公开(公告)号：DE69034102T2

公开(公告)日：2004-07-29

申请号：DE69034102

申请日：1990-12-21

Applicant: UNITED TECHNOLOGIES CORP

Inventor： MOREY WILLIAM W ,  GLENN WILLIAM H ,  LEONBERGER FREDERICK J ,  MELTZ GERALD

IPC: G02B26/00 ,  G02B6/34 ,  G02F1/01 ,  G02F1/125 ,  G02B6/16

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.

公开(公告)号：DE69604569T2

公开(公告)日：2000-01-27

申请号：DE69604569

申请日：1996-02-27

Applicant: UNITED TECHNOLOGIES CORP

Inventor： D AMATO MARY ,  BALL GARY ,  MELTZ GERALD

IPC: H01S3/07 ,  H01S3/067 ,  H01S5/00 ,  H01S3/06 ,  H01S5/10

公开(公告)号：DE69033359D1

公开(公告)日：1999-12-23

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.

公开(公告)号：DE69602236T2

公开(公告)日：1999-08-19

申请号：DE69602236

申请日：1996-02-27

Applicant: UNITED TECHNOLOGIES CORP

Inventor： BALL GARY ,  MELTZ GERALD

IPC: G02B6/024 ,  G02B6/02 ,  G02B6/126 ,  H01S3/06 ,  H01S3/067 ,  H01S3/10 ,  G02B6/12

Abstract: A single polarization fiber and/or amplifier includes a non-polarization preserving fiber 10 having a fiber grating tap 12 which has a predetermined length and strength ( DELTA n/n) and is oriented at a predetermined angle theta and has a grating spacing D so as to couple-out of the fiber 10 a predetermined amount of one polarization 24 over a predetermined wavelength range of an input light 16 and pass the other polarization 28 as output light 26, the grating length being substantially the length of the fiber 10. Alternatively, all or a portion of the fiber 10 may be doped to form a polarization sensitive optical amplifier.

公开(公告)号：DE3587641T2

公开(公告)日：1994-02-17

申请号：DE3587641

申请日：1985-07-31

Applicant: UNITED TECHNOLOGIES CORP

Inventor： MELTZ GERALD ,  GLENN WILLIAM ,  SNITZER ELIAS

IPC: G01L1/24 ,  G01B11/16 ,  G01D5/353 ,  G01K5/52 ,  G01K11/12 ,  G01J5/08 ,  G01J5/38

公开(公告)号：AU572189B2

公开(公告)日：1988-05-05

申请号：AU3301684

申请日：1984-09-13

Applicant: UNITED TECHNOLOGIES CORP

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

IPC: G01L11/00 ,  G01L1/24 ,  G01L9/00 ,  G01L11/02 ,  G02B5/172

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.

公开(公告)号：NO157434C

公开(公告)日：1988-03-16

申请号：NO811426

申请日：1981-04-28

Applicant: UNITED TECHNOLOGIES CORP

Inventor： MELTZ GERALD ,  SNITZER ELIAS

IPC: G01B20060101 ,  G01B11/16 ,  G01L20060101 ,  G01L1/24 ,  G01B11/18

公开(公告)号：IT1175757B

公开(公告)日：1987-07-15

申请号：IT2290384

申请日：1984-09-28

Applicant: UNITED TECHNOLOGIES CORP

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

IPC: G01L11/00 ,  G01L1/24 ,  G01L9/00 ,  G01L11/02 ,  G01L

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.

公开(公告)号：CA1220048A

公开(公告)日：1987-04-07

申请号：CA459286

申请日：1984-07-19

Applicant: UNITED TECHNOLOGIES CORP

Inventor： MELTZ GERALD ,  ALLEN LOUIS B JR ,  FERRAR CARL M

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

Abstract: Temperature Compensated Optical Pressure Sensor 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.

公开(公告)号：FI71842B

公开(公告)日：1986-10-31

申请号：FI802733

申请日：1980-08-29

Applicant: UNITED TECHNOLOGIES CORP

Inventor： MELTZ GERALD ,  SNITZER ELIAS

IPC: G01B11/16 ,  G01L1/24 ,  G01L11/00 ,  G01L11/02 ,  G08C23/00

Abstract: 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.