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    PLANAR OPTICAL WAVEGUIDES WITH PLANAR OPTICAL ELEMENTS
    45.
    发明专利
    PLANAR OPTICAL WAVEGUIDES WITH PLANAR OPTICAL ELEMENTS 未知

    公开(公告)号：CA2084248A1

    公开(公告)日：1993-08-25

    申请号：CA2084248

    申请日：1992-12-01

    Applicant: CORNING INC

    Inventor： BHAGAVATULA VENKATA A

    IPC: G02B6/122 ,  G02B6/13 ,  G02B6/28 ,  G02B6/12 ,  C03C15/00 ,  G02B6/10

    Abstract: A planar optical waveguide comprises a substrate 1, a waveguide core layer 2, at least one planar optical element, wherein said planar optical element comprises at least one optically functional interface 3 which is adjacent to a cavity 4, and an overclad layer 5. The cavity enhances the optical characteristics of the planar optical element because of the substantial difference in the refractive index of the cavity as compared to the refractive index of said waveguide core layer.

    47.
    发明专利
    未知

    公开(公告)号：DE69626359T2

    公开(公告)日：2003-10-16

    申请号：DE69626359

    申请日：1996-11-14

    Applicant: CORNING INC

    Inventor： BHAGAVATULA VENKATA A

    IPC: G02B6/028 ,  C03B37/075 ,  G02B6/036 ,  G02B6/16

    Abstract: A novel optical waveguide fiber having low total dispersion slope, relatively large mode field diameter, larger effective area, and a relatively simple core profile design is disclosed. The core refractive index profile comprises three segments (2,4,6). The adjustability of the height, width and location of the three core index profile segments, provides sufficient flexibility to meet a specification which calls for a dispersion shifted waveguide fiber capable of limiting four photon mixing or self phase modulation. The novel waveguide is characterized by a mode field diameter ≥ 7.5 microns and a total dispersion slope ≤ 0.070 ps/nm -km.

    OPTICAL FIBER WITH MULTIPLE LENSES DEVICE AND METHOD OF MANUFACTURE
    48.
    发明专利
    OPTICAL FIBER WITH MULTIPLE LENSES DEVICE AND METHOD OF MANUFACTURE 未知

    公开(公告)号：AU2003217951A1

    公开(公告)日：2003-09-22

    申请号：AU2003217951

    申请日：2003-03-04

    Applicant: CORNING INC

    Inventor： BHAGAVATULA VENKATA A ,  HIMMELREICH JOHN ,  SHASHIDHAR NAGARAJA

    IPC: G02B6/02 ,  G02B6/255 ,  G02B6/26 ,  G02B6/30 ,  G02B6/32 ,  G02B6/42

    Abstract: A multi-lens apparatus for altering the mode field of an optical signal is disclosed. The apparatus includes an optical fiber having a core region defining an optical axis and a GRIN-fiber lens positioned in relation to one end of the optical fiber. A biconic lens including an external surface defined by two different curves disposed substantially orthogonal to one another, a major curve C 1 and a minor curve C 2 , with C 1 and C 2 intersecting at or near the optical axis is positioned in relation to an end of the GRIN-fiber lens remote from the fiber. A method of manufacturing a multi-lens apparatus for altering the mode field of an optical signal, and an optical assembly are also disclosed.

    49.
    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 )
    50.
    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 _

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