1. Articles from Gerard A. Alphonse

    1-10 of 10

    1. Broadband Discrete Spectrum Optical Source

      Explore patentscope.wipo.int Patents , Broadband Sources
      Broadband Discrete Spectrum Optical Source

      A new broadband discrete spectrum light source comprising a gain medium placed in a feedback cavity is disclosed. A design for a feedback cavity including reflectors having raised-edge reflectivity is presented. Bandwidth enhancement is achieved by selectively enhancing the intensity of the discrete emission lines near the band edges of the gain medium spectrum. The bandwidth of a broadband discrete spectrum light source is further enhanced by digitally applying a spectral correction to each detected signal according to a predetermined correction profile. A combined effect of using a broadband discrete spectrum light source and applying spectral correction to the detected ...

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    2. Discrete spectrum broadband optical source

      Explore uspto.gov Patents , Broadband Sources
      Discrete spectrum broadband optical source

      A new broadband source having a discrete set of spectral emission lines having high peak power in each line is provided by placing a gain medium in a reflective cavity comprising reflective front and back surfaces. A cavity feedback factor less than unity is achieved by providing reflectivity of one surface substantially lower than the reflectivity of the other surface such that spontaneous emission in the gain medium is linearly amplified just below the lasing threshold. In an alternative arrangement, a movable external back surface placed at a prescribed distance from the gain medium provides a means to achieve a ...

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    3. Broadband discrete spectrum optical source

      Explore uspto.gov Patents , Broadband Sources
      Broadband discrete spectrum optical source

      A new broadband discrete spectrum light source comprising a gain medium placed in a feedback cavity is disclosed. A design for a feedback cavity including reflectors having raised-edge reflectivity is presented. Bandwidth enhancement is achieved by selectively enhancing the intensity of the discrete emission lines near the band edges of the gain medium spectrum. The bandwidth of a broadband discrete spectrum light source is further enhanced by digitally applying a spectral correction to each detected signal according to a predetermined correction profile. A combined effect of using a broadband discrete spectrum light source and applying spectral correction to the detected ...

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    4. Multi-channel low coherence interferometer

      Explore uspto.gov Patents
      A multi-channel low coherence interferometer having sensing and reference arms, at least one of which has variable delay. The sensing arm includes an optical switch for connecting to two or more probe arms. The distal ends of the probe arms collect source light backscattered from a sample. The backscattered light collected by the distal end of a probe arm is combined with reference light and a low coherence interferometric signal is produced by a sweep of a variable delay of the device or a sweep of a variable frequency laser light source. The interference signal produced by the interaction of ...
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      Mentions: Medeikon Corporation

    5. Single trace multi-channel low coherence interferometric sensor

      Explore uspto.gov Cardiology , Gastroenterology , Patents
      BACKGROUND AND SUMMARY In various fields of medicine and engineering it is often necessary to inspect surfaces that are difficult to reach. For example engine cylinders, compressors for jet aircraft engines, heat exchangers, internal organs, cavities, and arterialpassageways in a patient. Biomedical imaging technology, for example, magnetic resonance imaging, X-ray computed tomography, ultrasound, and confocal microscopy can be used to inspect and characterize a variety of tissues and organs. How
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      Mentions: Medeikon Corporation

    6. Low coherence interferometry utilizing magnitude

      Explore uspto.gov Patents
      A method for determining a characteristic of an analyte in a biological sample, the method comprising: directing broadband light by means of a sensing light path at the biological sample, at a target depth defined by the sensing light path and a reference light path; receiving the broadband light reflected from the biological sample by means of the sensing light path; directing the broadband light by means of the reference light path at a fixed reflecting device; and receiving the broadband light reflected from the fixed reflecting device by means of the reference light path. The method also includes interfering ...
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      Mentions: Medeikon Corporation

    7. Device for tissue characterization

      Explore uspto.gov Patents
      A probe for use in characterizing tissue. The probe includes a plurality of optical fibers and an optical element. Each fiber includes a distal portion and a proximal portion. The fibers transmit light through the fiber to a surrounding area and collect light reflected back from the surrounding area. The optical element may be adjacent an outer periphery of the distal portion of the plurality of optical fibers. The optical element reduces an optical path length through blood.
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      Mentions: Medeikon Corporation

    8. Low coherence interferometry for detecting and characterizing plaques

      Explore uspto.gov Cardiology , Patents
      A method for determining a characteristic of tissue in a biological sample comprising: directing light at the biological sample at a first depth and receiving that light reflected from the biological; directing the light at a reflecting device and receiving that light reflected from the reflecting device. The method also includes: interfering the light reflected from the biological sample and the light reflected from the reflecting device; detecting light resulting from the interfering; and determining a first phase associated with the light resulting from the interfering based on the first depth. The method further includes: varying an effective light path ...
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      Mentions: Medeikon Corporation

    9. Low coherence interferometry utilizing phase

      Explore uspto.gov Patents
      A method for determining a characteristic of an analyte in a biological sample, the method comprising: directing broadband light by means of a sensing light path at the biological sample, at a target depth defined by the sensing light path and a reference light path; and receiving the broadband light reflected from the biological sample by means of the sensing light path. The method also includes: directing the broadband light by means of the reference light path at a reflecting device; receiving the broadband light reflected from the reflecting device by means of the reference light path; and interfering the ...
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      Mentions: Medeikon Corporation

    10. Superluminescent diode and optical amplifier with extended bandwidth

      Explore uspto.gov Patents
      A superluminescent diode having emission layers which emit different wavelengths of light disposed side-by-side whereby light emitting in a first direction from an emission layer having a longer wavelength than an adjacent layer in the first direction is not absorbed. Thus, light of the different wavelengths is represented in an output spectra in the first direction at a point beyond the adjacent layer. A semiconductor optical amplifier is formed by creating a symmetrical structure in which the longest wavelength material is grown in the center and the shortest wavelength material is grown near the facets.
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      Mentions: Princeton Lightwave
    1-10 of 10
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