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    62.
    发明专利
    未知

    公开(公告)号：DE3527678A1

    公开(公告)日：1986-02-20

    申请号：DE3527678

    申请日：1985-08-01

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： DUNPHY JAMES RICHARD ,  MELTZ GERALD ,  SNITZER ELIAS

    IPC: G02B6/00 ,  G01B11/16 ,  G01L1/24 ,  G02B6/02

    Abstract: An optical strain measuring arrangement including an optical waveguide comprising first and second cores fixedly mounted with respect to a mechanical structure to be monitored, and a detection system for relating the contrast in light intensity emerging from said cores to a range of wavelengths to establish an indication of strain along the range of the optical waveguide.

    63.
    发明专利
    未知

    公开(公告)号：IT8521913D0

    公开(公告)日：1985-08-09

    申请号：IT2191385

    申请日：1985-08-09

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： DUNPHY JAMES RICHARD ,  MELTZ GERALD ,  SNITZER ELIAS

    IPC: G02B6/00 ,  G01B11/16 ,  G01L1/24 ,  G02B6/02 ,  H01P

    Abstract: An optical strain measuring arrangement including an optical waveguide comprising first and second cores fixedly mounted with respect to a mechanical structure to be monitored, and a detection system for relating the contrast in light intensity emerging from said cores to a range of wavelengths to establish an indication of strain along the range of the optical waveguide.

    TEMPERATURE COMPENSATED OPTICAL PRESSURE SENSOR
    64.
    发明专利
    TEMPERATURE COMPENSATED OPTICAL PRESSURE SENSOR 未知

    公开(公告)号：AU3301684A

    公开(公告)日：1985-07-04

    申请号：AU3301684

    申请日：1984-09-13

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： MELTZ GERALD ,  ALLEN LOUIS BENTON ,  FERRAR CARL MCALVAY

    IPC: G01L11/00 ,  G01L1/24 ,  G01L9/00 ,  G01L11/02

    Abstract: An integrated optical pressure transducer having a diaphragm fabricated from a low-loss glass is positioned at the location where pressure changes are to be measured. An optical waveguide loop formed on one surface of the diaphragm acts as a ring cavity in which the difference between the resonating frequencies varies with pressure but not with temperature. Light energy is coupled into the waveguide loop from an optical source through a tangentially located input waveguide. An output waveguide, also tangentially located, couples light energy from the waveguide loop to a broadband detector so that the changes in frequency spectrum of the resonating frequencies within the waveguide loop can be monitored.

    FIBER OPTIC STRAIN SENSOR
    65.
    发明专利
    FIBER OPTIC STRAIN SENSOR 未知

    公开(公告)号：CA1136881A

    公开(公告)日：1982-12-07

    申请号：CA358600

    申请日：1980-08-19

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： MELTZ GERALD ,  SNITZER ELIAS

    IPC: G01B11/16 ,  G01L1/24 ,  G01L11/02

    Abstract: Fiber Optic Strain Sensor An optical fiber having at least two cores positioned in a common cladding can be fabricated to be responsive to strain or hydrostatic pressure but not to temperature through the selection of materials, spacing and shape of the cores and cladding in the fiber. Accordingly, the cross-talk between adjacent cores in the optical waveguide can be optimized to respond to a change in hydrostatic pressure or in unidirectional strain along the length of the fiber. The strain or pressure change, can be determined by measuring the relative intensity of light emerging from the different cores of the fiber. A larger unambiguous range for strain or hydrostatic pressure changes can be provided by a multi-core optical fiber embodiment.

    66.
    发明专利
    未知

    公开(公告)号：DE69033359T2

    公开(公告)日：2000-02-24

    申请号：DE69033359

    申请日：1990-12-21

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： MOREY WILLIAM ,  LEONBERGER FRED ,  GLENN WILLIAM ,  MELTZ GERALD

    IPC: G02B26/00 ,  G02B6/34 ,  G02F1/01 ,  G02F1/125

    Abstract: A variable light filtering arrangement (10) includes at least one optical fiber section (11) including a waveguiding core (13), and at least one permanent Bragg grating region (12) in the optical fiber section. The grating region includes a plurality of grating elements constituted by periodic refractive index variations of a predetermined initial periodicity and cumulatively redirecting, of the light launched into the core for guided propagation therein, that having an axial wavelength within a narrow band around a central wavelength that is determined by the periodicity and refractive index variations of the grating elements. At least one of the periodicity and refractive index variations of the grating region is controlledly modified in such a manner as to temporarily change the central wavelength within a predetermined wavelength range.

    POLARIZED FIBER LASER SOURCE
    67.
    发明专利
    POLARIZED FIBER LASER SOURCE 未知

    公开(公告)号：CA2212444A1

    公开(公告)日：1996-09-06

    申请号：CA2212444

    申请日：1996-02-27

    Applicant: UNITED TECHNOLOGIES CORP

    Inventor： D AMATO FRANCIS X ,  BALL GARY A ,  MELTZ GERALD

    IPC: H01S3/07 ,  H01S3/067 ,  H01S5/00 ,  H01S3/00

    Abstract: A polarized fiber laser source includes a fiber laser (10) comprising a pair of Bragg gratings (14, 16) at opposite ends of a fiber laser cavity (18) which is doped with a rare-earth dopant so as to allow lasing to occur at a lasing wavelength .lambda.L. A grating tap (26) is provided along a portion of the laser cavity (18) to couple-out a predetermined amount of light along one polarization, e.g., the "s" polarization, at the lasing wavelength .lambda.L. This causes one polarization mode to experience more loss than the other, thereby allowing the fiber laser to lase only on the less lossy polarization mode and causing the laser output light (40) to be polarized only along such polarization.

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