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Topic: Optical device

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US06896421-20050524.html an optical device clamp, said optical device clamp advanced upon said optical device section of the optical fiber connector clamp; and an optical fiber connector clamp comprising a test section and an optical device section; Method and apparatus for assembly of an optoelectronic device with an optical connector www.uspto.gov /web/patents/patog/week21/OG/html/1294-4/US06896421-20050524.html   (118 words)

Research N junction based power device structure and thus triggering a switching power semiconductor device through direct optical control using one single optical source of monochromatic wavelength. This idea is extendable to different device structure, e.g., vertical optically triggered power transistor having drain and source electrodes at the back and front side of the wafer respectively or to different mode of operation, e.g., enhanced current conduction by base conductivity modulation by incorporating another The core concept of the present innovation is to use photogeneration (generation of electron-hole pairs by shining light of suitable wavelength on a semiconductor) and recombination mechanism to trigger a power semiconductor device from off-state to on-state and vice versa without any electrical signal applied to its controlling gate terminal. www.ece.uic.edu /~tsarkar/research.html   (875 words)

Packet Systems News Early in 2004, Metrobility Optical Systems introduced an Ethernet Network Interface Device (NID) that adheres to the IEEE 802.3ah draft standard for Ethernet in the First Mile (EFM) and conforms to the Metro Ethernet Forum's Services Model for E-Line or point-to-point services. Metrobility Optical Systems has expanded its E-Services Network Interface Device (NID) product line to include 10/100Mbps support as well as the ability to support rate limiting, Q-in-Q tagging and four service classes for traffic prioritization. Metrobility's new R821 10/100 E-Services NID consists of a 10/100BASE-T user port and 100Mbps optical network port to create a secure customer premise equipment (CPE) demarcation point for point-to-point optical Ethernet services in metro area networks. www.convergedigest.com /PacketSystems/packetsysarticle.asp?ID=13466   (590 words)

Computer network having a single electrically continuous bi-directional bus - Patent 4435764 First optical isolator 35 include includes a light emitting diode 51 which is coupled by a pair of leads 53 and 55 to the output of receiver 45 and a gate circuit 57 which is coupled to data processing device 33 through a pair of leads 59 and 61. Thus light emitting diode 51 in second optical isolator 37 is connected to data processing device 33 by a pair of leads 63 and 65 and gating circuit 57 is connected to the input of transmitter 43 by a pair of leads 67 and 69. The data processing device and the first optical isolator are powered by a first power supply which is connected and grounded to the AC mains while the transceiver and second optical isolator are powered by a second power supply which is connected to the neutral conductor on the bus and is floating. www.freepatentsonline.com /4435764.html   (2622 words)

86347.011115&ELEMENT_SET=DECL A nonlinear optical device as claimed in claim 1 or claim 2, the waist having a diameter smaller than the diameter at which the net group-velocity dispersion D that would be experienced by light at a wavelength within + 100 nm of the centre wavelength of the input light is anomalous. A nonlinear optical device as claimed in any preceding claim, the waist having a diameter smaller than the diameter at which the net group-velocity dispersion D experienced by the input light is anomalous. A nonlinear optical device as claimed in claim 29, in which at least one of the fibres is dissimilar from at least one other fibre in the coupler so that the coupler is asymmetric. www.wipo.int /cgi-pct/guest/getbykey5?KEY=01/86347.011115&ELEMENT_SET=DECL   (4033 words)

World Intellectual Property Organization The auxiliary optical device of Claim 1, in combination with a telescopic gun sight optical device to which the auxiliary optical unit is attached in a quickly-attachable/detachable manner. The auxiliary optical unit according to Claim 3, wherein said afocal teleconverter lens system, laser range finder system, and beam splitter, are all disposed within a common housing having a quickly-attachable/detachable connection for attaching same to said optical device. These optical elements are incorporated in their respective optical channels 51-54, respectively, to form a compact, lightweight, auxiliary optical unit which may be conveniently carried and held in the palm or pocket of the user for quick attachment to the normal telescopic gun sight when required, and for quick detachment therefrom when no longer required. www.wipo.int /ipdl/IPDL-CIMAGES/view/pct/getbykey5?KEY=03/107040.031224&ELEMENT_SET=DECL   (4033 words)

Magnetic Instruments It is the device to measure a magnetized property on surface of thin film magnetic materials, which is under processing to film in vacuum chamber, by using magnetic optical Kerr effect. By an application of Kerr effect, magnetic characteristic of thin film magnetic materials can be measured both by micro beam (OPTROSCOPE unit about 1mm phi) and by micro beam (micro Kerr optical unit about 1µm phi to 30µm phi). It is the device to measure wavelength dependence at magnetized conditions on surface of thin film magnetic materials, by using spectral light source, and to measure light transmittance. www.bluehilloptical.com /neoark_instruments.htm   (538 words)

Optoelectronic Semiconductor Devices - Principals and Characteristics. Optical semiconductor devices are widely used, in fields ranging from optical fiber communication systems to consumer electronics, and have become indispensable devices in the equipment and systems making up the infrastructure of our society. Most optical semiconductor devices are optoelectronic pn-junction devices, such as laser diodes, light-emitting diodes, and photodiodes. Most semiconductor optoelectronic devices are pn-junction diodes, and their performance depends on the properties of the pn-junction and of the semiconductor material. www.ece.concordia.ca /~i_statei/vlsi-opt   (538 words)

Surveillance Listening Device WA Act, a listening device or optical surveillance device cannot be used... surveillance device" means a data surveillance device, a listening device, an optical surveillance device or a tracking device; " tracking device... surveillance device" means a data surveillance device, a listening device, an optical surveillance device or a tracking device... www.99buckscctv.com /23/surveillance-listening-device.html   (625 words)

Technologies to improve the reliability of fiber-optic assemblies Goddard’s patented chemical-stripping device helps remove fiber coatings at clearly defined lengths without nicking the optical fiber, providing precise optical fibers for high-reliability applications. Chemical stripping of optical fibers: The stripping fixture holds a cable end for immersion in a chemical bath, allowing a precise length of fiber to be stripped, preparing it for assembly. When retrofitted on a connector-polishing machine, this device controls and allows adjustment of the connector’s apex offset—that is, the difference between the apex of the spherical polish and the center of the fiber core. nctn.oact.hq.nasa.gov /ft-tech-fiberoptic-techs.html   (905 words)

A magneto-optical disc control system and method. This magneto-optical disc device has well-known character -istic features, for instance, a magnetic film as a recording medium is used and an optical head having a laser light as a light source is used as a recording head. When a readout request of data out of the magneto-optical disc device is given from a task program via an OS, a magneto-optical disc driver outputs a readout command to the magneto-optical disc device. In a magneto-optical disc control system according to the present invention, when the upper control means reads data out of a blank check status block, the disc control means gives a notice for representing that a readout result is normal to the upper control means and writes the specific initial value into the designated buffer. gauss.bacon.su.se /EP/5/3/EP539966.html   (905 words)

IngentaConnect Transfer characteristics and propagation effects of a multi-reson... We describe the linear and nonlinear optical transfer characteristics of a multi-resonance device consisting of two optical ring resonators coupled one to the other and to an optical waveguide. Transfer characteristics and propagation effects of a multi-resonance ring resonator-based optical device The propagation effects displayed by the device are compared with those of a sequence of fundamental ring resonators coupled to a waveguide. www.ingentaconnect.com /content/tandf/tmop/2004/00000051/00000004/art00007   (905 words)

DC-300MHz Phase Modulator Polarization maintaining optical fiber is used at both the input and output ports, making the device ideal in applications dependent upon coherent interactions, or when integrated optical components are used in cascade. Low loss, simple and efficient operation make this phase modulator the chosen device for phase modulation, polarization modulation, optical delays and sensors. External modulation applied to the device creates a differantial phase modulation between these polarization states. www.thorlabs.com /ACB/showdetl.cfm?&DID=6&ObjectGroup_ID=747&Product_ID=26049   (905 words)

Class Definition for Class 385 - OPTICAL WAVEGUIDES The introduction of electromagnetic light radiation into an optical waveguiding structure from a source which is external to the structure, or the extraction of electromagnetic light radiation from an optical waveguiding structure to a detecting device at its exterior. The waveguiding structures which can be connected (as defined herein) include optical fibers, optical fiber bundles, nonfiber-like optical waveguides, and electro-optical transmitting or receiving devices (e.g., semiconductor laser diodes). An integrated optical circuit including a combination of an optical waveguide and a device of the Class 357 type is classified here provided the combination does not meet the requirement of a still larger system class. www.uspto.gov /go/classification/uspc385/defs385.htm   (3843 words)

Optical isolator and variable optical attenuator isolator using liquid crystals patent A combination optical element is disclosed wherein the functions of an optical isolator, a variable attenuator and an optical switch are combined into a component optical device. A variable optical attenuator ("VOA") is an optical device with which the amplitude or power level of an input optical signal may be attenuated by a variable amount to provide an output optical signal of a desired amplitude or power level. In one aspect, the invention is a composite optical component comprising: a liquid crystal cell and an isolator, wherein the state of polarization of light passing through the liquid crystal cell is maintained such that optical signals along subsequent optical paths propagate without interrupting the operation of said isolator. www.freshpatents.com /Optical-isolator-and-variable-optical-attenuator-isolator-using-liquid-crystals-dt20050210ptan20050030623.php   (1231 words)

Doug Fleenor Design - DMX512 Inline Isolator Data Sheet The In-line Optical Isolator should be the only device the console drives and it should be used within a few feet of the console. Isolation of the console from the dimmers is desirable because device failure in one of the dimmers can place damaging voltages on the control cable. The isolator consists of two integrated circuits (a 2500 volt optical coupler and a 60 mA line driver) mounted on two circuit boards (not even the circuit board connects the input to the output). www.dfd.com /optodata.html   (503 words)

Event stacker and display device - Patent 4017836 The signal from the optical isolator is boosted in a Darlington amplifier which is in turn used to run a LED display device indicating the presence of a binary event signal. The device of claim 1 wherein said optical isolator means comprises a light emitting diode and a light sensitive transistor. Actual implementation of the stacker includes a light emitting diode as the display device 24, which is located on the front panel of the stacker to enable the operator to easily verify event status during operation. www.freepatentsonline.com /4017836.html   (1394 words)

Optical density scanning head - Patent 4239393 In the prior art, such optical densitometers have been static densitometers and have usually been composed of a light source, a rotatable color light filter means, and a photosensitive device. Optical densitometers are well known in the graphic arts and are generally used to determine the optical density of a color swatch or an area of a sheet of material which is characterized by one of the basic colors cyan, magenta, or yellow. The amount of absorption depends on the optical density of the swatch color which in turn is related to the thickness of the ink. www.freepatentsonline.com /4239393.html   (2113 words)

Fiber Optic Glossary: A A/B Switch: A device that accepts inputs (optical or electrical) from a primary path and a secondary path to provide automatic or manual switching in the event that the primary path signal is broken or otherwise disrupted. In optical A/B switches, optical signal power thresholds dictate whether the primary path is functioning and signals a switch to the secondary path until optical power is restored to the primary path. Axial Propagation Constant: For an optical fiber, the propagation constant evaluated along the axis of a fiber in the direction of transmission. www.fiber-optics.info /glossary-a.htm   (843 words)

Patent 5473719: Optical dispersion compensator Any fiber-based device that is used to correct chromatic dispersion in a single-mode fiber must itself be single mode, where the term "single mode" is used in its accepted sense to mean that for a given wavelength, the fiber or device is supportive of only one propagating mode. Accordingly, a dispersion compensator 14 is typically included at the output end of the fiber link 13 where the broadened pulses 16 are restored to their original shape 17. The attractiveness of using a dual-mode fiber for dispersion compensation stems from the ability to achieve large negative waveguide dispersion by operating close to the cutoff wavelength of the LP.sub.11 mode, thereby minimizing the amount of fiber required to compensate a given amount of positive dispersion. www.freepatentsonline.com /5473719.html   (843 words)

39629.000706&ELEMENT_SET=DECL Thus, the optical signals, having generic polarization, that pass through these devices are subjected to a split into two orthogonal polarization components that propagate one with the ordinary indices of refraction nu and the other with the extraordinary index of refraction ne. Optical waveguides for the PMD crystal can be produced with the same technique used for the add/drop device itself, and the crystal can be attached directly to the device without inducing significant addition loss. Optical waveguide branch 102, connected to the port 202, is formed in the substrate 101. www.wipo.int /cgi-pct/guest/getbykey5?KEY=00/39629.000706&ELEMENT_SET=DECL   (9559 words)

[20040901] SPONTANEAOUS EMISSION AND LASER OSCILLATION IN MICROCAVITIES Recent progress in optical microcavity experiments is summarized, and the applicability in massively optical parallel processing systems and demands for the device performance are explored. In spite of the increasing importance of microcavities, device physics or the observable phenomena in optical microcavities such as enhanced or inhibited spontaneous emission and its relation with the laser oscillation has not been systematically well-described - until now. The effect of dephasing of vacuum fields on spontaneous emission in a microcavity and the effects of atomic broadening on spontaneous emission in an optical microcavity are examined. money.ticmundi.com /0-8493-3786-0.html   (9559 words)

Innovation: a round-up of the latest patent applications (February 2003) - News & Analysis - fibers.org The design is such that an optical signal propagating within the active waveguide portion penetrates the I layer of the PIN structure; the interaction affects the intensity of the optical signal without any substantial changes to the guiding properties of the semiconductor waveguide. The epitaxial structure of a monolithically integrated device is grown in a single run and comprises a number of layers, such that the lower part of the structure acts as a singlemode passive waveguide, while the upper part of the structure contains a planar PIN diode. The secret is a pair of polymer optical modules, which couple light sent to, and received from, respective fiber-optic cables. fibers.org /articles/news/5/2/11/1   (1003 words)

Pointing device utilizing a photodetector array (US5907152) An optical detection system particularly suited to us as a pointing device uses a photodetector array capable of generating a quasi-sinusoidal signal in response to illumination with an image of appropriate size. Cursor pointing device utilizing a photodetector array with target ball having randomly distributed speckles Electro-optical mouse with means to separately detect the changes in contrast ratio in X and Y directions www.delphion.com /details?pn=US05907152__   (390 words)

U.S. Pregrant 20040169786 - Liquid crystal display device and manufacturing method of liquid crystal display device DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. Liquid crystal display device and manufacturing method of liquid crystal display device cxp.paterra.com /uspregrant20040169786.html   (158 words)

Defects boost optical communications (October 2000) - News - PhysicsWeb Japanese scientists have created a device that could revolutionise optical communications by paving the way for all-optical circuits. They found that the defect behaved as an optical resonator with a resonant frequency that depends on its size. The team believes that this flexibility - combined with the geometry, efficiency and very small size of the new device - could have an enormous impact in global communications networks. physicsweb.org /article/news/4/10/1   (432 words)

U.S. Pregrant 20040032661 - Optical dispersion compensating device and optical dispersion compensating method using the device Optical dispersion compensating device and optical dispersion compensating method using the device In the present invention, the problems were solved using an optical dispersion compensating element comprising a multi-layer film element. In the past, the occurrence of wavelength dispersion in signals transmitted through optical fibers caused considerable problems in terms of communications at a communications bit rate of 10 Gbps or more, and particularly optical communications at 20 Gbps or more. cxp.paterra.com /uspregrant20040032661.html   (432 words)

Magneto-Optical Disk Configuration Guidelines Table 5-2, “Magneto-Optical Disk Configuration Requirements” lists the device drivers required to configure a magneto-optical disk to single-ended SCSI interface for each supported architecture. The following optical disks [listed with their respective product ID strings returned by SCSI Inquiry] can be configured to a Series 700 single-ended SCSI interface, Series 800 CIO or HP-PB single-ended SCSI interface: C1701A [S6300.650A], C1701C [C1716C], C2550B [C1716T]. If you are configuring an magneto-optical disk library, refer to the next section, "Magneto-Optical Disk Library Configuration Guidelines". docs.hp.com /en/B2355-90675/ch05s02.html   (339 words)

we make money not art: Circular Optical Object Locator COOL :: the Circular Optical Object Locator, by David Merrill and Tim Hankins, is a collaborative music-making device for people who don't have much musical skills. COOL :: the Circular Optical Object Locator, by David Merrill and Tim Hankins, is a collaborative music-making device for people who don't have much musical skills. WMMNA tells us of the Circular Optical Object Locator, a light-based music box of sorts created by David Merrill and Tim Hankins. www.we-make-money-not-art.com /archives/005026.php   (339 words)

Method for analyzing multilayer nonlinear optical waveguide Wu, “Nonlinear all-optical switching device by using the spatial soliton collision,” Fiber and Integrated Optics. Wu, M. Chen, and C. Chu, “All-optical logic device using bent nonlinear tapered Y-junction waveguide structure,” Fiber and Integrated Optics. Wu and M. Chen, “The fundamental theory of the symmetric three layer nonlinear optical waveguide structures and the numerical simulation,” J. Nat. www.opticsexpress.org /abstract.cfm?URI=OPEX-13-20-7982   (829 words)

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