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| Number | Title | Issue Date |
| 8139225 | System for processing patient monitoring power and data signals A device interface selectively acquires patient physiological parameter data. An acquisition processor acquires physiological data from a patient. A communication processor is coupled to an optical communication pathway for receiving a plurality of optical signals f... | 03/20/2012 |
| 8139226 | Soft clock delay for OCT system and method therefor An optical coherence analysis system comprises a swept source laser for generating optical signals that are tuned over a scan band; an interferometer for transmitting the optical signals over a sample arm and reference arm and combining the optical signals; a k-cloc... | 03/20/2012 |
| 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 and is designed for guiding a measuring beam onto a measuring object... | 03/06/2012 |
| 8125645 | Optical tomographic imaging system, tomographic image acquiring method, and optical tomographic image forming method This optical tomographic imaging system comprises an optical path length adjustor configured to set a first reference position of a measurement depth direction to an inner edge of a measurement range by adjusting an optical path length of a reference light, and an o... | 02/28/2012 |
| 8120778 | Optical scanning and imaging systems based on dual pulsed laser systems The invention relates to scanning pulsed laser systems for optical imaging. Coherent dual scanning laser systems (CDSL) are disclosed and some applications thereof. Various alternatives for implementation are illustrated, including highly integrated configurations. ... | 02/21/2012 |
| 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 optical spectrum analyzing apparatus, wherein one arm, called “reference... | 10/18/2011 |
| 8004686 | Compensating for time varying phase changes in interferometric measurements An optical device under test (DUT) is interferometrically measured. The DUT can include one or more of an optical fiber, an optical component, or an optical system. First interference pattern data for the DUT is obtained for a first path to the DUT, and second inter... | 08/23/2011 |
| 7982879 | Methods and systems for performing angle-resolved fourier-domain optical coherence tomography Arrangements, apparatus and methods are provided according to exemplary embodiments of the present invention. In particular, at least one first electro-magnetic radiation may be received and at least one second electro-magnetic radiation within a solid angle may be ... | 07/19/2011 |
| 7961331 | Sensing a disturbance along an optical path The present invention relates to a system for sensing a disturbance in a sensing region along an optical path. The sensing system includes: a source of optical radiation; an upstream junction for channelling light along a first path and along a second path, the firs... | 06/14/2011 |
| 7936461 | All-optical fiber interferometer A compact and stable interferometer is easily built only with fusion splices. The air-holes of a microstructured fiber are intentionally collapsed in the vicinity of the splices and this broadens the propagating optical mode, allowing coupling from core to cladding ... | 05/03/2011 |
| 7929144 | Optical system and method for gas detection and monitoring A free-space optical path of an optical interferometer is disposed in an environment of interest. A light beam is guided to the optical interferometer using a single-mode optical fiber. The light beam traverses the interferometer's optical path. The light beam guide... | 04/19/2011 |
| 7916303 | Non-uniform sampling to extend dynamic range of interferometric sensors Methods and apparatus for interrogating optical sensors with high slew rates using non-uniform sampling are provided. The transmission of optical signals in a non-uniform pattern is employed to allow for demodulation of fringe rates exceeding the commonly understood... | 03/29/2011 |
| 7911621 | Apparatus and method for controlling ranging depth in optical frequency domain imaging Exemplary embodiments of an apparatus are provided. For example, the exemplary apparatus can include at least one first arrangement providing at least one first electro-magnetic radiation to a sample, at least one second electro-magnetic radiation to a first referen... | 03/22/2011 |
| 7911622 | System and method for using slow light in optical sensors An optical sensor includes at least one optical coupler and an optical waveguide in optical communication with the at least one optical coupler. The optical waveguide is configured to receive a first optical signal from the at least one optical coupler. The first op... | 03/22/2011 |
| 7847949 | Method and apparatus for optical imaging via spectral encoding Method, apparatus and arrangement according an exemplary embodiment of the present invention can be provided for generating an image of at least one portion of an anatomical structure. For example, the portion can have an area greater than about 1 mm2, and the image... | 12/07/2010 |
| 7835009 | Apparatus and method to detect and correct for mode hop wavelength error in optical component measurement systems A method of and system for correcting mode hop wavelength error in data obtained measuring optical characteristics over a number of wavelengths, includes at a location where mode hop wavelength error occurs in an assemblage of data, representing optical characterist... | 11/16/2010 |
| 7830524 | Optical tomograph using a plurality of wavelength-swept light beams An optical tomograph is equipped with: a light source unit for emitting a plurality of light beams, the wavelengths of which are swept within different predetermined wavelength bands respectively with the same period; light divider which divides each light beam into... | 11/09/2010 |
| 7812960 | Optical ultrasound device A new optical ultrasonic analysis transducer is described. The device includes a new detection means for the reflected ultrasound signal. The detector may be incorporated into a microchip design. The detector is compatible with a variety of material and design geome... | 10/12/2010 |
| 7787127 | System and method to determine chromatic dispersion in short lengths of waveguides using a common path interferometer The present invention relates to a system and method to determine chromatic dispersion in short lengths of waveguides using a two wave interference pattern and a common path interferometer. Specifically the invention comprises a radiation source operable to emit rad... | 08/31/2010 |
| 7768649 | System and method for ultrafast optical signal detecting via a synchronously coupled anamorphic light pulse encoded laterally In one general embodiment, a method for ultrafast optical signal detecting is provided. In operation, a first optical input signal is propagated through a first wave guiding layer of a waveguide. Additionally, a second optical input signal is propagated through a se... | 08/03/2010 |
| 7751056 | Optical coherence tomographic imaging apparatus An optical tomographic imaging apparatus capable of obtaining a high resolution tomographic image rapidly. In the apparatus, light beams having different wavelength ranges with portions of the ranges overlapping with each other are outputted from light source units,... | 07/06/2010 |
| 7719688 | Optical device and method of making the same An optical device includes a primary nanowire having a predetermined characteristic that affects an optical property of the primary nanowire. At least one secondary nanowire abuts the primary nanowire at a non-zero angle. The secondary nanowire(s) have another prede... | 05/18/2010 |
| 7675627 | Low cost fiber optic velocity sensor for sonar applications A fiber optic sensor includes a housing having first and second end plates with a sidewall extending therebetween with the sidewall having an inwardly facing groove. A flexural disk having a central passage therethrough has an outer edge portion mounted in the inwar... | 03/09/2010 |
| 7667849 | Optical sensor with interferometer for sensing external physical disturbance of optical communications link An optical sensing method transmits radiation from a source onto an optical link, the radiation being passed through an unbalanced interferometer connected between the source and the link. The radiation which is reflected back and has travelled through a portion of ... | 02/23/2010 |
| 7656535 | Optical system and method for inferring a disturbance The present invention relates to an disturbance sensing system, in particular an optical system in which a disturbance can be inferred. The system includes: a first waveguide portion and a second waveguide portion disposed in a side to side arrangement relative to o... | 02/02/2010 |
| 7612886 | Fiber-optic seismic sensor The invention relates to a fiber-optic seismic sensor (200) with a test body (110), characterized in that the test body (110) comprises several separate dishes (113, 114, 115, 116) that are distributed around the direction of the sensitiv... | 11/03/2009 |
| 7605923 | Embeddable polarimetric fiber optic sensor and method for monitoring of structures The present invention provides the capability of ascertaining, through a quick and simple measurement, locations on a structure that may have experienced damage that could result in reduced structure lifetime, strength, or reliability. The sensing element is a conne... | 10/20/2009 |
| 7551288 | System for monitoring bearing wear A system for determining at least one condition of a bearing including an optical fiber for transmitting light from a light source. The optical fiber is embedded in the bearing and operatively coupled to an interferometric system. The interferometric system is opera... | 06/23/2009 |
| 7538883 | Distributed strain and temperature discrimination in polarization maintaining fiber A portion of a polarization maintaining (PM) optical fiber having two polarization states is analyzed. First and second spectral responses of the PM fiber portion are determined. In a preferred implementation, the spectral responses are determined using Optical Freq... | 05/26/2009 |
| 7515273 | Method for measuring the brillouin shift distribution along an optical fiber based on the optical demodulation of the signals, and relevant apparatus The invention concerns a method for measuring the Brillouin shift distribution in optical fiber, comprising the launch of an optical pump signal from one end of the measurement fiber and an optical probe signal from the other end of the fiber, including: measuring f... | 04/07/2009 |
| 7505141 | Interferometric apparatus for producing an output signal characteristic of phase and/or amplitude noise of a device An interferometric apparatus (10) for producing an output signal characteristic of phase and/or amplitude noise of a device under test (22), an input signal being provided to the interferometric apparatus (10), comprising a signal generation mea... | 03/17/2009 |
| 7502119 | Thin-film metrology using spectral reflectance with an intermediate in-line reference Reflectance systems and methods are described that use information of an intermediate reference signal to continuously monitor, detect and/or compensate for drift in a metrology system. The intermediate reference signal is present regardless of whether a sample is b... | 03/10/2009 |
| 7440174 | Coherent fiber diffractive optical element beam combiner An optical beam combiner and a related method for its operation, in which multiple coherent input beams are directed onto a diffractive optical element (DOE) along directions corresponding to diffraction orders of the DOE, such that the DOE generates a single output... | 10/21/2008 |
| 7440110 | Optical sensing of measurands A chemical sensing probe comprises an optical fiber or may be mounted on an optical fiber. The probe has a chemically sensitive measuring material which exhibits a change in volume and/or a change in refractive index in the presence of a given chemical. The change i... | 10/21/2008 |
| 7433045 | Active coherence reduction for interferometer interrogation Methods and apparatus reduce coherence of an optical signal that is used to interrogate optical interferometric sensors. The optical field phasor of the interrogation source is modulated in a controlled manner to produce a broadened optical source power spectrum at ... | 10/07/2008 |
| 7426021 | Interferometric optical analyzer and method for measuring the linear response of an optical component An interferometric optical analyzer apparatus comprises a light source, an interferometer and a detection system for determining the linear response, and subsequently any optical parameter, of one or more optical elements using substantially unpolarized light. In on... | 09/16/2008 |
| 7414728 | Reconfigurable polarization independent interferometers and methods of stabilization A polarization independent (PI) interferometer design that can be built from standard optical components is described. Based upon a Michelson interferometer, the PI interferometer uses a 50/50 splitter and Faraday Rotator Mirrors (FM's). The interferometer achieves ... | 08/19/2008 |
| 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 arranged along a curvilinear optical path. This allows for determining... | 06/10/2008 |
| 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 self-phase modulation or cross phase modulation, using the measured samples. | 06/10/2008 |
| 7375818 | Optical tomography system In an optical tomography system for obtaining a tomographic image of an object to be measured by detecting interference light of the reflected light and the reference light, a controller switches between a first detecting mode in which the interference light is dete... | 05/20/2008 |
