Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 7899287 | Optical branching-coupling device, and manufacturing method and optical module of the same The optical branching-coupling device having a self-written optical waveguide core is formed without using half mirrors. In the optical branching-coupling device, three POFs are inserted into a housing having an approximately D-shaped sidewall. An approximately semi... | 03/01/2011 |
| 7840108 | Light branching optical waveguide Provided is a light branching optical waveguide including: at least one incident light waveguide (A) optically connected to one end of a multi-mode optical waveguide; and output light waveguides (B) larger in number than the incident light waveguide (A) optically co... | 11/23/2010 |
| 7760975 | Shared light pipe for message indicator and light sensor A shared light pipe is set forth for transmitting light generated by a message waiting LED in a mobile communication device, in one direction, and transmitting ambient or surrounding light, in an opposite direction, to a light sensor for controlling a display backli... | 07/20/2010 |
| 7742666 | Optical beam splitter An optical beam splitter includes an input waveguide, two or more branching arms, two or more fan-out arms, and two or more output waveguides. The input waveguide receives an input light beam. The two or more branching arms are coupled to the input waveguide at a se... | 06/22/2010 |
| 7664353 | Optical waveguide structure including at least first, second and third waveguides and coupling waveguide The present invention disclosed is an optical waveguide structure that has a first waveguide provided with the opposite ends A and B, a second waveguide with the opposite ends C and D, a third waveguide with the opposite ends E and F, and a coupling waveguide having... | 02/16/2010 |
| 7657139 | Y-junction reflector tunable delay or resonator waveguide devices The invention provides tunable delay or resonator devices in an electro optical substrate. Signals in at least one waveguide in the electro optical substrate pass through Y-junction reflectors which direct signals from one branch of the waveguide back into another b... | 02/02/2010 |
| 7499613 | Y branch circuit and method for manufacturing the same A Y branch circuit according to the present invention includes; a under clad; a circuit core, formed on the under clad and having a main core and two branch cores, connected to the main core, and an over clad that embeds the circuit core. The main core and the two b... | 03/03/2009 |
| 7492992 | Bi-directional PLC transceiver device An integrated bi-directional transceiver device for multiple wavelength optical signals that has a high level of wavelength isolation at the receivers of the device and low cross-talk of light between an external laser transmitter and the receivers. A WDM planar lig... | 02/17/2009 |
| 7457498 | Optical waveguide structure An optical waveguide structure has a single port on one input/output side, a plurality of ports on another input/output side and an S-curve optical waveguide portion arranged on the outermost side of the waveguide structure and including a first circular arc optical... | 11/25/2008 |
| 7443591 | Homogenizing optical beam combiner An optical homogenizing and combining apparatus, comprises a one piece, hollow, tubular body having a first input leg, a second input leg and an output leg, each leg having a polygonal cross-section and highly reflective interior surfaces in accordance with an embod... | 10/28/2008 |
| 7444050 | S-shaped curved optical waveguide and optical device The present invention relates to a curved optical waveguide which is free of any axis-deviation structure in the middle of the waveguide and which has a sigmoidal core shape, wherein the curvature thereof at one end is zero and the curvature thereof at the other end... | 10/28/2008 |
| 7433561 | All-optical phase, wavelength, and polarization-insensitive wavelength converters An all-optical device for wavelength conversion, reshaping, modulating, and regenerating. The device includes a splitting device having first, second, third, and fourth terminals and a nonlinear element. The third and fourth terminals are associated with an optical ... | 10/07/2008 |
| 7428356 | Homogenizing polygonal shape inverted “Y” optical beam splitter A polygonal shape inverted “Y” optical beam splitter for splitting input light into two, equal intensity, homogenous light beams. A one-piece hollow tubular body is provided having a first, second, and third leg. Each leg has a polygonal cross-section and a high... | 09/23/2008 |
| 7400801 | Bidirectional HDCP module using single optical fiber and waveguide combiner/splitter Embodiments provide single fiber bidirectional HDCP modules. A signal fiber module includes at least one laser and at least one detector and a waveguide combiner/splitter. An optical fiber is used as a cylindrical lens in order to partially collimate in the vertical... | 07/15/2008 |
| 7391954 | Attenuated optical splitter module A compact optical splitter module is disclosed. One type of compact optical splitter module is a planar attenuated splitter module that includes a branching waveguide network having j≧1 50:50 splitters that form up to n≦2j output waveguides having ass... | 06/24/2008 |
| 7386197 | Method and apparatus for wafer level testing of integrated optical waveguide circuits A method of testing a planar lightwave circuit is achieved by coupling an optical probe to the planar lightwave circuit. In one embodiment, a second probe is used in combination with the first probe to test the planar lightwave circuit by sending and receiving a lig... | 06/10/2008 |
| 7386214 | Homogenizing optical beam combiner An optical homogenizing and combining apparatus includes a one piece hollow tubular body having a first and second input legs and an output leg, each leg having a polygonal cross-section and a highly reflective interior surface, the first input leg being configured ... | 06/10/2008 |
| 7373025 | Waveguide-type optical device In the present invention, for example with regards to a Mach-Zehnder type LN modulator which uses a Z-cut LN substrate, by providing a step by forming an etching part on the surface of the LN substrate, and forming an optical waveguide so as to position a pair of br... | 05/13/2008 |
| 7362933 | Optical branching unit In an optical branching unit according to the invention, the cross section shape in an area of a front stage to branch to two output waveguides in the optical branch is a rectangle or a non-circle with different vertical-to-horizontal ratio, including an area that t... | 04/22/2008 |
| 7362929 | Optical switch An optical switch changes over transmission paths of an optical signal by a refractive index change. The optical switch has an optical waveguide layer having an optical waveguide whose output path of an optical signal branches into two, and reflection diffusing ditc... | 04/22/2008 |
| 7359598 | Surface plasmon optic devices and radiating surface plasmon sources for photolithography Disclosed is a surface plasmon optic device that has a periodic array of apertures in a dielectric substrate and a metal film formed on the dielectric substrate and emits light from metal-air interface. The surface plasmon optic device includes a surface plasmon gen... | 04/15/2008 |
| 7356227 | Optical switch, optical modulator and wavelength variable filter An optical switch, an optical modulator, and a wavelength variable filter each have a simple configuration, which requires only a low driving voltage, which is independent of polarization, and which can operate at high speed. An optical switch includes a 3-dB couple... | 04/08/2008 |
| 7352934 | Three dimensional high index optical waveguides bends and splitters An optical cavity structure for bending optical signals is provided. The optical cavity structure includes an input port for receiving input optical signals from a first waveguide. The optical cavity structure also includes an interconnecting structure that receives... | 04/01/2008 |
| 7352967 | Data transmission system A data transmission system includes subscriber units and a central office unit which are interconnected via optical fibers. The central office unit multiplexes a video signal with signals other than the video signal to deliver them to the multiple subscriber units. ... | 04/01/2008 |
| 7343071 | Optical component and a method of fabricating an optical component The invention relates to a method of manufacturing an optical component (800). It also relates to a branching unit and to a method of reducing insertion loss in an optical branching unit. It further relates to a method of reducing stress induced polarization ... | 03/11/2008 |
| 7343070 | Optical splitter with tapered multimode interference waveguide A 1×2 splitter design having low loss is described. The splitter has a non-adiabatic tapered waveguide (22) connected between a substantially single-mode input waveguide (20) and two output waveguides (24, 26). The non-adiabatic tapered wavegui... | 03/11/2008 |
| 7340116 | Optical switch, optical modulator and wavelength variable filter An optical switch, an optical modulator, and a wavelength variable filter each have a simple configuration, which requires only a low driving voltage, which is independent of polarization, and which can operate at high speed. An optical switch includes a 3-dB couple... | 03/04/2008 |
| 7333708 | Multi-port optical connection terminal A multi-port optical connection terminal for use as a branch point in a fiber optic communications network at a distance from a mid-span access location provided on a distribution cable having a plurality of optical fibers. The multi-port terminal includes a base an... | 02/19/2008 |
| 7330620 | Low loss funnel-type PLC optical splitter with input cladding mode absorption structure and/or output segmented taper structure A funnel-type planar lightwave circuit (PLC) optical splitter having an input optical waveguide, a slab waveguide receiving the input optical signal from the input optical waveguide, and output waveguides projecting from the slab region. The region connecting the sl... | 02/12/2008 |
| 7329050 | Tapered, single-mode optical connector Disclosed herein are an optical device, such as a connector or mode enlarger, and a method of fabricating the device. The disclosed device includes an optical medium having a first face for, e.g., permanent attachment to a waveguide, a second face for, e.g., a non-p... | 02/12/2008 |
| 7330619 | Laser and photodetector coupled by planar waveguides An optical apparatus comprises: a waveguide substrate; three planar optical waveguides formed on the substrate, each comprising a transmission core and cladding; a laser positioned to launch its optical output to propagate along the first waveguide; a photodetector ... | 02/12/2008 |
| 7327915 | Integrated optical structure sensitive to the energy radiated into the cladding of a planar lightwave circuit The described integrated planar optical structure comprises a principal waveguide having a core and a cladding that define a first light path ad means sensitive to the light radiated into the cladding comprising at least one secondary waveguide having a core and a c... | 02/05/2008 |
| 7324727 | Planar lightwave circuit having optical filter A planar lightwave circuit having an optical filter, which comprises: a first waveguide; a second waveguide separated from the first waveguide, in which the width of a first cross-section opposite to the first waveguide is wider than that of a second cross-section o... | 01/29/2008 |
| 7322421 | Fiber optic deployment apparatus and method A head member having a piston provided thereon is connected to an elongate tube such as a micro-tube. The micro-tube contains one or more optical fibres, preferably suspended therein by a protective fluid such as a scavenging gel. The head member is preferably inser... | 01/29/2008 |
| 7315676 | Optical modulator, optical waveguide device and acousto-optic tunable filter apparatus The invention provides an optical modulator wherein appearance of radiation mode light can be suppressed to improve performances as a device. The optical modulator includes a multiplexing waveguide which in turn includes two input waveguides to which propagation lig... | 01/01/2008 |
| 7313297 | Wavelength multi/demultiplexer Disclosed is a wavelength multi/demultiplexer for separating two wavelength bands with a narrow wavelength spacing. A dielectric multilayer filter is provided in an intersection portion where two optical waveguides intersect each other and separates incident light t... | 12/25/2007 |
| 7313293 | Optical power monitoring apparatus, optical power monitoring method, and light receiving device An optical power monitoring apparatus according to an aspect of the present invention has an input optical waveguide, a light receiver, and an output optical waveguide. The input optical waveguide has a light entrance end and a light exit end. The input optical wave... | 12/25/2007 |
| 7310453 | Optical modulator An optical modulator restricted in a photorefractive phenomenon caused by a stray light in an optical modulator, and improved in the quenching ratio characteristics of a signal light. The optical modulator comprises a substrate consisting of a material having an ele... | 12/18/2007 |
| 7308174 | Optical device including a filter member for dividing a portion of signal light When a surface of a filter member on a multilayer film is defined as a first surface, a surface of the filter member on an quartz substrate as a second surface, an inner wall surface of a slit which faces the first surface of the filter member as a first inner wall ... | 12/11/2007 |
| 7305163 | Fiber optic phototherapy devices including LED light sources Fiber optic phototherapy devices include fiber optic light emitters having fiber optic end portions at one or both ends that may be separated into a plurality of groups of end portions that receive light from one or more light emitting diodes (LEDs). The fiber optic... | 12/04/2007 |
