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    13.
    发明专利
    未知

    公开(公告)号：DE69621974T2

    公开(公告)日：2003-01-16

    申请号：DE69621974

    申请日：1996-04-09

    Applicant: CORNING INC

    Inventor： BERKEY GEORGE E ,  BHAGAVATULA VENKATA A ,  JONES PETER C ,  KECK DONALD B ,  LIU YANMING ,  MODAVIS ROBERT A ,  MORROW ALAN J ,  NEWHOUSE MARK A ,  NOLAN DANIEL A

    IPC: C03B37/012 ,  G02B6/00 ,  C03B37/014 ,  C03B37/018 ,  C03B37/02 ,  C03B37/027 ,  G02B6/02 ,  G02B6/028 ,  G02B6/036 ,  G02B6/16

    Abstract: A single-mode optical waveguide fiber designed to limit power penalty due to four wave mixing and a method of making the waveguide is disclosed. Variations in properties, e.g., radius or refractive index, of the waveguide fiber core provide a total dispersion which varies along the length of the waveguide. The algebraic sum of products of length times total dispersion is controlled to a pre-selected value for each waveguide fiber which makes up a system link. Proper choice of total dispersion variation magnitude and sub-length results in a system link wherein a signal travels only short distances in waveguide portions having total dispersion near zero. However, the variation of the total dispersion provides a system link which has a pre-selected dispersive effect on the signal over a selected wavelength range. The dispersive effect on the signal can be chosen to be essentially zero. A number of techniques for fabricating DM fiber are also disclosed.

    SINGLE-MODE FIBER-OPTICAL WAVEGUIDE WITH CONTROLLED DISPERSION AND PROCESS OF ITS MANUFACTURE ( VARIANTS )
    14.
    发明专利
    SINGLE-MODE FIBER-OPTICAL WAVEGUIDE WITH CONTROLLED DISPERSION AND PROCESS OF ITS MANUFACTURE ( VARIANTS ) 未知

    公开(公告)号：RU2178901C2

    公开(公告)日：2002-01-27

    申请号：RU96107903

    申请日：1996-04-10

    Applicant: CORNING INC

    Inventor： BERKEY GEORGE E ,  BHAGAVATULA VENKATA A ,  JONES PETER C ,  KECK DONALD B ,  LIU YANMING ,  MODAVIS ROBERT A ,  MORROW ALAN J ,  NEWHOUSE MARK A ,  NOLAN DANIEL A

    IPC: C03B37/012 ,  C03B37/014 ,  G02B6/00 ,  C03B37/018 ,  C03B37/02 ,  C03B37/027 ,  G02B6/02 ,  G02B6/028 ,  G02B6/036 ,  G02B6/16

    Abstract: electronics, optics. SUBSTANCE: single-mode fiber-optical waveguide is designed to diminish energy loss caused by four- wave shift. Waveguide includes region of glass core having profile of distribution of refractive index and surrounded by layer of glass jacket with refractive index nc less than at least part of profile of refractive index of specified region of glass core. Waveguide includes collection of sections along its length and has variable total dispersion which changes its sign from positive to negative and from negative to positive from one section to another section along length of waveguide. Variable total dispersion includes at least first total dispersion Di of one sign over some sections and second total dispersion Dj of opposite sign over other sections. Each section comprises segments ( (dli,dlj) ). Each segment has corresponding constant total dispersion ( (Di,Dj) ) and length of wave of zero dispersion lambda0 varies along length of waveguide between first range including wave lengths from 1480 to 1535 nm with total dispersion equal to Di and second range including wave lengths from 1565 to 1680 nm with total dispersion equal to Dj. Communication line in which sections of signal transmission having zero dispersion have small length is formed by proper selection of changes of values of total dispersion and lengths of sections. Change of total dispersion leads to fact that communication line exerts dispersion effect specified in advance on passing signal in specified range of lengths of waves. In agreement with invention properties of waveguide selected from group including geometry of waveguide, refractive index of waveguide, profile of distribution of waveguide and composition of waveguide are altered to change dispersion along length of waveguide. EFFECT: invention provides for reduction of optical losses and dispersion to specified value. 14 cl, 38 dwg _

    N-port reconfigurable dwdm multiplexer and demultiplexer
    17.
    发明专利
    N-port reconfigurable dwdm multiplexer and demultiplexer 未知

    公开(公告)号：AU2215199A

    公开(公告)日：1999-08-02

    申请号：AU2215199

    申请日：1999-01-07

    Applicant: CORNING INC

    Inventor： KECK DONALD B ,  NOLAN DANIEL A

    IPC: G02B6/12 ,  G02B6/293 ,  G02B6/34 ,  G02F1/01 ,  H04J14/02 ,  G02B6/26

    Abstract: An N-port optical wavelength division multiplexer and demultiplexer includes two evanescent wave couplers connected by N optical paths. Each of the optical paths includes wavelength-selecting elements that are used to select specific wavelengths of light. Light signals composed of N wavelengths of light introduced to an exterior port in one of the couplers are split substantially equally among all the optical paths within the coupler, so that each optical path exiting the coupler includes light of all the wavelengths initially introduced to the coupler. The wavelength selecting elements disposed on each optical path are situated to direct the light in a manner such that light of only the selected wavelengths interferes constructively at a given exterior coupler port and other wavelengths interfere destructively. Consequently, optical signals composed of N wavelengths may be demultiplexed such that N optical paths carry light having one wavelength. Conversely, N optical paths carrying light signals having only one wavelength can be multiplexed into a signal having wavelengths lambda 1, lambda 2, . . . lambda N. The multiplexed signal is then coupled into up to M+O exterior ports.

    18.
    发明专利
    未知

    公开(公告)号：BR9601344A

    公开(公告)日：1998-01-13

    申请号：BR9601344

    申请日：1996-04-12

    Applicant: CORNING INC

    Inventor： BERKEY GEORGE E ,  BHAGAVATULA VENKATA A ,  JONES PETER C ,  KECK DONALD B ,  LIU YANMING ,  MODAVIS ROBERT A ,  MORROW ALAN J ,  NEWHOUSE MARK A ,  NOLAN DANIEL A

    IPC: G02B6/00 ,  C03B37/012 ,  C03B37/014 ,  C03B37/018 ,  C03B37/02 ,  C03B37/027 ,  G02B6/02 ,  G02B6/028 ,  G02B6/036 ,  G02B6/18

    Abstract: A single-mode optical waveguide fiber designed to limit power penalty due to four wave mixing and a method of making the waveguide is disclosed. Variations in properties, e.g., radius or refractive index, of the waveguide fiber core provide a total dispersion which varies along the length of the waveguide. The algebraic sum of products of length times total dispersion is controlled to a pre-selected value for each waveguide fiber which makes up a system link. Proper choice of total dispersion variation magnitude and sub-length results in a system link wherein a signal travels only short distances in waveguide portions having total dispersion near zero. However, the variation of the total dispersion provides a system link which has a pre-selected dispersive effect on the signal over a selected wavelength range. The dispersive effect on the signal can be chosen to be essentially zero. A number of techniques for fabricating DM fiber are also disclosed.

    COAXIAL COUPLER WITH INTEGRATED SOURCE/RING DETECTOR
    20.
    发明专利
    COAXIAL COUPLER WITH INTEGRATED SOURCE/RING DETECTOR 未知

    公开(公告)号：CA2145127A1

    公开(公告)日：1995-10-29

    申请号：CA2145127

    申请日：1995-03-21

    Applicant: CORNING INC

    Inventor： KECK DONALD B ,  NOLAN DANIEL A ,  WEIDMAN DAVID L

    IPC: G02B6/122 ,  G02B6/26 ,  G02B6/28 ,  G02B6/34 ,  G02B6/42 ,  H01L31/173 ,  H04B10/12 ,  H04B10/135 ,  H04B10/14 ,  H04B10/2581 ,  H04B10/24

    Abstract: The invention features an optical two-way transmission-receiver communications system utilizing a coaxial coupler having a ring waveguide and a core waveguide. A surface of an integrated source/ring detector substrate is positioned adjacent said coaxial coupler endface. A ring detector on the substrate, which receives light transmissions from the ring waveguide, has an annular opening therein. A light source disposed on the substrate within the annular opening in the ring detector directs light transmissions to the core waveguide of the coaxial coupler. An alignment device positions the substrate with respect to the coaxial coupler so that the light source and detector are respectively aligned with the coaxial coupler core and ring waveguides.

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