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"Transmission of documents via telephone wires is possible in principle, but the apparatus required is so expensive that it will never become a practical proposition."
Dennis Gabor, British physicist
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| Number | Title | Issue Date |
| 7447387 | Electro-optical modulator with curving resonator An electro-optical modulator includes a structural substrate having insulating layer. A waveguide layer is on the insulating layer. A resonant layer on the insulating layer has a curving rim adjacent to the waveguide layer to form an optical coupling region. A gate ... | 11/04/2008 |
| 7232260 | Optical contact unit and optical plug A ferrule holder and a coil spring are provided in a main body formed in an approximately tube shape. A cable adaptor including a front opening part at a large diameter part is inserted from a back opening part into the main body having slits and. A first small diam... | 06/19/2007 |
| 7232263 | Optical communications module and substrate for the same A substrate on which cavities having floors and steps is provided. End faces of a light-emitting device, an optical component, and an optical transmission line are abutted on one of the cavity for positioning, and end faces of a light-receiving device, an optical co... | 06/19/2007 |
| 7231127 | Waveguide devices with low loss clads and tunable refractive indices Optical waveguide devices that include a polymer clad and a polymer core where the clad includes constitutional units contributed by (a) a monomer selected from the group consisting of a halocatechol diacrylate, a haloresorcinol diacrylate, and a haldhydroquinone di... | 06/12/2007 |
| 7231107 | Flexible wavelength selective switch fabric with arbitrary add and drop capability A flexible wavelength switch fabric may be implemented with multiple groups of reconfigurable blocking filters or with multiple multi-in, single out wavelength selective switches. The behaviors of reconfigurable blocking filters are individually settable, such as ch... | 06/12/2007 |
| 7231115 | Optical collimator-use lens component, optical collimator, and method of assembling these Disclosed is an optical collimator-use lens component including: a thin tube; a partially spherical lens that has been fixed in an inner hole of the thin tube so that an insertion portion having a predetermined length is left, is made of glass whose refractive index... | 06/12/2007 |
| 7221824 | Miniaturized focusing optical head in particular for endoscope An optical head for equipping the distal end of a flexible optical fiber bundle, designed to be urged into contact with an analyzing surface and including optical elements for focusing an excitation signal into a so-called excitation focal point located at a specifi... | 05/22/2007 |
| 7218798 | Optical deflection element and optical switch An optical deflection element is configured to include a prism electrode provided on an optical waveguide, a first photonic crystal structure provided forward of the prism electrode in a light traveling direction being a position after a light passes through the pri... | 05/15/2007 |
| 7218819 | Electrode systems for optical modulation and optical modulators An object of the invention is to provide an electrode system for optical modulation of an optical modulator to reduce a thickness “E” of an electrode required for velocity matching and for reducing a propagation loss in the electrode. A substrate 2 is mad... | 05/15/2007 |
| 7215850 | Waveguide plate and process for its production and microtitre plate A waveguide plate and a process for making the waveguide plate with a plate-like glass substrate (1), carrying a waveguiding layer (2), with at least one coupling grating on the surface carrying said waveguiding layer (2), which coupling grating... | 05/08/2007 |
| 7209607 | Optical space-switching matrix Optical switch matrix having at least an input matrix port defining at least a row of the matrix, a plurality of output matrix ports defining columns of the matrix, a plurality of switching elements, each one being disposed at the intersection of at least one row an... | 04/24/2007 |
| 7209622 | Resonator and light emitting device using the same Provided is a resonator using a three-dimensional photonic crystal. In the resonator, a range of choice of a resonance wavelength is wide and a desirable electric field distribution is obtained. The resonator according to the present invention includes a plurality o... | 04/24/2007 |
| 7206472 | Optical backplanes with integrated optical couplers and methods of making the same Optical backplanes providing integrated optical couplers to external optical fibers are disclosed, along with methods for making the same. An exemplary optical backplane has a first cladding layer disposed over the top surface of a substrate, and at least a first co... | 04/17/2007 |
| 7204648 | Apparatus for enhancing impedance-matching in a high-speed data communications system An impedance-matching electrical connection system, for use with high-frequency communication signals, includes a circuit board and a plurality of contact pads mounted on the circuit board. The contact pads are for coupling with a plurality of complementary connecto... | 04/17/2007 |
| 7203408 | Optical fibre An optical fibre having an NA-value of less than 0.34, which optical fibre is built up of a core and an enveloping protective coating, wherein the protective coating forms the outer layer of the optical fibre, which optical fibre has an NA-value ranging from 0.15 to... | 04/10/2007 |
| 7190854 | Methods for forming an array of MEMS optical elements An embodiment of the invention comprises an optical element capable of motion in at least one degree of freedom wherein the motion in at least one degree of freedom is enabled by serpentine hinges configured to enable the optical element to move in at least one degr... | 03/13/2007 |
| 7186038 | Telecommunications connector protective device A fiber optic connector assembly with a fiber optic connector mounted to a fiber optic cable and including a ferrule with an end face terminating the fiber. A plug is configured to fit about and engage the ferrule of the fiber optic connector to seal the end face fr... | 03/06/2007 |
| 7187822 | Fiber tip fluid output device A fiber tip fluid output device is provided for holding a fiber tip in an electromagnetic energy cutting apparatus and for directing water particles over a radiation delivery end of the fiber tip. The fiber tip fluid output device includes a generally cylindrical bo... | 03/06/2007 |
| 7184645 | Separator for optical-fiber tape A separator for an optical-fiber tape, the optical-fiber tape including a group of optical-fibers extending in parallel with each other, the separator including a supporting member configured to support a length of the optical-fiber tape along a first lateral edge t... | 02/27/2007 |
| 7184640 | Buried heterostructure device fabricated by single step MOCVD The device is an optoelectronic device or transparent waveguide device that comprises a growth surface, a growth mask, an optical waveguide core mesa and a cladding layer. The growth mask is located on the semiconductor surface and defines an elongate growth window.... | 02/27/2007 |
| 7184621 | Multi-wavelength transmitter optical sub assembly with integrated multiplexer A four-channel multi-wavelength transmitter optical sub assembly (TOSA) with an integrated multiplexer is described that includes four lasers, four collimating lenses, a multiplexer, an isolator, a focusing lens, and an optical fiber. The integrated multiplexer comp... | 02/27/2007 |
| 7184643 | Multiple-core planar optical waveguides and methods of fabrication and use thereof A multiple-core planar optical waveguide comprises: a substantially planar waveguide substrate; a lower waveguide core; an upper waveguide core; lower cladding between the substrate and the lower waveguide core; and upper cladding above the upper waveguide core. At ... | 02/27/2007 |
| 7181103 | Optical interconnect structures incorporating sets of diffractive elements An optical apparatus comprises an optical interconnect structure defining one or more optical source and receiver ports and one or more interconnect optical signal pathways connecting corresponding optical signal source and receiver ports. The optical interconnect s... | 02/20/2007 |
| 7177517 | Optical wave guide and the method of propagating light using the same In the upper face of a lower clad layer, a core trench is formed having a cross-sectional trapezoidal shape having a narrow bottom face and a wide upper face, a core is formed within the core trench, and an upper clad layer is formed at the upper face of the core fo... | 02/13/2007 |
| 7177496 | Optical spectral power monitors employing time-division-multiplexing detection schemes The present invention provides a method and apparatus for optical spectral power monitoring that employ a time-division-multiplexed detection scheme. The optical spectral power monitoring apparatus of the present invention uses a wavelength-dispersing means such as ... | 02/13/2007 |
| 7177509 | Large-scale image display apparatus using optical fiber The present invention discloses an image display apparatus using optical fiber in which moving images projected from a projector can be transferred to a screen through an optical fiber bundle with a high-definition image quality. An object of the present invention i... | 02/13/2007 |
| 7174066 | Method and an apparatus to detect signal failure on a per wavelength basis A method and an apparatus to provide optical equipment protection have been disclosed. In one embodiment, the method includes diverting a predetermined portion of each of a plurality of optical signals to a plurality of photonic detectors within a first optical netw... | 02/06/2007 |
| 7174062 | Optical device and method of manufacturing same An optical device comprising a first substrate in which V-grooves are made, four optical fibers, for example, having a reflective function and fixed in the V-grooves of the first substrate, an optical element bonded, through an adhesive layer, onto the optical path ... | 02/06/2007 |
| 7174063 | Colorless tunable dispersion compensator employing a planar lightwave circuit and a deformable mirror A colorless, waveguide-grating-router-based tunable dispersion compensator includes a planar lightwave circuit and a deformable mirror, optically coupled to each other by a plano-cylindrical glass lens such that a fast tuning speed and single-knob dispersion adjustm... | 02/06/2007 |
| 7171079 | Tunable dispersion compensator for an optical transmission system Provided is a tunable dispersion compensator based on an optical fiber grating for use in an optical transmission system. A tunable dispersion compensator comprises: a disk; a ring surrounding the disk, wherein the ring is rotatable independent of the disk; and a be... | 01/30/2007 |
| 7167611 | Transparent optical switch A transparent optical switch includes network management and performance monitoring using bit level information obtained by extracting selected information on a polling basis and analyzing the extracted information in the electrical domain. In one embodiment, a sign... | 01/23/2007 |
| 7164830 | Nonlinear optical fiber and optical signal processing apparatus using the optical fiber The present invention provides an optical fiber of a high nonlinear characteristic which has low dispersion values in a wide wavelength region in the vicinity of a wavelength of 1550 nm. An excellent optical signal processing apparatus is realized by using this opti... | 01/16/2007 |
| 7158706 | Optical fiber An optical fiber is produced so as to have ring-shape refractive index profile such that chromatic dispersion is between +6 ps/nm/km or larger and smaller than +15 ps/nm/km in 1550 nm wavelength, the transmission loss is smaller than 0.210 dB/km, effective cross sec... | 01/02/2007 |
| 7158696 | Transparent optical switch A transparent optical switch includes network management and performance monitoring using bit level information obtained by extracting selected information on a polling basis and analyzing the extracted information in the electrical domain. In one embodiment, a sign... | 01/02/2007 |
| 7156560 | Optic fiber alignment retainer assembly An alignment assembly (20) is provided for holding alignment sleeves that each aligns the ends of a pair of optic fiber ferrules (22, 26) projecting from two mating connectors (12, 14), which assures that the mating connectors will always be mat... | 01/02/2007 |
| 7153035 | Optical connector plug and optical connector Disclosed are an optical connector plug and an optical connector, wherein the grip member includes an inner barrel and an outer barrel, which are freely slid with respect to each other, the grip member having a reduction state where the inner barrel is accommodated ... | 12/26/2006 |
| 7155096 | Optical collimator for monomode fibers; monomode fiber with integrated collimator and method for making same An optical collimator for single mode fibers includes a fiber segment (S1) with mode expansion including an entry and an exit for a light beam. The entry of the fiber segment with mode expansion is on the side at which the core diameter is the smallest, and t... | 12/26/2006 |
| 7155071 | Device for Mach-Zehnder modulator bias control for duobinary optical transmission and associated system and method An electro-optical device includes an amplifier having an input receiving a data signal, a crossing adjustment input, and an output. The device includes a light source and a Mach-Zehnder modulator having a first input coupled to the output of the amplifier, an optic... | 12/26/2006 |
| 7155101 | Manufacturing method for high temperature fiber optic accelerometer A method of making a fiber optic accelerometer includes (a) drawing an optical fiber through a resin; (b) winding the resin coated fiber onto a disc mounted on an assembly having a central shaft; and (c) curing the resin-coated fiber. The optical fiber may be drawn ... | 12/26/2006 |
| 7139457 | Method for compensating modal dispersion in multimode optical fiber transmission path In an optical transmission path including multimode optical fibers, modal dispersion is reduced so that signal light can be transmitted at high speed and across a broad band, at low-cost and over a long distance. To reduce modal dispersion, when the transmission pat... | 11/21/2006 |
