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8184980 |
Method and system for fiber-optic monitoring of spatially distributed components
A system for monitoring ancillary elements of an electric power distribution network, includes an optical fiber path associated with the ancillary elements to be monitored, respective optical...
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8174685 |
Measurement of nonlinear effects of an optical path
A network device may include a receiver to receive optical pulses from an optical path, wherein the optical pulses include a plurality of intensities and represent data. The network device may also...
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8175869 |
Method, apparatus, and medium for classifying speech signal and method, apparatus, and medium for encoding speech signal using the same
A method, apparatus, and medium for classifying a speech signal and a method, apparatus, and medium for encoding the speech signal using the same are provided. The method for classifying a speech...
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8164744 |
Inspection tip for a fiber optic inspection probe
An inspection probe is disclosed for use with a fiber optic adapter. The inspection probe can inspect a terminated end of an optical fiber within the fiber optic adapter. The fiber optic adapter...
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8165477 |
Light receiving apparatus using DQPSK demodulation method, and DQPSK demodulation method
The present invention provides a light receiving apparatus using the DQPSK demodulation method. The light receiving apparatus comprises: one Mach-Zehnder interferometer for branching a received...
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8155487 |
Sensor element
In an embodiment, a sensor element is provided. The sensor element may include a light input configured to receive input light, a sample chamber configured to accommodate a sample, and at least one...
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8154715 |
Method for monitoring and measuring optical properties of device in polarization maintaining fibers by using reference fiber bragg grating and fiber components manufactured thereby
A method for measuring and monitoring the state of polarization (SOP) of a polarization maintaining (PM) fiber using a narrowband fiber Bragg grating (FBG) written on the same is provided. The PM...
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8144314 |
Spectral measurement apparatus and measurement method utilizing Brillouin scattering
The present invention relates to a spectral measurement apparatus and measurement method utilizing Brillouin scattering, which judge the state of the temperature or strain of an optical fiber more...
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8144315 |
Method and apparatus for characterizing a multilayered structure
An apparatus and method for characterizing the complex coupling coefficient of a multilayered periodic structure either during or after inscription is described. This apparatus is capable of...
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8139209 |
System and method for measuring a laser-induced damage threshold in an optical fiber
A system for measuring a laser-induced damage threshold in an optical fiber may include a lens to direct a first laser beam through a core of the optical fiber. The system may also include an...
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8134696 |
Measuring Brillouin backscatter from an optical fibre using a tracking signal
A method for measuring Brillouin backscattering from an optical fiber, includes frequency mixing a first signal with a frequency representative of the Brillouin frequency shift in backscattered...
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8130370 |
Selection of a signal input from an optical fiber member
Methods and systems for analyzing optical parameters of a selected optical fiber member are disclosed. A signal input from an optical fiber member may be selected by instructing a corresponding...
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8130381 |
Optical fiber probe
An optical fiber probe for an optical measuring device having a mechanical receptacle into which an optical fiber is inserted, having a fiber end piece which projects over the mechanical receptacle...
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8131121 |
Optical fiber pipeline monitoring system and method
In accordance with one aspect of the present invention, a fiber surveillance system for monitoring a pipeline is provided. The surveillance system includes an optical fiber acoustically coupled to...
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8120762 |
Light guide and optical sensing module input device and method for making same
A light guide has a first surface and a second surface with diffractive structures. A slanted facet is provided at one corner of the light guide. The diffractive structures have concentric fringes...
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8115913 |
Light pulse generator and optical time domain reflectometer using the same
There is provided a light pulse generator. The light pulse generator includes: a laser diode; a voltage source that provides a bias voltage to the laser diode; a switching element that causes the...
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8111957 |
+cylindrical polarization beams
Generation of a cylindrically polarized light beam, and in particular, a hybrid-azimuthal-radial polarization beams, called HARP modes, generated from an input linearly polarized Gaussian beam...
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8111385 |
Quantum dot-mediated optical fiber information retrieval systems and methods of use
The present disclosure relates to a non-invasive and real-time diagnostic analysis concept for an operational single mode optical fiber communication system and methods of using said system. The...
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8111386 |
Measuring modal content of multi-moded fibers
The output modal content of optical fibers that contain more than one spatial mode may be analyzed and quantified by measuring interference between co-propagating modes in the optical fiber. By...
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8102519 |
System and method for measuring dispersion
A method for measuring dispersion in an optical fiber is provided and includes the following steps. A periodic wavelength variation pulse light signal is generated by a periodic frequency-swept...
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8098371 |
Apparatus for measuring residual stress of optical fiber
The present invention relates to an apparatus for measuring a residual stress of an optical fiber. More particularly, the present invention relates to an apparatus for measuring residual stress of...
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8089619 |
Process for manufacturing a microstructured optical fibre and method and system for on-line control of a microstructured optical fibre
A manufacturing process of a microstructured optical fiber including a void-containing region, includes the steps of: drawing a microstructured optical fiber along a longitudinal direction from a...
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8081306 |
Method and system for localizing an attenuation change location in an optical waveguide
The invention provides a method and a system for localizing an attenuation change location in an optical waveguide, wherein the attenuation change location can be determined depending on a time...
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8077299 |
Method for measuring polarization characteristics of optical fiber, drawing method, method for identifying abnormal point, and method for configuring optical fiber transmission line
The present invention relates to a measuring method, etc., comprising a structure for accurately measuring optical characteristics such as PMD of an optical fiber. The measuring method is a...
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8077314 |
Measuring a characteristic of a multimode optical fiber
To measure a characteristic of a multimode optical fiber, a light pulse source produces a light pulse for transmission into the multimode optical fiber. A spatial filter passes a portion of...
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8077298 |
Apparatus for monitoring optical obstructions in an optical split network and method thereof
An apparatus and method for monitoring optical fiber obstructions in an optical split network is described. The monitoring apparatus comprises a broadband-monitoring light source module, an optical...
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8073294 |
Remote optical fiber surveillance system and method
In accordance with one aspect of the disclosed technology, wireless communications are used in a fiber surveillance system to enable monitoring of remote locations for vibrations, acoustic signals,...
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8058869 |
Fiber laser magnetic field sensor
The device includes two supports and a primary conductive strip. The primary conductive strip includes a neutral surface, a first side, and a second side. The primary conductive strip is connected...
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8054455 |
Optical amplifier provided with control function of pumping light, and optical transmission system using the same
In an optical transmission system according to one aspect of the present invention, for transmitting a WDM light from a transmission station to a reception station, utilizing a Raman amplifier, the...
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8045143 |
Optical phase domain reflectometer
An apparatus to measure optical characteristics of an optical medium may include an optical source to generate an optical square wave for transmission into the optical medium and an optical...
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8045174 |
Assessing a network
A network is assessed, in particular, a network having a main line and a plurality of branch lines. The method includes the steps of: (i) introducing test signals into the main line, the main line...
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8040496 |
System and method for an illumination-quality test
An endoscopic illumination tester is provided for testing illumination quality of a light source. The endoscopic illumination tester includes an optical bridge that is removably interlockable with...
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8040523 |
Measurement method of chromatic dispersion of optical beam waveguide using interference fringe measurement system
The present invention relates to a measurement method of the chromatic dispersion of an optical waveguide using an optical interferometer with a broadband multi-wavelength light source and an...
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8027584 |
Sensing a disturbance
The present invention relates to a system for sensing of a disturbance on an optical link. Data traffic from an optical source with a short coherence length is transmitted along the link to a...
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8023774 |
Method, apparatus and system for minimally intrusive fiber identification
A method, apparatus and system for minimally intrusive fiber identification includes imparting a time-varying modulation onto an optical signal propagating in an optical fiber and subsequently...
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8023833 |
Optical receivers with controllable transfer function bandwidth and gain imbalance
Techniques, devices and systems based on optical receivers with controllable transfer function bandwidth and gain imbalance.
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8013986 |
Measuring brillouin backscatter from an optical fibre using channelisation
Methods and apparatus for measuring Brillouin backscattering from an optical fiber. A pulse of light with a first frequency is launched into an optical fiber. Backscattered light is received from...
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8013985 |
Methods of measuring the refractive index profile of a transparent cylindrical object
Methods of measuring the refractive index profile of a transparent cylindrical object, such as a fiber preform, are disclosed. The methods include transmitting light rays through the cylindrical...
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8014670 |
Method and apparatus for testing and monitoring data communications in the presence of a coupler in an optical communications network
Some optical communications networks include one ingress fiber, an n-way signal coupler, and n egress fibers, where each fiber may carry signals in one or both directions. A method and apparatus...
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8013987 |
Method and apparatus for fiber optic signature recognition
A method and apparatus is disclosed for use in fiber optic signature recognition to analyze buried optical fiber to identify a non-threat area along a fiber route and to discontinue monitoring for...
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8009279 |
Characterization of non-linear optical materials using bragg coupling
Methods of characterizing non-linear optical materials and fabricating wavelength conversion devices are provided. The method of characterizing non-linear optical materials comprising a...
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8005323 |
Method and apparatus for generation and transmission of high energy optical pulses for long range measurements
A method and apparatus for generating and transmitting high energy optical pulses are described. Distributed temperature sensors usually use Raman scattering in optical fibers as the means to...
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7999928 |
Method and system for combined Raman and LIBS detection
In one embodiment, the disclosure relates to a method for interrogating a sample by: illuminating a first region of the sample with a first illumination pattern to obtain a plurality of first...
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7999930 |
Detection system and optical fiber for use in such system
A detection system comprising: (i) an optical fiber, the optical fiber having (a) a length L≧1 km; (b) beat length between 10 m and 100 m; and (c) beat length uniformity over any distance of at l...
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7997792 |
Optical fiber temperature sensor
The present invention relates to an optical fiber temperature sensor capable of reducing an error in a temperature measurement. The sensor comprises an optical fiber, an optical frequency...
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7995874 |
Optical fiber distribution type sensor and optical fiber distribution type detecting method
The present invention relates to an optical fiber distribution type detecting method and the like equipped with a structure for enabling efficient measurement of a temperature distribution or...
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7995198 |
Optical fiber feature distribution sensor
The present invention relates to an optical fiber characteristic distribution sensor comprising a structure to effectively reduce the measurement errors of position in the temperature distribution...
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7995197 |
Distributed backscattering
The present invention relates to a method for detecting or inferring a physical disturbances on a communications link, in particular by using distributed backscattering. The method includes the...
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7986401 |
Birefringent fibers orientation measurement
Methods and apparatus to determine the orientation of randomly arranged birefringent fibers are disclosed. One method comprises emitting light, creating Ni polarization states of the emitted light,...
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7983570 |
Direct detection differential polarization-phase-shift keying for high spectral efficiency optical communication
Efficient apparatus, methods, systems and devices to generate, transmit and detect optical differential polarization-phase-shift keying signals are disclosed for high spectral efficiency optical...
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