Abstract: In various embodiments, chromophores are described that include novel electron acceptors, novel electron donors, and/or novel conjugated bridges that are useful in nonlinear optical applications. In some embodiments, the present invention provides chromophore architectures wherein a chromophore contains more than one electron acceptor in electronic communication with a single electron donor, and/or more than one electron donor in electronic communication with a single electron acceptor. Also described is processes for providing materials comprising the novel chromophores and polymer matrices containing the novel chromophores. Electro-optic devices described herein contain one or more of the described electron acceptors, electron donors, conjugated bridges, or chromophores.

Abstract: Systems and methods for manipulating light with high index contrast waveguides clad with substances having that exhibit large nonlinear electro-optic constants ?2 and ?3. Waveguides fabricated on SOI wafers and clad with electro-optic polymers are described. Embodiments of waveguides having slots, electrical contacts, and input waveguide couplers are discussed. Waveguides having closed loop structures (such as rings and ovals) as well as linear or serpentine waveguides, are described. Optical signal processing methods, such as optical rectification and optical modulation, are disclosed.

Abstract: The invention comprises a composite material comprising a host material in which are incorporated semiconductor nanocrystals. The host material is light-transmissive and/or light-emissive and is electrical chargetransporting thus permitting electrical charge transport to the core of the nanocrystals. The semiconductor nanocrystals emit and/or absorb light in the near infrared spectral range. The nanocrystals cause the composite material to emit/absorb energy in the near infrared (NIR) spectral range, and/or to have a modified dielectric constant, compared to the host material. The invention further comprises electro-optical devices composed of this composite material and a method of producing them. Specifically described are light emitting diodes that emit light in the NIR and photodetectors that absorb light in the same region.

Abstract: A method for the preparation of an optical waveguide device characterized in that it comprises a first step for forming a first resin film on a substrate provided thereon with a lower clad layer; a second step for patterning the first resin film into a shape of an optical waveguide to thus form a core layer; a third step for forming a second resin film by coating the surfaces of the lower clad layer and the core layer with a solution containing a material for forming the second resin film according to the spin-coating method in such a manner that the thickness of the resulting film as measured from the upper surface of the lower clad layer and as determined after drying ranges from 3 to 10 times the thickness of the core layer and then drying the coated layer; and a fourth step for removing the second resin film in such a manner that the thickness of the second resin film as determined from the upper surface of the lower clad layer is less than 3 times that of the core layer and that the second resin film thu

Abstract: The present invention relates to a polymeric composition of matter. The composition includes at least one polymer matrix and plurality of quantum dots distributed therein. The polymer may be a perfluorocyclobutane polymer having high optical transmission at telecommunications wavelengths. The quantum dots may include cap compounds to increase the solubility of the quantum dots in the composition. Typical cap compounds include aromatic organic molecules. Optical devices including waveguides may be fabricated from the polymeric compositions of the invention.

Abstract: A 3D Photonic Bandgap Device in SOI (NC#97719). The structure includes a substrate having a semiconductor layer over an insulator layer and a 3D photonic bandgap structure having at least one period operatively coupled to the substrate.

Abstract: Methods of fabricating nanoclusters, e.g., germanium nanoclusters, and/or a dielectric layer having the same are provided. The method may include forming a first silicon oxide layer on a silicon substrate; forming a germanium (GeO) layer on the silicon oxide layer; altering the germanium oxide (GeO) layer into a germanium dioxide (GeO2) layer and/or a first group of germanium (Ge) nanoclusters; and/or altering germanium dioxide (GeO2) into silicon dioxide (SiO2) such that a second group of germanium (Ge) nanoclusters may be formed. The nanoclusters, e.g., germanium nanoclusters, may have more homogeneous sizes and/or may be more evenly arranged the dielectric layer such that the nanoclusters, e.g., germanium nanoclusters, may be easily used in a semiconductor device.

Abstract: Provided is an optical transmission line in which the suppression of SBS and the achievement of other transmission characteristics can compatibly be attained. The optical transmission line is formed by connecting a first optical fiber and a second optical fiber, or by connecting a group of first optical fibers and a group of second optical fibers, in which the difference in Brillouin frequency shift therebetween is 200 MHz or more. In at least one of the first optical fiber and the second optical fiber, the transmission loss may be 0.32 dB/km or less at a wavelength of 1383 nm. In each of the first and second optical fibers, the mode field diameter may be not less than 8.2 ?m and not more than 9.8 ?m, the cable cutoff wavelength may be equal to or less than 1260 nm, and the zero dispersion wavelength may be not less than 1300 nm and not more than 1324 nm.

Abstract: A composite including a plurality of semiconductor nanocrystals distributed in a metal oxide matrix can be used as an optical amplifier, a waveguide or a laser.

Abstract: In general, in one aspect, the disclosure features a fiber waveguide having a waveguide axis, including a core extending along the waveguide axis and a confinement region extending along the waveguide axis surrounding the core. The confinement region includes a periodic structure along a radial direction extending from the waveguide axis and each period in the periodic structure includes a layer of a chalcogenide glass and a layer of a polymer.

Abstract: An optical fiber ribbon having a plurality of optical fibers connected by a radiation curable matrix and a method of manufacturing the same are disclosed. The optical fiber ribbon includes at least one preferential tear portion formed by a weakened portion in the matrix, the weakened portion of the matrix having a reduced cure level compared with the surrounding matrix material, thereby creating the weakened portion. In another embodiment, the optical fiber ribbon is formed of two subunits each having a plurality of optical fibers, wherein the subunits are connected by a secondary matrix.

Abstract: A doped barrier region included in an optical phase shifter is disclosed. In one embodiment, an apparatus according to embodiments of the present invention includes a first region of an optical waveguide and a second region of the optical waveguide. The second region of the optical waveguide includes a higher doped region of material and a lower doped region of material. An insulating region disposed between the first and second regions of the optical waveguide is also included. A first portion the higher doped region is disposed proximate to the insulating region. A dopant barrier region is also included and is disposed between the higher and lower doped regions of the second region of the optical waveguide.

Abstract: An optically amplifying waveguide that can have a gain having a small wave-length dependency in a wavelength range shorter than the C-band, and the like. The optical amplifier module 1 optically amplifies a signal lightwave that has a wavelength lying in a wavelength range of 1,490 to 1,530 nm and that has entered an input connector 11 to output the optically amplified signal lightwave from an output connector 12. An optical isolator 21, a WDM coupler 31, an Er-doped optical fiber (EDF) 50, a WDM coupler 32, and an optical isolator 22 are provided in this order on a signal lightwave-transmitting path from the input connector 11 to the output connector 12. A pump source 41 connected to the WDM coupler 31 and a pump source 42 connected to the WDM coupler 32 are also provided. In the EDF 50, at least one of the stimulated-emission cross section and the absorption cross section assumes a maximum value at the shorter-wavelength side of a peak at a wavelength range of 1.53 ?m.

Abstract: An optical fiber for transmitting light, said optical fiber having an axial direction and a cross section perpendicular to said axial direction, said optical fiber comprising: (1) a first core region comprising a first core material having a refractive index Nco,1; (2) a microstructured first cladding region surrounding the first core region, said first cladding region comprising a first cladding material and a plurality of spaced apart first cladding features or elements that are elongated in the fiber axial direction and disposed in the first cladding material, said first cladding material having a refractive index Ncl,1 and each said first cladding feature or element having a refractive index being lower than Ncl,1, whereby a resultant geometrical index Nge,cl, 1? of the first cladding region is lowered compared to Ncl,1; (3) a second core region surrounding said first cladding region, said second core region comprising a second core material having a refractive index Nco,2, and (4) a second cladding regio

Abstract: An optical device comprising a substrate, a porous layer laid on the substrate having a pore diameter smaller than the wavelength of light and a crystal layer laid on the porous layer showing a refractive index greater than that of the porous layer is presented. The optical device is manufactured by a method comprising a step of forming a porous layer having a pore diameter smaller than the wavelength of light on the surface of a substrate and a step of forming a crystal layer showing a refractive index greater than that of the porous layer on the porous layer. Since the porous layer is clad, light can be confined with ease.

Abstract: The present invention relates to optical confinements, methods of preparing and methods of using them for analyzing molecules and/or monitoring chemical reactions. The apparatus and methods embodied in the present invention are particularly useful for high-throughout and low-cost single-molecular analysis.

Abstract: A semiconductor electrooptic monolithic component comprising successively a first section capable of emitting light at a first wavelength and including a first active layer, a second section capable of absorbing light at the said first wavelength and including a second active layer, and a third section capable of detecting light at a second wavelength and including a third active layer. The component is characterized in that the second active layer is designed to ensure in the said second section an absorption higher than that which would be allowed by an active layer identical to the said first layer.

Abstract: An optical waveguide and a production method thereof that can provide increased production efficiency, improved workability, and/or production stability. According to non-limiting example embodiments a photopolymerizable resin composition comprising a fluorene derivative and a photoacid generator is coated over an under clad layer and then is dried, to form a resin layer having substantially no surface tack. The resin layer is exposed to light in the state of being contacted with a photo mask by a contact exposure method and then is developed, to form the resin layer into a pattern. Thereafter, the resin layer is cured to form a core layer and then an over clad layer is formed on the under clad layer in such a manner as to cover the core layer, to thereby produce an optical waveguide.

Abstract: An optical fiber includes a core, a cladding layer, and an overclad layer that has a plurality of nano-particles the core.

Abstract: A method for forming a gap (16) of a width (d) which meets selected tolerance limits includes forming sidewalls (80, 82) in a microstructure, the sidewalls defining a gap (16) therebetween. The gap has a width defined between the sidewalls. The width of the gap between the sidewalls is determined. Where the determined width of the gap is below the selected tolerance limits for the width of the gap, the sidewalls are consumed to form a gap which meets the selected tolerance limits. The gap may be incorporated in a waveguide device (10) of a microswitch (100) and selectively connect input and output waveguides (130, 132).

Abstract: An optical fiber includes a core, and a cladding layer that has a plurality of nano-particles around the core.

Abstract: A photonic crystal comprises a matrix constituting said three-dimensional periodic structure, a first lattice formed in said matrix by first spherical voids having a uniform first diameter, said first spherical voids forming a face-centered cubic lattice, and a second lattice formed in said matrix by second spherical voids having a uniform second diameter smaller than said first diameter, said second spherical voids occupying interstitial sites of said first spherical voids.

Abstract: An optical delay circuit includes a plurality of defect waveguides arranged in parallel and including a line-shaped defect in a periodic refractive-index distribution structure of a photonic crystal. The defect waveguides include a multiplexing/demultiplexing portion in which the defect waveguides are arranged close to each other to multiplex and demultiplex light; and an optical delay portion extending from the multiplexing/demultiplexing portion, in which the defect waveguides are arranged with a predetermined distance therebetween so that light propagating in any of the defect waveguides does not interfere with light propagating in the other defect waveguides. Each of the waveguides has a different configuration.

Abstract: Disclose is a photonic crystal structure comprises atomic dielectric pillars having a refractive index distribution and a structure which are both mirror-symmetrical in a thicknesswise direction of the photonic crystal. The atomic pillars are arrayed in a two-dimensional lattice pattern to form a dielectric pillar lattice. The dielectric pillar lattice is disposed within a surrounding dielectric having a uniform or substantially uniform refractive index distribution. An organic resin which serves as part of surrounding dielectric is disposed in an asymmetrical position in a thicknesswise direction of the photonic crystal.

Abstract: The present invention is concerned with an optical cable with improved tracking resistance comprising at least one optical fiber and an outer sheath which comprises a polymeric material, characterized in that the polymeric material forms a matrix for the sheath and consists of a multimodal olefin polymer obtained by a coordination catalyzed polymerization, and in that the total composition of the sheath comprises 15–40% by weight of a metal hydroxide, preferably magnesium hydroxide and/or aluminium hydroxide, and 0.01–0.9% by weight of carbon black.

Abstract: The present invention provides a light-enhancing component and a fabrication method thereof by using the focused-ion-beam. In the present invention, the surface plasmon polariton structure is coated on the surface of the optical fiber so as to form the light-enhancing component. When the light passes through the optical fiber, the luminous flux transmitted through the aperture on the surface plasmon polariton is enhanced, and the light beam smaller than the diffraction limitation can be transmitted to the far-field, i.e. the nano-optic sword is formed. The light-enhancing component of the present invention can be used for the optical data storage, the optical microscopy, the biomedical detections and the lithography to perform the extra optical resolutions beyond the diffraction limitation.

Abstract: Ceramics comprising (i) at least one of Nb2O5 or Ta2O5 and (ii) at least two of (a) Al2O3, (b) Y2O3, or (c) at least one of ZrO2 or HfO2. Embodiments of ceramics according to the present invention can be made, formed as, or converted into optical waveguides, glass beads, articles (e.g., plates), fibers, particles (e.g., abrasive particles), and thin coatings.

Abstract: This invention relates to a copolymer prepared by polymerizing at least a vinyl compound (A) which gives a homopolymer with a refractive index of 1.50 or more, a fluoroalkyl (meth)acrylate (B) represented by the following formula (1) and methyl methacrylate (C), wherein a weight ratio of monomer (A) component/monomer (B) component ((A)/(B)) in the copolymer is within the range of 0.2 to 1; as well as a plastic optical fiber and a plastic optical fiber cable comprising a clad made of the copolymer. This invention can provide a plastic optical fiber and a plastic optical fiber cable exhibiting a reduced transmission loss, minimizing increase in a transmission loss even when being held as a bobbin-wound form, exhibiting a reduced bend loss and can transmit a wide-band data. (In the above formula, X represents H or CH3; and Rf represents fluoroalkyl having 7 to 14 carbon atoms both inclusive and 13 to 25 fluorine atoms both inclusive.).

Abstract: Ceramics comprising (i) at least one of Nb2O5 or Ta2O5 and (ii) at least two of (a) Al2O3, (b) REO, or (c) at least one of ZrO2 or HfO2. Embodiments of ceramics according to the present invention can be made, formed as, or converted into optical waveguides, glass beads, articles (e.g., plates), fibers, particles (e.g., abrasive particles), and thin coatings.

Abstract: The invention relates to polymer compositions which enable thermooptic control of signal attenuation in the ultraviolet, visible and near infrared (NIR) regions of the electromagnetic spectrum, and devices incorporating such compositions. The compositions are derived from polymer mixtures which exhibit a cloud point phase transition at a temperature in the range of a thermooptically controlled device such as a programmable waveguide attenuator, a programmable neutral density filter, or an optically absorbent switch. An especially preferred embodiment of the invention comprises a mixture of a high molecular weight chlorotrifluoroethylene fluid and a wax with an “ON-state” insertion loss of below 0.1 dB/cm and an extinction ratio of 22 dB/cm in the 1550 nm NIR telecommunication band.

Abstract: A process for forming a light guide plate with a reflection film includes: (a) providing a light guide plate (30), which has a light input surface (303) with light incident portions (3032), a bottom surface (304), a light output surface (301), and side surfaces (302); (b) attaching protection film (32) on the light incident portions and the light output surface; (c) providing a reflection solution; (d) dipping the light guide plate in the reflection solution; (e) removing the light guide plate from the reflection solution, and solidifying a portion of the reflection solution remaining on the light guide plate to thereby form a reflection film; and (f) removing the protection film to expose the light incident portions and the light output surface. Because the reflection film is directly attached to the light guide plate, there is no gap and no attendant leakage of light.

Abstract: The present invention relates to a radiation-curable solvent-free coating composition for optical fiber having a radiation-curable urethane (meth)acrylate oligomer comprising an alkyd backbone,a reactive diluent, and a photoinitiator, and optionally an additive.

Abstract: Jacket tubes of synthetically produced quartz glass as a semi-finished product for producing an outer cladding glass layer of an optical fiber are generally known. The invention relates to an improvement of a jacket tube in terms of inexpensive producibility and of suitability as a semi-finished product for optical fibers having a low optical attenuation. According to the invention this object is achieved by a jacket tube in which the quartz glass has a content of metastable OH groups of less than 0.05 wt ppm and a content of anneal-stable OH groups of less than 0.05 wt ppm.

Abstract: An optical fiber having at least one epoxidized polyolefin based polymer coating. The coating is formed from a crosslinkable composition having (a) at least one epoxidized polydiene oligomer having a first and a second end, the oligomer having at least one hydrocarbon chain that is substantially free of ethylenic double bonds, at least one epoxide group at the first end and at least one reactive functional group at the second end; (b) at least one hydrogenated polydiene oligomer having at least one reactive functional group capable of reacting with the epoxide groups; and (c) at least one photo-initiator. Preferably, the coating is a primary coating coated with a secondary coating.

Abstract: An optical element is formed from a molded body which is formed using an impact consolidation phenomenon in which mechanical impact is applied to ultra fine fragile particles which are supplied onto a substrate so that the ultra fine fragile particles are pulverized and bonded to each other. In the optical element, d6/?4<4×10?5 nm2 holds, in which d (nm) represents the average radius of a part of the molded body, such as a pore (void) or a different phase, having a refractive index different from that of a primary component of the molded body, and in which ? (nm) represents the wavelength of light transmitting through the molded body.

Abstract: An optically active linear single polarization device includes a linearly birefringent and linearly dichroic optical waveguide (30) for propagating light and having single polarization wavelength range (48). A plurality of active dopants are disposed in a portion (34) of the linearly birefringent and linearly dichroic optical waveguide (30) for providing operation of the waveguide in an operating wavelength range (650) for overlapping the single polarization wavelength range (48).

Abstract: The invention is directed to chalcogenide glasses suitable for use in plastics forming processes. The glasses have the general formula YZ, where Y is Ge, As, Sb or a mixture of two or more of the same; Z is S, Se, Te, or a mixture of two or more of the same; and Y and Z are present in amounts (in atomic/element percent) in the range of Y=15–70% and Z=30–85%. The chalcogenide glasses of the invention have a 10,000 poise temperature of 400° C. and are resistant to crystallization when processed at high shear rates at their 10,000 poise temperature. The glasses can be used to make, among other items, molded telecommunication elements, lenses and infrared sensing devices.

Abstract: A rare earth containing glass nominally based on the ternary P2O5—WO3—Na2O-Ln2O3 compositional space, with WO3>30-65 mole %, Na2O 15-35 mole %, P2O5 5-65 mole %, Ln2O3 (Ln=one or more cations selected from lanthanum or any of the rare earth oxides) up to the limit of solubility; with optional additives, MoO3 being a preferred additive, that can be employed alone or in combination at levels up to 15 mole %.

Abstract: Optical apparatus including an optical waveguide including a hollow core formed lithographically. The optical waveguide may include a cladding with a reflective surface deposited thereon. The reflective surface may include a metallic coating, a multilayer dielectric coating, a multi-dimensional photonic crystal, and/or may be doped with a lasing material. The multilayer dielectric coating may include only dielectric layers or a combination of dielectric and metal layers.

Abstract: A method and apparatus for improving the sensing of a physical parameter using a distributed optical waveguide and scattering. The optical waveguides have improved scattering efficiency and/or improved light capturing capability provided by multi-cladding layers and a tightly confining core waveguide. The core can be highly doped with a material such as germanium to improve scattering. The cladding layers provide a multi-mode waveguide for capturing scattered light. Such optical waveguides are useful in systems that rely on Rayleigh, Raman and Brillouin scattering.

Abstract: The present invention relates to an analog optical transmission system having a construction for expanding an analog transmittable distance. The analog optical transmission system includes: a light transmitter outputting analog optical signals such as image signals modulated in accordance with electrical signals multiplexed on a frequency domain; a transmission line including a SMF of 20 km or less in the total length; and a light receiver. A dispersion compensating fiber compensating for the chromatic dispersion of the transmission line is arranged on the transmission line, and the dispersion compensating fiber satisfies one of the first condition that the chromatic dispersion is set at ?250 ps/nm/km or less and a length is set at 1.1 km or less, and the condition that the chromatic dispersion is set at ?330 ps/nm/km or less and a length is set at 1.2 km or less. Optical suppressing devices reducing the MPI noise are arranged at the end portion of the dispersion compensating fiber.

Abstract: A structured material is disclosed with magneto-gyrotropic characteristics including at least one continuous structurally-chiral material. The structured material has an electric permittivity and a magnetic permeability at least one of which varies within the structured material along a first direction in a repetitious fashion wherein a repetition unit includes a chiral component and is at least 25 nm in length. The structured material exhibits non-reciprocal electromagnetic wave propagation velocity characteristics along a second direction that includes a non-zero component along the first direction.

Abstract: A low attenuation optical waveguide fiber having medium dispersion is disclosed. The core and the cladding are selected to provide a spectral attenuation at 1550 nm of less than 0.195 dB/km. The optical fiber exhibits an effective area of greater than about 60 ?m2 at a wavelength of about 1550 nm, a dispersion slope of less than 0.07 ps/nm2/km at a wavelength of about 1550 nm, and a zero-dispersion wavelength of less than about 1500 nm.

Abstract: Optical and optoelectronic articles incorporating an amorphous diamond-like film are disclosed. Specifically, the invention includes optical or optoelectronic articles containing an amorphous diamond-like film overlying two or more proximate substrates, and to methods of making optical and optoelectronic articles. In certain implementations, the film comprises at least about 30 atomic percent carbon, from about 0 to about 50 atomic percent silicon, and from about 0 to about 50 atomic percent oxygen on a hydrogen-free basis. Another embodiment includes optical or optoelectronic articles containing an amorphous diamond-like film that is further coated with a metallic or polymeric material for attachment to a device package.

Abstract: The present invention concerns a method of manufacturing a graded index plastic optical fiber having an index that varies continuously between the center and the periphery of the fiber, from at least one polymer P and at least one reactive diluent D1 to allow the refractive index of said fiber to be varied.

Abstract: Provided is a single-mode optical fiber that propagates an optical signal at a wavelength of 1310 nm, in single-mode operation; has a mode field diameter of 6.6 ?m or more at the wavelength of 1310 nm; and a macro bending loss of at most 0.1 dB/10 turns with a bending radius of 7.5 mm at a wavelength of 1650 nm.

Abstract: A fused optical fiber optical device system comprises at least one optical component comprising optical fibers and at least one other optical component with which light transmitted in the optical fibers interacts, wherein the optical fiber comprises a core glass of the following composition: La2O3 1–23 mole %, ZrO2 1–10 mole %, WO3?2.5 mole %, ZnO 1–15 mole %, BaO 0–9 mole %, B2O3 20–70 mole %, Ta2O5 0–3 mole %, CaO 0–7 mole %, PbO 6–35 mole %, SiO2 0–40 mole %, As2O3 and/or Sb2O3 0–0.1 mole %, Nb2O50–3 mole % and Al2O3 0–8 mole %. The core glass is essentially free of CdO, has a refractive index nd of at least 1.8 and a CTE of ?about 74×10?7.

Abstract: In order to supply the optical fiber for attenuating optical signal enable the attenuation amount to become flat in wide wavelength scope, simultaneously adding at least two kinds of dopants for attenuating optical signal over the core and the cladding of the optical fiber. Then, properly adjusting the kind and the concentration of dopants for manufacturing the optical fiber 1 for attenuating optical signal; simultaneously adding the dopant enabling the absorption of optical signal to increase with the wavelength become long and the dopant enabling the absorption of optical signal to decrease with the wavelength become long. As the dopant, it is desired to select at least two kinds of transitional metals from Co, Ni, Cr, V, Fe, Mn, Tb and Tm. Further, as the doped area, it is desired to dope the 6 times of the center portion of the core from the center of the core.

Abstract: Disclosed is an optical fiber having a core of SiO2 doped with fluorine and an alkali metal oxide dopant. The alkali metal oxide is selected from the group consisting of K, Na, Li, Cs and Rb and is provided in amount of at least 20 ppm wt. %. The fiber has an inner cladding surrounding the core, which also includes fluorine. A relative refractive index of the inner cladding (?2%), measured relative to pure silica, is preferably between ?0.39% and ?0.7%. The fiber preferably exhibits attenuation at 1550 nm of less than or equal to 0.178 dB/km.

Abstract: A photonic crystal and a producing method thereof are provided. The photonic crystal includes at least two media of different refractive indices formed on a semiconductor substrate. One of the media is periodically arranged in another one of the media. The photonic crystal has a cleaved surface on its side. The directions of primitive translation vectors representing the periodic arrangement directions of the one medium are at desired angles with the cleaved surface. Preferably, the direction of at least one of the primitive translation vectors is in parallel with the cleaved surface.