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| Number | Title | Issue Date |
| 8154732 | Multiband spatial heterodyne spectrometer and associated methods A multiband spatial heterodyne spectrometer for determining spectra in first and second wavelength bands has a beam splitter configured to split incident light and to direct the incident light upon a first and a second diffraction grating. The gratings are configure... | 04/10/2012 |
| 8149419 | Optical reflectometry and optical reflectometer An object of the invention is to provide an optical reflectometry and an optical reflectometer, in which accurate measurement can be performed irrespective of a measurement distance. In the optical reflectometry and optical reflectometer according to the invention, ... | 04/03/2012 |
| 8064065 | Ultrafast chirped optical waveform recorder using referenced heterodyning and a time microscope A new technique for capturing both the amplitude and phase of an optical waveform is presented. This technique can capture signals with many THz of bandwidths in a single shot (e.g., temporal resolution of about 44 fs), or be operated repetitively at a high rate. Th... | 11/22/2011 |
| 7852486 | Wavelength and intensity monitoring of optical cavity According to various illustrative embodiments, a device, method, and system for measuring optical fine structure of lateral modes of an optical cavity are described. In one aspect, the device comprises at least one photodetector arranged to detect an output of the o... | 12/14/2010 |
| 7830526 | Method and apparatus for optical frequency measurement A method and an apparatus for optical frequency measurement, using one or two frequency-stabilized mode-locked laser combs operating at different repetition rates to mix with a laser under measurement (LUM) respectively so as to generate two beat frequencies. The or... | 11/09/2010 |
| 7817285 | Downhole uses of pressure-tuned semiconductor light sources An instrument for use in a borehole, the instrument including a pressure tuned light source disposed in a housing adapted for insertion into the borehole. ... | 10/19/2010 |
| 7738111 | Ultrafast chirped optical waveform recording using referenced heterodyning and a time microscope A new technique for capturing both the amplitude and phase of an optical waveform is presented. This technique can capture signals with many THz of bandwidths in a single shot (e.g., temporal resolution of about 44 fs), or be operated repetitively at a high rate. Th... | 06/15/2010 |
| 7715015 | Adaptive mixing for high slew rates A method and apparatus for demodulation of detected fringes from interferometric sensors with high slew rates are provided. A detected interference signal may be mixed with a local oscillator phasor to obtain a mixed signal, the local oscillator being controlled to ... | 05/11/2010 |
| 7705993 | Sampling of optical signals A method and device for sampling ultra-fast optical signals by generating a sampling signal comprising a train of short pulses and coupling the sampling signal together with an optical data signal to be sampled into a highly non-linear optical fiber. Four-wave mixin... | 04/27/2010 |
| 7630084 | System and method for acquiring and evaluating optical signals A system and method for measuring and evaluating optical signals for detecting an analyte in an analysis liquid. ... | 12/08/2009 |
| 7609385 | Method and apparatus for characterization of the response of optical devices Techniques for characterizing the response of an optical device comprising modulating at least one signal using the device; coupling the modulated signal with a reference signal in a variety of ways; detecting the coupled signals; and obtaining the response of the m... | 10/27/2009 |
| 7580132 | Optical device for measuring a doppler frequency shift The invention relates to a device for measuring a Doppler frequency shift, including an optical signal channel delivering a signal light beam illuminating a reference medium; and a reference channel delivering a reference light beam for detecting the Doppler frequen... | 08/25/2009 |
| 7564564 | Automatic set-up for instrument functions Machine-implemented methods and apparatuses to automatically set-up a signal processing system are described. The signal processing system is set to a first bandwidth. A sampling frequency of the signal processing system is set to a first sampling frequency. Next, f... | 07/21/2009 |
| 7557929 | Systems and methods for phase measurements Preferred embodiments of the present invention are directed to systems for phase measurement which address the problem of phase noise using combinations of a number of strategies including, but not limited to, common-path interferometry, phase referencing, active st... | 07/07/2009 |
| 7522285 | Method for determining the frequency response of an electrooptical component The aim of the invention is to provide a method for determining the frequency response of an electrooptical component, particularly, for example, of a light-generating or light-modulating component, which is easy to carry out. To this end, the invention provides a m... | 04/21/2009 |
| 7492464 | Triggering for a heterodyne interferometer A method for triggering a heterodyne interferometer having two acousto-optical modulators in separate light paths, a receiver generating an analog signal and a downstream A/D converter converting the analog signal into a digital signal is described. The one acousto-... | 02/17/2009 |
| 7450245 | Method and apparatus for measuring high-bandwidth electrical signals using modulation in an optical probing system A system for probing a DUT is provided, the system comprising a tunable or CW laser source, a modulator for modulating the output of the laser source, a beam optics designed to point a probing beam at a designated location on the DUT, optical detector for detecting ... | 11/11/2008 |
| 7426038 | Detection device, optical path length measurement device, measurement instrument, optical member evaluation method, and temperature change detection method An object of the invention is to provide a detection apparatus, an optical path length measuring apparatus, a method for evaluating an optical member, and the like, which can evaluate optical characteristics such as chromatic dispersion and an optical path length at... | 09/16/2008 |
| 7423763 | Faster processing of multiple spatially-heterodyned direct to digital holograms Systems and methods are described for faster processing of multiple spatially-heterodyned direct to digital holograms. A method includes of obtaining multiple spatially-heterodyned holograms, includes: digitally recording a first spatially-heterodyned hologram inclu... | 09/09/2008 |
| 7423759 | Wavelength determining device, wavelength meter equipped with the device, wavelength determining method, program, and recording medium There is provided a wavelength determining device including a reference wavelength measuring section 42 that, based upon a number A of interference fringes generated by an optical path difference of first reference wavelength light (wavelength: λ1) an... | 09/09/2008 |
| 7423760 | Method and apparatus for monitoring an interferometer An apparatus and to a method of monitoring an interferometer, comprising the steps of: coupling a first optical signal into the interferometer and into a wavelength reference element, detecting a first resulting interference signal being a result of interference of ... | 09/09/2008 |
| 7414729 | System and method for coherent anti-Stokes Raman scattering endoscopy A system is disclosed for detecting a signal field from a sample volume. The system includes a source system and an optical fiber system. The source system provides a first electromagnetic field at a first frequency and a second electromagnetic field at a second fre... | 08/19/2008 |
| 7411683 | Electric field measurement of optical waveforms Time magnification and heterodyning are combined to allow the single-shot characterization of the electric field of optical waveforms. The electric field of the source under test is obtained by Fourier processing of the magnified temporal intensity of the source het... | 08/12/2008 |
| 7405834 | Compensated coherent imaging for improved imaging and directed energy weapons applications An imaging method and associated system for producing high-resolution images. The method includes illuminating an object or scene with coherent radiation such as beams from a laser and then, collecting scattered light with a plurality of subapertures rather than a s... | 07/29/2008 |
| 7397568 | Coherent differential absorption lidar (dial) A coherent differential absorption lidar (DIAL) device 2 comprises a transmit portion 4 for directing a combined light beam to a remote target and a receive portion 5 for receiving light returned from the remote target and for coherently mixing ... | 07/08/2008 |
| 7388673 | Heterodyne optical spectrum analyzer A heterodyne optical signal analyzer (HOSA) permits accurate reconstruction of an optical input signal (Es) in the time domain. In one embodiment, a vector representation of the light is used to account for two polarization states of the optical signal. The componen... | 06/17/2008 |
| 7379672 | Photonic RF distribution system The present photonic RF generation and distribution system provides a system and method for distributing an RF output signal. The photonic RF distribution system includes two optical sources for generating optical signals. A first optical source (42) is opera... | 05/27/2008 |
| 7371517 | High purity X-chromosome bearing and Y-chromosome bearing populations of spermatozoa Isolated non-naturally occurring populations of spermatozoa (15) having high purity and technologies to differentiate spermatozoa (28) based on characteristics such as mass, volume, orientation, or emitted light including methods of analysis and appara... | 05/13/2008 |
| 7372576 | System and method for generating beams of light using an anisotropic acousto-optic modulator A light source system includes a beam source generating a first input beam of light with first and second beam components. The first component has a first linear polarization and a first frequency. The second component has a second linear polarization and a second f... | 05/13/2008 |
| 7370185 | Self-packaged optical interference display device having anti-stiction bumps, integral micro-lens, and reflection-absorbing layers An electronic device of an embodiment of the invention is disclosed that at least partially displays a pixel of a display image. The device includes a first reflector and a second reflector defining an optical cavity therebetween that is selective of a visible wavel... | 05/06/2008 |
| 7369774 | Optical frequency controlling device for ultra-dense wavelength-division-multiplexed optical channels Disclosed is an optical frequency controlling device for ultra-dense wavelength-division-multiplexed optical channels in which center frequencies of optical channels are aligned. An optical frequency controlling device for ultra-dense wavelength-division-multiplexed... | 05/06/2008 |
| 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, and a computer. The tunable laser source outputs light, frequencies of ... | 05/06/2008 |
| 7365858 | Systems and methods for phase measurements Preferred embodiments of the present invention are directed to systems for phase measurement which address the problem of phase noise using combinations of a number of strategies including, but not limited to, common-path interferometry, phase referencing, active st... | 04/29/2008 |
| 7362445 | Active control and detection of two nearly orthogonal polarizations in a fiber for heterodyne interferometry A polarization control system includes a light source that generates two light beams with different polarization states and optical frequencies. A polarization state modulator changes the polarization states of the two light beams. A first detector path generates a ... | 04/22/2008 |
| 7359063 | Heterodyne array detector A method and apparatus for correcting an input beam (102) that uses an array of detectors (114) sensing a scanning fringe pattern to generate phase error information which can be corrected by a physically adjacent beam correction device such as an arra... | 04/15/2008 |
| 7349100 | Recording multiple spatially-heterodyned direct to digital holograms in one digital image Systems and methods are described for recording multiple spatially-heterodyned direct to digital holograms in one digital image. A method includes digitally recording, at a first reference beam-object beam angle, a first spatially-heterodyned hologram including spat... | 03/25/2008 |
| 7349731 | Reconstructed refractive index spatial maps and method with algorithm The invention provides a means to produce reconstructed refractive index spatial maps that reveal and allow visual separation of normal soft tissue and certain types of tumors. Detector fiber optic bundles positioned on the surface of a soft tissue organ receive and... | 03/25/2008 |
| 7343099 | Free space optical (FSO) laser communication system employing fade mitigation measures based on laser beam speckle tracking and locking principles A free-space adaptive optical laser communication system having signal transmission and reception channels at all terminals in the communication system, wherein wavefront sensing and wavefront correction mechanisms are employed along signal transmission and receptio... | 03/11/2008 |
| 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 first moment in time. A measurement indicative of a value of the per... | 03/04/2008 |
| 7333213 | Confocal microscopy An improved confocal microscope system is provided which images sections of tissue utilizing heterodyne detection. The system has a synthesized light source for producing a single beam of light of multiple, different wavelengths using multiple laser sources. The bea... | 02/19/2008 |
