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7630591 Optical fiber substrate useful as a sensor or illumination device component  
This disclosure generally pertains to a method for manufacturing a distributed optical fiber scrim comprising a functional optical fiber, the functional optical fiber scrim thus manufactured, and...
7595476 Electrical circuit, apparatus and method for the demodulation of an intensity-modulated signal  
A modulated optical radiation field (I) whose modulation amplitude and temporal phase depend on the local position can be detected with a plurality of pixels 1 . Each pixel 1 consists of a...
7589312 Physical quantity measuring system with fiber Bragg grating sensor and arrayed waveguide grating  
A physical quantity measuring system includes an optical fiber in which plural fiber Bragg gratings having different reflection wavelength changing bands are formed along the optical fiber in a...
7541573 Optical sensors for sensing the refractive index of fluid samples  
An optical sensor comprises a sensing element comprising a waveguide grating with a response that varies with an effective modal index experienced by light propagating in the grating and a sample...
7536911 Diagnostic systems of optical fiber coil sensors for structural health monitoring  
Devices for monitoring structural health conditions of host structures. A device includes at least one optical fiber sensor and an electronic module. The optical fiber sensor includes a rolled...
7526147 Sensor array for perimeter defense  
An intensity modulated broadband optical signal source is arranged to produce optical signals in a plurality of wavelength bands. A demultiplexer/multiplexer pair receives optical signals from the...
7526149 Dual wavelength strain-temperature Brillouin sensing system and method  
An optical fiber strain-temperature sensing system includes first and second optical sources respectively generating first and second light signals having different wavelengths. Optical circulators...
7503215 Highly sensitive accelerometer  
Accelerometers for determining acceleration and methods of fabricating an accelerometer are disclosed. In one embodiment, the accelerometer includes a frame, a mass movably suspended on the frame,...
7502531 ***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
Multi-channel array processor  
A method and apparatus for monitoring one or more environmental parameters using interferometric sensor(s), a cross-correlator, a two-dimensional photosensitive array and optical focusing means are...
7488929 Perimeter detection using fiber optic sensors  
A fiber optic perimeter detection system includes a receiver to receive output light signals from sensors positioned at different regions, each sensor including a sensing fiber. Each sensor...
7439485 Multimode optical transmission apparatus and multimode optical transmission system  
A multimode optical transmission system reduces a deterioration of a noise characteristic and a distortion characteristic caused by an interference between modes. In an optical transmitter, a...
7437028 Multi-layered sensor  
A multi-layer sensor ( 10 ) and a use for the sensor ( 10 ) are described. This sensor is multi-layered in construction. 5 An optical wave guide ( 18 ) is passed through the sensor ( 10 ) such...
7426322 Plasmon photocatalysis  
Plasmons on a waveguide may deliver energy to photocatalyze a reaction. The waveguide or other energy carrier may be configured to carry electromagnetic energy and generate plasmon energy at one or...
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...
7385177 Light guide rotation rate detector with coupled optical resonators  
A method and device are presented for use in determining a rate of rotation of an object. The device comprises a light guide comprising an arrangement of a plurality of coupled optical resonators...
7379631 Multi-core distributed temperature sensing fiber  
A multi-core distributed temperature sensing optical fiber is described, wherein the arrangement and construction of at least two cores provides a spectral attenuation corrected (e.g., corrected...
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...
7349591 Pressure compensated optical accelerometer, optical inclinometer and seismic sensor system  
An optical accelerometer includes means for changing the length of at least one optical fiber in response to acceleration functionally coupled to the at least one optical fiber. The fiber and the...
7326917 Wear monitor for turbo-machine  
A wear determination device for determining vibration in a turbine engine component to reduce wear in a turbine engine. The wear determination device may be capable of measuring vibrations in a...
7315667 Propagating light to be sensed  
Light to be sensed is spreaded across an entry surface of a transmission structure with a laterally varying energy transmission function. For example, the light could be output from a...
7312435 Determination of a physical state of an optical device  
The present invention relates to a determination of a physical state of an optical device by measuring a response signal. At least two subsequent measurements are executed. Therefore, a first...
7281428 Diagnostic system for monitoring structural health conditions  
Interrogation systems for monitoring structural health conditions. An interrogation system includes at least one wave generator for generating a wave signal and optical fiber sensors applied to a...
7228017 Fiber optic sensing device and method of making and operating the same  
A chemical sensing device comprises a fiber core and a fiber cladding. The fiber core comprises an index-modulated grating region having an apodized profile configured for increasing shedding of...
7197931 Sensors for monitoring structural health conditions  
Sensors and systems for monitoring structural health conditions. The present invention provides a device for monitoring structural health conditions including a dielectric substrate, a...
7157693 Optical wavelength interrogator  
An optical wavelength readout system for application in optical sensing systems is disclosed. The system includes a Master unit including a wavelength swept optical source for launching light into...
7154082 Frequency division and/or wavelength division multiplexed recursive fiber optic telemetry scheme for an optical sensor array  
An optical fiber sensor array is disclosed which includes a first sensor fiber and a first reference fiber coupled at one end thereof to one side of a first optical coupling. A first wavelength...
7155077 Optical fiber based surface sensing system that enables spectral multiplexing  
A surface sensing system including at least two sensors located on the end of the same optical fiber. The sensors are configured such that they exhibit resonant frequencies or Q-factors that are...
7151249 Method for determining the cut-off wavelength of an optical fibre as well as a device suitable for that purpose  
The present invention relates to a method and a device for determining the cut-off wavelength of an optical fiber. A first aspect of the present invention is to provide a method for determining the...
7137299 Fiber optic accelerometer  
A proof mass is suspended in a cavity in a housing. The proof mass moves along a sensing axis in response to linear acceleration. Elastic support members are connected between the proof mass and...
7138621 Optical fiber sensors based on pressure-induced temporal periodic variations in refractive index  
A optical fiber sensor for measuring temperature and/or pressure employs temporally created long period gratings. The gratings may be produced by a periodic change in the refractive index of the...
7122783 Seismic activity monitor based on optical fiber Bragg gratings  
Fiber Bragg gratings (FBG) seismic activity sensors coupled in sensor arrays provide increased sensitivity to seismic activities, lower strain values and an absence of EMI allowing detection of...
7123795 Methods for the alignment and calibration of the spectral responses of optical filters  
A method for aligning the spectral responses of two comb-like optical filters is provided. This method does not necessitate the use of spectrally-resolved equipment, as it uses the optical power...
7119324 Highly stable broadband light source and suitable stabilization method therefor  
A highly stable broadband light source includes a semiconductor light source having a specific emission spectrum, an optical filter having a specific bandpass filtering function and a predetermined...
7109471 Optical wavelength determination using multiple measurable features  
A method and apparatus for quickly and accurately determining optical wavelengths using multiple features of an optical spectrum produced by an optical element that is configured to produce an...
7103276 Optical band scanning monitor system and method  
A scanning optical monitoring system and method are appropriate for high speed scanning of a WDM signal band. The system and method are able to identify dropped channels or, more generally,...
7088491 Pulse generating apparatus and method  
An apparatus and method generating an optical pulse of picosecond class (having a high duty ratio), which accurately and stably operates at an arbitrary repetition frequency, has a high OSNR, and...
7076122 Patch-type extrinsic Fabry-Perot interferometric fiber optic sensor and real-time structural vibration monitoring method using the same  
A patch-type extrinsic Fabry-Perot interferometric fiber optic sensor and a real-time structural vibration monitoring method using the same are disclosed. The patch-type extrinsic Fabry-Perot...
7064315 Method and device for compensating for interfering variables in an optical sensor  
The method and the device are used for compensating for interfering variables in an optical sensor ( 50 ), which is at least sensitive with respect to a measured variable (M), a wavelength (λ) of...
7060967 Optical wavelength interrogator  
An optical wavelength readout system for application in optical sensing systems is disclosed. The system includes a Master unit including a wavelength swept optical source for launching light into...
7054521 Architecture for large optical fiber array using standard 1×2 couplers  
Sensor arrays utilizing standard 1×2 couplers reduce the differences in the returned optical power levels by appropriate selection of the coupling ratios. Preferred embodiments are described that...
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...
7030366 Micro piezo-optic composite transducers and fabrication methods  
A micro piezo-optic composite transducer comprises: dielectric material; electrodes situated over opposing surfaces of the dielectric material; an optical fiber embedded in the dielectric material,...
7031560 Resonant sensor with optical excitation and monitoring device using this sensor  
Resonant sensor with optical excitation and monitoring device using this sensor. This sensor comprises a doped silicon resonator ( 4 ) to absorb radiation (Re) with wavelength longer than 1100 nm...
7013729 Highly sensitive accelerometer  
A highly sensitive accelerometer for determining the acceleration of a structure includes a mass within a housing suspended by opposing support members. The support members are alternately wound...
7008103 Method and apparatus for temperature sensing utilizing optical fiber  
A method and apparatus for sensing temperature using optical fiber is provided. In one embodiment, a method for sensing temperature using optical fiber includes launching a polarized optical signal...
7005630 Energy-modulating fiber grating sensor  
This invention relates to a new technique of interrogating fiber grating sensors employed for measuring physical quantities such as temperature and force. The technique involves the edge filtering...
6972400 Multi-mode vibration sensor laser  
A multimode remote vibration sensor. The inventive sensor ( 8 ) includes a mode locked laser transmitter ( 10 ); a receiver ( 30 ) adapted to detect signals transmitted by the laser ( 10 ) and...
6969842 Dispersion discrimination for wideband optical signals  
A system for detecting dispersion in an incoming optical signal centered about a channel center frequency. The system includes a splitter unit for separating the incoming signal into first and...
6955085 Optical accelerometer or displacement device using a flexure system  
Disclosed herein is an accelerometer and/or displacement device that uses a mass coupled to a rhomboidal flexure to provide compression to an optical sensing element preferably having a fiber Bragg...
6946645 Measuring system with sweeping comb filter and multiplexer  
High-resolution measurement of a parameter is provided at multiple different locations simultaneously along an optic fiber. Light within a predefined range of wavelengths is transmitted into an...
Matches 1 - 50 out of 203 1 2 3 4 5 >