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| Number | Title | Issue Date |
| 7411176 | Method and apparatus for examining corrosion of tendon embedded in concrete The present invention measures the strain caused by the shrink and expansion from the corrosion and examines the corrosion of a tendon for a long term with high sensitivity to improve the accuracy of the examination. ... | 08/12/2008 |
| 7393145 | Fault location in optical networks One apparatus embodiment includes an optical emitter and a photodetector. At least a portion of the optical emitter extends a radial distance from a center point. The photodetector provided around at least a portion of the optical emitter and positioned outside the ... | 07/01/2008 |
| 7373056 | High-voltage component with optical fiber and method for producing it A high-voltage component, having a first end and a second end, whereby the first end is on a high-voltage potential with respect to the second end. An insulating part, is arranged between the first end and the second end, and an optical fiber is integrated in the hi... | 05/13/2008 |
| 7326916 | Optical submarine transmission system A main line cable and a backup line cable are laid in a land portion in different routes. A land terminal station includes a break detecting unit that detects a break of the main line cable, and a path switching unit that switches a transmission path to the backup l... | 02/05/2008 |
| 7301612 | Optical network and method including self-test capability An optical Wavelength Division Multiplexing (WDM) network system having a built-in self-testing capability of all optical paths in the network. A test signal generator is used to apply a low frequency test signal to a plurality of transmitters of the system. The tes... | 11/27/2007 |
| 7278657 | Method and apparatus for controlling an actuatable occupant protection device using an ultrasonic sensor A system (10) for helping to protect a vehicle occupant includes a crash sensor (32) operative to sense a vehicle crash event and provide a crash signal having a characteristic indicative of the sensed crash event. An acoustic safing sensor (34)... | 10/09/2007 |
| 7241039 | LED lighting system with helical fiber filament A lighting system includes a helical light-transmitting fiber and an LED. The helical light-transmitting fiber is doped with a first wavelength converting material and defines a helical axis. The LED has a light-emitting portion for emitting light of a first color. ... | 07/10/2007 |
| 7211783 | Tamper-proof container A sheet includes an optical fiber extending across at least a portion of its surface to detect nuclear radiation. The sheet can line at least a portion of a shipping container or box. Radiation within or outside the container or box reduces optical transmissibility ... | 05/01/2007 |
| 7194913 | Apparatuses and methods for monitoring stress in steel catenary risers The invention describes apparatuses and methods of monitoring fatigue, structural response, and operational limits in structural components. More particularly, the present invention relates to fatigue, response, and operational monitoring systems on steel catenary r... | 03/27/2007 |
| 7189959 | Fiber optic impact detection system Closely spaced conventional optical fibers are arranged in a grid placed between a first surface and a second surface. A penetrating impact onto the first surface results in a hole of a size proportional to the diameter and velocity of the impacting object. The size... | 03/13/2007 |
| 7187819 | Optical power distribution management and apparatus A method, apparatus and computer program are disclosed for managing the distribution of optical power to a plurality of optical data devices. The devices can be data storage drives, data replicators, fast optical search devices, or other components that use optical ... | 03/06/2007 |
| 7167237 | Test system for optical line which carries out fault search for optical line from user optical terminal side A fault searching system searches for a fault in an optical line connected with an optical fiber carrying out data transmission between a transmission apparatus and a user optical terminal. A connecting unit detaches a terminal portion of the optical line at the use... | 01/23/2007 |
| 7157692 | Fiber optic tester A fiber optic tester (10) broadly comprises a testing unit (16) to take measurements across two test points (27), a processing unit (18) to locate faults by analyzing the measurements, a switching unit (20) that can connect termina... | 01/02/2007 |
| 7146073 | Fiber delivery system with enhanced passive fiber protection and active monitoring In an optical fiber system for delivering laser, a laser beam is focused onto an optical fiber at an injection port of the system. The end portions of the fiber have cladding treatments to attenuate stray light and cladding mode light, so as to enhance the protectio... | 12/05/2006 |
| 7142736 | Distributed fiber sensor with interference detection and polarization state management Polarization effects are managed to provide differential timing information for localizing disturbances affecting two or more counter-propagating light signals on one or more optical waveguides passing through a detection zone. Activity can be localized to a point f... | 11/28/2006 |
| 7135973 | Tamper monitoring article, system and method A tamper monitoring article and system, and an associated method of making, installing and using the article and system. The article has an elongate body portion. The body portion has a first end portion that adheres to a second end portion, if present, or to a subs... | 11/14/2006 |
| 7110098 | Bidirectional optical loss measurement The present invention relates to an apparatus and to a method of measurement of optical loss of a DUT having a first end and a second end, comprising the steps of: coupling an optical signal into the first end of the DUT, measuring the optical power of the optical s... | 09/19/2006 |
| 7110364 | Optical link adjacency discovery protocol and an optical network therefor An optical link adjacency discovery protocol is provided. The protocol includes a simple format that includes an identifier field of a local node and facility and an identifier field of an echo node and facility. An announce message, including a source field having ... | 09/19/2006 |
| 7098444 | Tamper proof container A liner sheet lines at least a portion of an interior surface of a shipping container or box and defines an optical path extending across at least a portion of the sheet, such that a breach of the interior surface also alters an optical characteristic of the optical... | 08/29/2006 |
| 7068424 | Multiple pulse generation An electromagnetic radiation (EMR) multiple pulse generator, comprising, an EMR source for producing discrete pulses of radiation, an EMR splitter for receiving the pulses of radiation produced by the EMR source, said splitter providing a plurality of ... | 06/27/2006 |
| 7060966 | Fiber optic tester A fiber optic tester (10) broadly comprises a testing unit (16) to take measurements across two test points (27), a processing unit (18) to locate faults by analyzing the measurements, a switching unit (20) that can connect termina... | 06/13/2006 |
| 7041960 | Bond separation inspection method using compressive thermal strain in optical sensor part A bond separation inspection method using an optical fiber sensor. The method includes a step of embedding a sensor part of an optical fiber sensor in an adhesive joining a plurality of members together. The sensor part is embedded in the adhesive in such a way that... | 05/09/2006 |
| 7038192 | Optical sensor method, system and apparatus An optical sensor system and method for determining the position, displacement and/or angle of a member (for example, a seal plate or valve gate) within a system (for example, a valve assembly in an aircraft turbine engine system or environmental control system). Th... | 05/02/2006 |
| 7026603 | Fault locator for testing a complex optical circuit A fiber optic tester (10) broadly comprises a testing unit (16) to take measurements across two test points (27), a processing unit (18) to locate faults by analyzing the measurements, a switching unit (20) that can connect termina... | 04/11/2006 |
| 6995353 | Tamper-proof container A sheet includes an optical fiber extending across at least a portion of its surface to detect a breach or nuclear radiation. The sheet can line at least a portion of a container or a fence. A breach of the sheet or radiation within or near the sheet reduces optical... | 02/07/2006 |
| 6980287 | System for testing an optical network using optical time-domain reflectometry (OTDR) The present invention concerns a system 10 using optical time-domain reflectometry (OTDR) to test a plurality of optic fiber lines 13 in a telecommunications network, more particularly suited to tree topology networks of PON type (Passive Optical Netwo... | 12/27/2005 |
| 6930813 | Spatial filter source beam conditioning in ellipsometer and the like systems Disclosed is the application of spatial filters and beam energy homogenizing systems in ellipsometer and the like systems prior to a sample system. The purpose is to eliminate a radially outer annulus of a generally arbitrary intensity profile, so that electromagnet... | 08/16/2005 |
| 6924474 | Light leakage detecting device of an optical transmission system using fiber optic cable A technique is provided in which the inside and outside of an exposure device is prevented from being adversely affected by leakage of light by setting an inspection output most suitable for high-power LD. A light-leakage detection level is set correspondingly to ou... | 08/02/2005 |
| 6917750 | System and method for characterizing optical devices The invention relates to systems and methods for characterizing optical devices, and particularly to one that characterizes optical devices such as fiber Bragg gratings. In one embodiment, a system and method include the use of two light sources and four detectors t... | 07/12/2005 |
| 6909977 | Method for diagnosing degradation in aircraft wiring Wiring in new and older aircraft use bundled insulated conductors that are subject to deterioration overtime that can result in on-board fires, loss of in-flight control and eventual crashes of the aircraft. The present invention provides a diagnostic method which p... | 06/21/2005 |
| 6778717 | Apparatus and method for monitoring a structure using a counter-propagating signal method for locating events A method and apparatus for monitoring a structure and for locating the position of an event including a light source, a waveguide, and a detector means. The waveguide receives light from the light source so that the light is caused to propagate in counter-propagatin... | 08/17/2004 |
| 6778716 | Method and apparatus for MEMS optical sensing using micromirrors An optical sensing device uses a set of source mirrors directing light from a set of light sources to a movable collector mirror. Each of the light sources has a unique wavelength. The collector mirror is coupled to a MEMS actuator that moves the collector mirror in... | 08/17/2004 |
| 6756580 | Fiber grating bond joint health monitoring system Fiber grating environmental measurement systems are comprised of sensors that are configured to respond to changes in moisture or chemical content of the surrounding medium through the action of coatings and plates inducing strain that is measured. These sensors can... | 06/29/2004 |
| 6734411 | Method and apparatus for controlling power levels of optical signals in optical fiber interconnects In the method and apparatus for providing an optical fiber interconnect, a transmitter transmits an optical signal through an optical fiber. The transmitter does not transmit to a controller, information about the power of the transmitted optical signal near the inp... | 05/11/2004 |
| 6492636 | Large scale high speed multiplexed optical fiber sensor network A digital spatial and wavelength domain system for multiplexing fiber Bragg grating sensors comprises: a plurality of optical fibers, each including a plurality of fiber Bragg gratings therein, each fiber Bragg grating having a selective center wavelength... | 12/10/2002 |
| 6472655 | Remote amplifier for an optical transmission system and method of evaluating a faulty point A remote amplifier of the present invention includes an optical splitter and an optical combiner respectively connected to an input and an output thereof. One end of the split output of the splitter is used as an input port while one end of the combiner i... | 10/29/2002 |
| 6456685 | Method and apparatus for cutting waveguides to precise differential lengths using time-domain-reflectometry An apparatus and method for cleaving optical waveguides to precise differential length are described. A first end of a waveguide is coupled to an input port of a reflectometer. A reference mirror is then positioned in a path of radiation propagating throu... | 09/24/2002 |
| 6452157 | Apparatus integrated in a fiber processing machine for recognizing and processing impurities An apparatus for detecting foreign bodies in fiber material includes at least two light sources. At least one of the light sources has at least three light emitting elements. Each light emitting element radiates a light of different color. An arrangement ... | 09/17/2002 |
| 6304713 | Optical fiber seal verifying system An optical fiber seal verifying system includes an optical pattern generation unit for reading the optical pattern of an optical fiber seal in sealing and verification and generating first and second optical pattern data corresponding to the sealing and v... | 10/16/2001 |
| 6194707 | Automatic laser shutdown method and apparatus in optical transmission system An optical transmission system controls an ALS (Automatic Laser Shutdown) function using a message. The optical transmission system includes first and second optical repeaters. The first optical repeater monitors a plurality of optical lines incoming from... | 02/27/2001 |
