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7388657 |
System and method for monitoring an optical communication system
A monitoring system and method may be used to monitor an optical communication system. A monitoring system and method may be used to derive loop gain data sets from optical time domain...
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7385706 |
Method and apparatus for determining the nonlinear properties of devices and fibers
A method and apparatus are provided for measuring samples of the electric field of light propagated through a device under test and determining a nonlinear property of the device, such as...
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7385683 |
Method of characterizing fiber Bragg gratings using iterative processing
A method determines a complex reflection impulse response of a fiber Bragg grating. The method includes providing a measured amplitude of a complex reflection spectrum of the fiber Bragg grating....
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7379646 |
Optical fiber product, method of fabricating optical cable, and characteristic evaluation method
The present invention relates to an optical fiber product suitable for fabricating an optical cable that requires a complicated length adjustment. The optical fiber product includes an effective...
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7379169 |
System and method for integrated measurement using optical sensors
An integrated measurement system for measuring a plurality of parameters is disclosed. The integrated system includes a fiber Bragg grating (FBG) sensor configured for modulating a wavelength of an...
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7379168 |
Polarization diversity detection without a polarizing beam splitter
A fiber optic measurement device including an optical frequency domain reflectometer (OFDR) performs polarization diversity detection without using a polarizing beam splitter.
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7376359 |
Digital regulated light receive module and regulation method
The invention discloses a digital adjusting method for an optical receiver module, and the method implements real-time monitor of parameters, on-line adjustment and non-linear compensation. The...
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7373027 |
Method for characterizing an optical fiber link
A method for characterizing an optical link by its beat length, coupling length and polarization mode dispersion is disclosed. A pulsed signal is sent along said optical fiber link and the...
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7372554 |
Selection of a signal input from an optical fiber member
The present invention provides methods and apparatuses for analyzing optical parameters of a selected optical fiber member. A signal input from an optical fiber member is selected by instructing a...
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7372553 |
Apparatus and method for detecting defect in optical fiber, and plastic optical fiber manufacturing apparatus
While a plastic optical fiber (POF) strand is guided by guide pulleys toward a winding machine, an internal defect in the POF strand is detected by a defect detection apparatus. The defect...
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7369249 |
Apparatus for measuring differential mode delay of multimode optical fiber
Disclosed herein is an apparatus for measuring the differential mode delay of multimode optical fiber. The apparatus includes a tunable laser source, an interferometer, a data collecting device,...
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7369219 |
Active wavelength converter for use with an optical time-domain reflectometer (OTDR) and method for increasing OTDR supervision distance range
A converter device that changes the wavelength of optical signals originated by an OTDR to supervise optical networks, in a manner that eliminates the traffic signal interference in the supervision...
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7362427 |
Polarized lightwave reflectometry method (POTDR)
A polarized lightwave reflectometry method including the steps of sending at least two polarized light signals into the optical fiber to be tested, the signals presenting a determined angular...
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7359634 |
Light color recognition for optical connection verification
Optical connection verification schemes that do not cause electromagnetic interference. An all-optical connection verification scheme exploits optical coding based on a standard color scale such as...
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7356208 |
Fiber detector apparatus and related methods
A fiber detector apparatus includes a hub having one or more electrical contacts. The hub is configured to be placed against a connector, which is disposed on an electromagnetic energy source, such...
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7352971 |
Broadband control of polarization mode dispersion
A method and system is provided for compensating polarization mode dispersion (PMD) in an optical communications system includes a controller designed to control a broadband PMD compensator to...
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7352450 |
Determination of polarization dependent properties
The invention relates to determining a polarization dependent property of an optical device under test, wherein a response signal is received from the device under test in response to an optical...
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7350972 |
Distributed temperature sensor using optical reflectometry
A temperature sensing method in which pulses of optical radiation are launched by a laser diode ( 11 ) into an optical fibre ( 14 ) and optical radiation backscattered from the fibre is detected,...
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7349077 |
Method and apparatus for measuring the polarization mode dispersion of an optical fiber
The present invention relates to a new model for interpreting interferometric measurements, able to lead to a new method, system ( 10 ) and device ( 27 ) for measuring the PMD (Polarisation Mode...
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7345769 |
Load dependent analyzing optical components
The present invention relates to an apparatus and to a method of load dependent analyzing an optical component ( 114 ), comprising the steps of: splitting an initial signal ( 115 ) into the...
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7342653 |
Apparatus and method for synchronizing high-speed optical measurements made over a range of wavelengths
A light instrumentation system for measuring optical power or intensity of an input as wavelength of the input varies with respect to a time includes a reference providing a detectable optical...
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7341384 |
Fiber optic transceiver module having built-in test capability and associated method
A fiber optic transceiver module, having built-in test capability and a low physical profile that meets mil spec requirements, comprises a housing. The housing comprises an optical fiber having an...
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7340148 |
Methods and systems for controlling fiber polarization mode dispersion (PMD)
A method is provided for predicting an installed performance parameter of an optical fiber cable. The method includes obtaining a measurement indicative of a value of the performance parameter at a...
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7330245 |
Calculation of birefringence in a waveguide based on Rayleigh scatter
Light is coupled into two polarization modes of a waveguide, e.g., an optical fiber. The spectral response of Rayleigh backscatter in the waveguide segment for the two polarization modes is...
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7324189 |
Light power adjusting method, optical transmitter, and optical receiver
The present invention provides provide a light power adjusting method, an optical transmitter, and an optical receiver suitable for ensuring high data transmission quality by preventing the rapid...
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7317518 |
Determination of an optical property of a DUT by OTDR measurement
The present invention relates to an apparatus and to a method of determination of an optical property of a DUT, in particular of an optical fiber, by means of OTDR, comprising the steps of:...
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7317517 |
Birefringence profiler
A waveguide under test can be exposed to a light signal whose polarization rotates between the vertical and horizontal polarizations. The intensity detected at a photodetector can be separated into...
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7312859 |
Optical fiber inspection device
The present invention provides an inspection system for inspecting a surface of an optical specimen. The inspection system includes an optical testing device having a main body and an optical axis....
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7312858 |
Polarization dependency identification
Provided are a method, system, and device for passing a plurality of light beams though an array of waveguides wherein at least one waveguide is coupled to a test structure which exhibits an...
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7310135 |
System and method for monitoring an optical fiber
A system and method are disclosed for monitoring a fiber optic network between a managed location and a remote location. In a particular embodiment of the method the monitoring wavelength signal is...
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7310134 |
Device and method of optical fiber condition monitoring in optical networks
A device and method of optical fiber condition monitoring in optical networks is described. The front end of each branch of the optical network is installed with an optical filter that can filter...
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7304726 |
Auto distinction system
An auto distinction system images an assembled fiber band which continuously moves on the front side of a background plate applies sync-separating to a video signal by a sync-separating circuit 5...
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7304725 |
Optical time domain reflectometry
An optical time domain reflectometry apparatus for sensing a parameter in a region of interest is characterized in that the optical fiber includes a first section into which optical radiation at...
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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...
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7298934 |
Optical fiber and method of measuring polarization mode dispersion of optical fiber
A method of measuring polarization mode dispersion (PMD) of an optical fiber, includes estimating PMD when an optical fiber is formed as an optical cable, from a beat length when the optical fiber...
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7298465 |
Measurement and characterization of nonlinear phase shifts
Temporal phase shifts induced by cross-phase modulation in an optical fiber are directly characterized with a spectral equivalent of the Foucault technique used to spatially resolve wavefronts. The...
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7298464 |
System and method for measuring the phase noise of very long fiber optic links
A method for determining the phase noise of a fiber optic cable includes a step of transmitting a reference signal and a test signal over the fiber optic cable to be tested. The reference and test...
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7298463 |
Automated system and method for optical measurement and testing
A system and method for bit error rate testing optical components comprises providing an optical testing unit, which measures a bit error rate of an optical device under test (DUT) over an...
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7292323 |
Optical fiber detection method and system
An optical fiber detector, and a method and system for optical fiber detection are disclosed. One embodiment comprises a receptacle, to receive and position an optical fiber connector, an infra-red...
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7292322 |
Method for increasing accuracy of measurement of mean polarization mode dispersion
The present invention provides a method for increasing the accuracy of measurement of mean differential group delay (DGD) from the polarization mode dispersion (PMD) in optical fiber. The method...
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7289687 |
Polarization-maintaining optical fiber
A polarization-maintaining optical fiber which exhibits an excellent polarization-maintaining performance and significantly low splice loss when spliced with a polarization-maintaining optical...
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7289197 |
Transmissive optical detector
In this invention, a transmissive optical detector for low loss monitoring of transmitted optical power is described. The optical detector consists of a partially absorbing coating whose electrical...
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7284903 |
Distributed optical fibre measurements
A method of obtaining a distributed measurement comprises deploying an optical fibre in a measurement region of interest, and launching into it a first optical signal at a first wavelength λ 0 ...
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7283219 |
Interpretation system for interpreting reflectometry information
Interpretation systems for interpreting reflectometry information are provided with modules for making interpretations, with each module comprising a generating module-part, a testing module-part,...
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7280190 |
Electro-optic time domain reflectometry
Apparatuses, methods, and systems associated with and/or having components capable of, isolating defects in microelectronic packages are disclosed herein. In various embodiments, a defect-isolation...
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7280189 |
Method and apparatus for testing optical fiber based networks
A method offering the capacity for safe in service testing of optical network using time domain reflectometer is disclosed. The network utilizes end equipment devices having filters designed to...
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7280188 |
Method for the reflectometric testing of an optical transmission line, optical device and optical transmission and reception device
The invention relates to a method for the reflectometric testing of an optical transmission line from an optical transmission and reception device, in which a test signal is fed into the...
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7277162 |
Dynamic performance monitoring of long slender structures using optical fiber strain sensors
A method is described using optical fiber technology to measure the vibration characteristics of long slender structures subjected to dynamic disturbances imposed by water or wind generated loads....
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7274441 |
Natural fiber span reflectometer providing a virtual differential signal sensing array capability
A CW lightwave modulated by a continuously reiterated pseudorandom (PN) code sequence is launched into an end of a span of ordinary optical fiber cable. Portions of the launched lightwave back...
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7268342 |
Determination of optical properties of a device under test in both directions in transmission and in reflection
A method and a measurement setup for determination of optical properties of a device under test in both directions in transmission and in reflection, includes a coding device distinguishably coding...
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