifiers, one or more glass network intermediators, and Thulium ions, Holmium ions, or a combination of Thulium ions and Holmium ions. The fiber emits laser light from 1.7 micron to 2.2 micron.

Abstract: The first aspect of the instant claimed invention is a method of formulating radiation curable Supercoatings for application to an optical fiber used in a telecommunications network. A Multi-layer Film Drawdown Method useful in the Method of formulating radiation curable Supercoatings is also described and claimed. Single mode Optical fibers coated with specific radiation curable Supercoatings are also described and claimed.

Abstract: The invention relates to radiation curable compositions. The invention provides radiation curable optical fiber primary coating compositions comprising an oligomer, a reactive diluent monomer blend comprising at least two reactive diluents monomers, and at least one photoinitiator, wherein each of said monomers in said blend has the formula (I) wherein x is an integer of from 1 to 6; n is an integer of from 1 to 5; and each Y, which may be the same or different, is independently selected from the group consisting of hydrogen, a C1 to C12 alkyl group and an alkarylalkoxylated acrylate radical; and at least one photoinitiator; said reactive diluent monomer blend being substantially free of non-aryl reactive diluent monomers; wherein when an aryl reactive diluent monomer is present that has a molecular weight less than about 300, it is present at no more than about 10 wt. % of the total formulation.

Abstract: An optical fiber switch which may include first and second angled optical fibers having respective first and second end faces. Each of the first and second angled optical fibers may include a core having a core index of refraction, and a cladding surrounding the core and having a cladding index of refraction different than the core index of refraction. The optical fiber switch may further include a first index matching elastomeric solid layer having a proximal face coupled to the first end face and a distal face opposite the proximal face to be repeatably optically coupled to the second end face. The first index matching elastomeric solid layer may have an index of refraction profile matching an index of refraction of the core and the cladding. The optical fiber switch may also include at least one actuator for relatively moving the first and second angled optical fibers between a coupled position and an uncoupled position.

Abstract: A curable composition for an optical material including a specific silicon-containing polymer (A), a specific epoxy resin (B) and an energy ray-sensitive cationic polymerization initiator (C) as essential components.

Abstract: A high efficiency electro-optic dendrimer based technology for nanophotonic integrated circuit devices is presented. In particular, a high power terahertz (THz) source is implemented using an electro-optic dendrimer via electro-optic rectification. Electro-optic rectification provides inherent power scalability, because, pump-THz conversion is not limited either by emission saturation or by heat dissipation. Low dielectric loss and high electro-optic coefficient of dendrimer along with a waveguide structure provides higher output power and tunable THz power generation. A dendrimer fiber array is also disclosed by means of which the input/output signals are connected to multiple components and devices.

Abstract: An optical element includes a substrate having a passive waveguide and a laser waveguide disposed therein. The laser waveguide is in direct contact with the passive waveguide over a surface of contact so as to provide a butt coupling between the passive waveguide and the laser waveguide. A step extends between an upper edge of the passive waveguide and an upper edge of the laser waveguide. A covering is disposed on the passive waveguide so that the covering and the substrate together provide a cladding of lower refractive index around the passive waveguide and so that a hollow space is disposed between a lower edge of the covering and the upper edge of the laser waveguide.

Abstract: An acid-stop structure for a rib waveguide comprises a fin structure formed between the sidewalls in each rib channel of the rib waveguide, thereby preventing acids and other etchants from flowing down the rib channel and under a die that has been bonded to a wafer.

Abstract: The disclosure relates to an optical fiber including a core and a cladding having a core material and a cladding material, respectively, wherein the fiber is a non-linear microstructured optical fiber, the microstructured optical fiber being obtainable by a method including loading the core material and optionally the cladding material with hydrogen and/or deuterium whereby the lifetime of the fiber may be extended in high pulse applications.

Abstract: A repeatable optical waveguide interconnection may include first and second optical waveguides having respective first and second end faces. Each of the first and second optical waveguides may include a core having a core index of refraction, and a cladding surrounding the core and having a cladding index of refraction different than the core index of refraction. The repeatable optical waveguide interconnection may further include a first index matching elastomeric solid layer having a proximal face chemically bound to the first end face and a low-tack distal face opposite the proximal face to be repeatably optically coupled to the second end face. Further, the first index matching elastomeric solid layer may have an index of refraction matching at least the index of refraction of the core.

Abstract: A low cost, high performance, low profile flexible reinforcement member that can be used for both optical and copper communications cable. The reinforcement members made according to the preferred process are more rigid than known reinforcement members, but are less rigid than glass pultruded rods. Communications cables utilizing these members are lightweight and exhibit an improved combination of strength and flexibility compared to traditional communications cables. Further, these communication cables may then be installed into underground ducts using more economical and faster installation techniques.

Abstract: Provided are an optical waveguide and a production method thereof which can constrict both the width and thickness of the SOI optical waveguide core layer in the same process and at the same time, simplify production process, and reduce optical losses. An optical waveguide includes a first clad layer formed on a semiconductor substrate; a first core layer formed on the upper side of the first clad layer with the use of a semiconductor material the refractive index of which is higher than that of the first clad layer; and a second clad layer formed on the upper side of the first core layer with the use of a material the refractive index of which is lower than that of the first core layer. The width of the first core layer is defined based on the width of an unoxidized semiconductor material sandwiched between oxide films the parts of which are thermally oxidized.

Abstract: Provided is an optical fiber including: a first core at a center thereof; a second core adjacent to the first core to cover a circumference of the first core; a third core adjacent to the second core to cover a circumference of the second core; and a cladding adjacent to the third core to cover a circumference of the third core, where conditions of 0.28%??1?0.4%, ?0.05%??2?0.05%, ?1.0%??3??0.5%, 3.8 ?m?a?4.5 ?m, 12 ?m?b?21 ?m, and 1.5 ?m?c-b?10 ?m hold, and loss increase resulting when the optical fiber is wound on a mandrel having a diameter of 20 mm is 0.

Abstract: A fiber optic includes a plurality of fibers each including a core made of core glass for propagating light and a cladding for covering an outer periphery of the core and made of cladding glass lower in refractive index than the core glass and an absorber glass arranged between the plurality of fibers and for absorbing light leaking from the plurality of fibers. The plurality of fibers are bundled and integrated. The absorber glass contains Fe3O4 being iron oxide crystals.

Abstract: A waveguide having a main body, an inner housing, and a wave receiving transmission path. The main body includes a body resin member, a concave groove extending in a longitudinal direction and a body metal plating layer over an entire surface of the concave groove. The inner housing has a resin cover member and an inner housing metal plating layer along an inner wall of the inner housing. The wave receiving transmission path is formed when the inner housing covers the concave groove of the main body when the main body and cover are assembled together.

Abstract: Adverse hydrogen aging limitations in multiply-doped optical fibers are overcome by passivating these optical fibers using a deuterium passivation process. This treatment essentially pre-reacts the glass with deuterium so that the most active glass sites are no longer available to react with hydrogen in service. Optical fibers of main interest are doped with mixtures of germanium and phosphorus. Optimum passivating process conditions are described.

Abstract: The invention relates to a Radiation Curable Secondary Coating composition for use on an Optical Fiber. The Radiation Curable Secondary Coating composition is a urethane-free Alpha Oligomer prepared by reaction of the following: (a) an acrylate compound selected from an alcohol-containing acrylate or alcohol-containing methacrylate compound, (b) an anhydride compound, (c) an epoxy-containing compound, (d) optionally an extender compound, and (e) optionally a catalyst. The invention also relates to a coated wire and to a coated optical fiber.

Abstract: A method for producing special supramolecular assemblies of colorants, in particular cyanine dyes, called J aggregates consists in depositing a monolayer of dendrimers on a support and subsequently in deposing cyanines in solution for forming the organized monolayer of J aggregates. The method can be used for producing a secondary light source for injecting light into a waveguide from a light energy received from a primary light source emitting at different wavelength. The secondary source, which consists of the J aggregates incorporating energy acceptors, can also be integrated into an optical device incorporating the waveguide.

Abstract: The present disclosure relates to a telecommunications cable having a layer constructed to resist post-extrusion shrinkage. The layer includes a plurality of discrete shrinkage-reduction members embedded within a base material. The shrinkage-reduction members can be made of a liquid crystal polymer. The disclosure also relates to a method for manufacturing telecommunications cables having layers adapted to resist post-extrusion shrinkage.

Abstract: An enhanced wavelength-converting structure is disclosed. The enhanced wavelength-converting structure includes a substrate, a wavelength-converting layer arranged next to the substrate, and a wavelength-selective reflecting layer arranged next to the wavelength-converting layer. The wavelength-converting layer converts the first light into the second light. A part of the second light radiating backward to the light source is further reflected toward the substrate by the wavelength-selective reflecting layer to form the enhanced second light by combining with another part of the second light radiating toward the substrate.

Abstract: A high-index contrast waveguide component is presented, which is based on the fast changing of the transmission properties of an optical waveguide by applying electric voltages, or by embossing electric currents. The waveguide consists of a high-refractive waveguide core surrounded by a low-refractive surrounding material, which at least area by area has electro-optical properties. By applying a voltage to completely or partially optically transparent electrodes, an electric field is generated having a strong overlap with the optical mode, being in interaction with it, and therefore changing the transmission properties of the waveguide. The transparent electrodes or supply line areas are laminar, connected at low resistance with conductor paths of high conductivity by means of structures continually repeated along the propagation direction. Thus, it is possible for example to very fast load the capacity being effective between the electrodes, and to thus achieve a high electric band width.

Abstract: A photosensitive resin composition which includes (A) a cyclic olefin; (B) at least either one of a monomer having a cyclic ether group and an oligomer having a cyclic ether group, having a refractive index different from that of the component (A); and (C) a photoacid generator, is provided.

Abstract: Embodiments of this invention include composite articles having specific optical properties. In one embodiment of this invention, a composite comprises high and low refractive index light transmitting material and surface relief features. In further embodiments, the composite comprises volumetric dispersed phase domains that may be asymmetric in shape. In one embodiment of this invention, the composite is an optical film providing light collimating features along two orthogonal planes perpendicular to the surface of the film. In another embodiment, the composite has improved optical, thermal, mechanical, or environmental properties. In further embodiments of this invention, the composite is manufactured by optically coupling or extruding two or more light transmitting materials, and forming inverted light collimating surface relief features or light collimating surface relief features.

Abstract: An optical element is disclosed which includes transparent superconductor material.

Abstract: A method for manufacturing an optical fiber in which a flow of a cooling gas within a cooling device is made to be an upward flow and the cooling gas is discharged to outside from an upper end of the cooling device by connecting the cooling device and a coating device in an airtight manner, and closing a flow of the cooling gas which flows toward a coating device within the cooling device using a meniscus of resin within the coating device. A temperature of the cooling gas is increased toward an upper portion of the cooling device from a lower portion of the cooling device by adjusting the flow rate of the cooling gas.

Abstract: In one of the embodiments there is disclosed a self healing optical fiber cable assembly comprising an elongated optical fiber core having a cladding layer, a buffer layer, a sealing layer that seals any microcracks or defects in the buffer layer, the cladding layer, and the optical fiber core, and, an outer protection layer, wherein an end of the outer layer is connected to a strain relief device to provide expansion protection to the cable assembly and to minimize strain on the cable assembly, and further wherein an end of the strain relief device is connected to an optical fiber module. The cable assembly may further comprise a constraining layer and/or a strengthening layer. There is also disclosed a method of making a self healing optical fiber cable assembly.

Abstract: A core glass and a fiber-optic light guide made from it and a cladding glass are described. The core glass is in the alkali-zinc-silicate system and contains, in Mol % on an oxide basis: 54.5-65, SiO2; 18.5-30, ZnO; 8-20, ? alkali metal oxides; 0.5-3, La2O3; 2-5, ZrO2; 0.02-5, HfO2; 2.02-5, ? ZrO2+HfO2; 0.4-6, BaO; 0-6, SrO; 0-2, MgO; 0-2, CaO; 0.4-6, ? alkaline earth metal oxides; 0.5-3, Li2O, but no more Li2O than 25% of the ? alkali metal oxides; >58.5, ? SiO2+ZrO2+HfO2. A molar ratio of Na2O/K2O is from 1/1.1 to 1/0.3. A molar ratio of ZnO to BaO is greater than 3.5.

Abstract: A resin composition for an optical material, which is excellent in heat resistance and transparency and is soluble in an aqueous alkali solution, a resin film for an optical material made of the resin composition, and an optical waveguide using the same are provided. The resin composition for an optical material includes: (A) an alkali-soluble (meth)acrylate polymer containing a maleimide skeleton in a main chain; (B) a polymerizable compound; and (C) a polymerization initiator. The resin film for an optical material is made of the resin composition for an optical material. The optical waveguide has a core part and/or a clad layer formed using the resin composition for an optical material or the resin film for an optical material.

Abstract: A photonic bandgap fiber includes a core and a cladding that surrounds the core. In this photonic bandgap fiber, high refractive index portions which have a refractive index higher than that of a medium of the cladding are provided in the cladding so as to form a triangular lattice structure with a lattice constant ?, and the refractive index of the core is higher than the refractive index of the medium of the cladding and lower than the refractive index of the high refractive index portion. The coupling length between the core and the high refractive index portion that is closest to the core is longer than the coupling length between adjacent high refractive index portions, or a periodic structure formed by the high refractive index portions is not provided around the entirely of the area along the circumference of the core.

Abstract: The present invention can provide an npin-type optical modulator that has a high withstand voltage and is easily fabricated. A semiconductor optical amplifier (10) according to an embodiment of the present invention is an npin-type semiconductor optical modulator in which layers are sequentially stacked, with a cathode layer (12-1) arranged on the substrate side, including at least a first n-type cladding layer (13-1), a p-type cladding layer (14), a core layer (17) and a second n-type cladding layer (13-2). In this semiconductor optical modulator, the p-type cladding layer (14) is electrically connected to an electrode (18-1) of the cathode layer. Accordingly, the accumulation of holes in the p-type cladding layer associated with light absorption in the npin-type optical modulator can be absorbed in the electrode on the negative side.

Abstract: Provided is an optical fiber for amplification and an optical fiber amplifier for use in L-band, in which optical fiber the increase of transmission loss and the degradation of hydrogen-resistant characteristic can be restrained. The optical fiber is basically made of silica glass and comprises: a core region doped with erbium and P element of 2 wt % to 5 wt % concentration, Ge not being added thereto; and a cladding region enclosing the core region and doped with F element, wherein the optical fiber has a gain at least in a wavelength range of 1570 to 1620 nm. The optical fiber amplifier comprises: the optical fiber; a pump light source for outputting the pump light capable of exciting a rare-earth element added to the core region of the optical fiber; and an optical coupler for introducing into the optical fiber the pump light having been output from the pump light source.

Abstract: The invention relates to a photonic crystal circuit comprising a guide produced in a photonic crystal membrane on the surface of a substrate and a mode adapter coupled to said guide, wherein the membrane includes a central point constituting the mode adapter having a section gradient as termination of said guide, said point being suspended so as to allow the propagation of modes in a symmetrical manner. It also relates to an optical system incorporating said circuit coupled to an optical fiber.

Abstract: An optical waveguide of the present invention is an optical waveguide in order to directly introduce light beams emitted from a light emitting element. In a core that is a waveguide through which light propagates, a concave part is formed that is a depression in a light incident end surface that is one side where light enters. Therefore, an optical waveguide is realized that can obtain a large optical coupling efficiency is possible by the operation of phase alignment in the concave part.

Abstract: A planar waveguide with a glass core and a crystalline cladding. In a specific embodiment, the core is doped preferably with Neodymium, Ytterbium, or Erbium. In the best mode, the core is athermal glass with a refractive index uniformity 10?6 or better and the crystalline cladding has a refractive index lower than that of the core by 10?4 to 10?3 with a refractive index uniformity of 10?4. The cladding has high transparency at pump and lasing wavelengths. The coefficient of thermal expansion of the cladding is close to that of the core. In illustrative embodiments, the cladding is Sapphire and the core is aluminate glass. In an alternative embodiment, the cladding is crystal quartz and the core—is phosphate glass. By utilizing different materials for the core and cladding, the properties of each are optimized.

Abstract: An optical fiber, comprising: (i) a core, (ii) a cladding surrounding the core, (iii) at least one stress member adjacent the fiber core and situated within the cladding, said stress member comprising silica co-doped with B and F.

Abstract: An optical memory includes an array of optical material and a beam scanning device. The optical material assumes first and second states, and incident light causes the optical material to transition from the first state to the second state. The beam scanning device selectively directs a received optical data signal across the array of optical material.

Abstract: A resin composition for an optical waveguide is provided, which comprises: an epoxy compound represented by the following general formula (1): wherein m is 1 or a positive integer, n is 1 or a positive integer, R and R? which may be the same or different are each represented by the following formula (2) or (3), wherein c is a positive integer of 1 to 3 and each one of c may be the same or different, and X is represented by the following formula (4): wherein a is an integer of 0 to 2, and b is a positive integer of 1 to 3, and satisfy a condition of a+b=3; and a photoacid generator. The resin composition has a lower viscosity, and is excellent in flexibility and moisture absorption resistance. An optical waveguide produced by employing the resin composition is also provided.

Abstract: A system in one general embodiment includes a waveguide structure comprising a core of an alloy of Group III-V materials surrounded by an oxide (which may include one or more Group III-V metals), wherein an interface of the oxide and core is characterized by oxidation of the alloy for defining the core. A method in one general approach includes oxidizing a waveguide structure comprising an alloy of Group III-V materials for forming a core of the alloy surrounded by an oxide.

Abstract: Embodiments of this invention include composite articles having specific optical properties. In one embodiment of this invention, a composite comprises high and low refractive index light transmitting material and surface relief features. In further embodiments, the composite comprises volumetric dispersed phase domains that may be asymmetric in shape. In one embodiment of this invention, the composite is an optical film providing light collimating features along two orthogonal planes perpendicular to the surface of the film. In another embodiment, the composite has improved optical, thermal, mechanical, or environmental properties. In further embodiments of this invention, the composite is manufactured by optically coupling or extruding two or more light transmitting materials, and forming inverted light collimating surface relief features or light collimating surface relief features.

Abstract: An adhesive layer attaining, in a single layer, both adhesiveness permitting direct attachment to a glass plate disposed on the front face of a display device and desired optical filter functions and hardly undergoing the change in spectral characteristics attributable to deterioration in a light absorbing agent, even during long-time use, particularly at high temperature under high humidity, as well as a composite filter using this adhesive layer. The adhesive layer has optical filter functions, containing a block copolymer having at least a specific triblock structure in its molecule and having a weight-average molecular weight of 50,000 or more and a molecular-weight distribution (Mw/Mn) of less than 1.5 and one or more light absorbing agents each having light absorption in a predetermined wavelength region, as well as a composite filter using this adhesive layer.

Abstract: Included among the many structures described herein are photonic bandgap fibers designed to provide a desired dispersion spectrum. Additionally, designs for achieving wide transmission bands and lower transmission loss are also discussed. For example, in some fiber designs, smaller dimensions of high index material in the cladding and large core size provide small flat dispersion over a wide spectral range. In other examples, the thickness of the high index ring-shaped region closest to the core has sufficiently large dimensions to provide negative dispersion or zero dispersion at a desired wavelength. Additionally, low index cladding features distributed along concentric rings or circles may be used for achieving wide bandgaps.

Abstract: A curable liquid resin optical fiber coating composition comprising 0.1 to 10 wt %, relative to the total weight of the composition, of an alkoxysilane compound (A) which does not contain a radically polymerizable functional group, and 0.01 to 1 wt %, relative to the total weight of the composition, of a hindered amine compound (B). This curable liquid resin composition produces a cured product that ensures a high n-value of the coated optical fiber and an excellent fiber strength after coating removal.

Abstract: A fiber-optic surveillance system (10) includes a fiber-optic sensor (15) comprising a serial array (15) of fiber-optic point-sensors (16), successive point-sensors being linked by a distributed fiber-optic sensor (18). The system allows the location of intruder events along the sensor to be determined, and provides a reduction in the incidence of false-alarms compared to prior art systems.

Abstract: Disclosed is a photocurable coating composition for an optical fiber. The photocurable coating composition can be used to produce an optical fiber having a low polarization mode dispersion (PMD) even by a non-spinning process. The photocurable coating composition includes a photopolymerizable urethane acrylate oligomer, a reactive monomer, a photoinitiator and an amine additive. Further disclosed is an optical fiber using the photocurable coating composition. The optical fiber has a polarization mode dispersion (PMD) of 0.1 ps/?km or less when produced by a non-spinning process.

Abstract: A multicomponent glass fiber having a doping concentration of 55%-85% (wt./wt.) of a rare-earth oxide is presented. The rare-earth oxide is selected from the group comprising: Pr2O3, Nd2O3, Pm2O3, Sm2O3, Eu2O3, Gd2O3, Tb2O3, Dy2O3, Ho2O3; Er2O3, Tm2O3, Yb2O3, La2O3, Ga2O3, Ce2O3, and Lu2O3. Additionally, an all-fiber isolator using highly rare-earth oxide doped fibers is disclosed.

Abstract: An optical fiber, which has a zero-material dispersion wavelength equal to or greater than 2 ?m, and a high nonlinear susceptibility ?3 equal to or greater than 1×10?12 esu, and uses tellurite glass having sufficient thermal stability for processing into a low loss fiber, employs a PCF structure or HF structure having strong confinement into a core region. This enables light to propagate at a low loss. The size and geometry of air holes formed in the core region, and the spacing between adjacent air holes make it possible to control the zero dispersion wavelength within an optical telecommunication window (1.2-1.7 ?m), and to achieve large nonlinearity with a nonlinear coefficient ? equal to or greater than 500 W?1 km?1.

Abstract: An optical fiber switch which may include first and second angled optical fibers having respective first and second end faces. Each of the first and second angled optical fibers may include a core having a core index of refraction, and a cladding surrounding the core and having a cladding index of refraction different than the core index of refraction. The optical fiber switch may further include a first index matching elastomeric solid layer having a proximal face coupled to the first end face and a distal face opposite the proximal face to be repeatably optically coupled to the second end face. The first index matching elastomeric solid layer may have an index of refraction profile matching an index of refraction of the core and the cladding. The optical fiber switch may also include at least one actuator for relatively moving the first and second angled optical fibers between a coupled position and an uncoupled position.

Abstract: A repeatable optical waveguide interconnection may include first and second optical waveguides having respective first and second end faces. Each of the first and second optical waveguides may include a core having a core index of refraction, and a cladding surrounding the core and having a cladding index of refraction different than the core index of refraction. The interconnection may further include a first index matching elastomeric solid layer having a proximal face coupled to the first end face, and a distal face opposite the proximal face to be repeatably optically coupled to the second end face. The first index matching elastomeric solid layer may have an index of refraction profile matching an index of refraction of the core and the cladding.

Abstract: The present invention discloses a method for fabricating an optical filter based on polymer asymmetric bragg couplers using holographic interference techniques, soft lithography, and micro molding, which comprises following steps: prepare a UV polymer with gratings; coating photo-resister film on the UV polymer, and exposed by UV light to obtain a photo-resister mold with two grooves each having gratings; coating diluted PDMS film on the photo-resister mold, and baking the PDMS film to obtain a PDMS mold having two waveguides with gratings; placing glass substrate over the PDMS mold to form a first tunnel; injecting a precure UV polymer into the first tunnel to from a cladding layer with two grooves having gratings pattern at its bottom; placing glass slide over the cladding layer and injecting a mixed UV polymer into the grooves to form waveguide cores; placing a second glass substrate over the cladding layer, and injecting UV polymer to form an upper cladding layer laminated with the cladding layer to obtai