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    MULTI-NECKDOWN FIBER OPTIC COUPLER
    31.
    发明公开
    MULTI-NECKDOWN FIBER OPTIC COUPLER 失效
    具有多VERJUNGUNGEN光纤耦合器

    公开(公告)号：EP0795141A4

    公开(公告)日：1998-04-15

    申请号：EP96932229

    申请日：1996-09-12

    Applicant: CORNING INC

    Inventor： WEIDMAN DAVID LEE

    IPC: G02B6/24 ,  G02B6/28 ,  G02B6/34 ,  G02B6/26

    CPC classification number: G02B6/2938 ,  G02B6/243 ,  G02B6/2856 ,  G02B6/29353 ,  G02B2006/2865

    Abstract: A unitary fiber optic coupling device (10) in which N fibers (16) (N>3) extend in a parallel array having two coupling regions (11, 12) of reduced cross-sectional area. At least one of the fibers (16) is formed of two sections that are situated end-to-end, an active core-containing fiber (47) section that is situated in the first coupling region and a dummy fiber section (52) that is situated in the second coupling region. The coupler also contains at least second and third fibers that are active core-containing fibers (47) throughout their lengths. The second and third fibers couple to one another in the first coupling region but remain uncoupled to one another in the second coupling region. Two fibers that couple in the first coupling region do not couple in the second coupling region, thus avoiding resonance effects.

    38.
    发明专利
    未知

    公开(公告)号：DE69519192D1

    公开(公告)日：2000-11-30

    申请号：DE69519192

    申请日：1995-04-18

    Applicant: CORNING INC

    Inventor： WEIDMAN DAVID LEE ,  YOUNG JR

    IPC: G02B6/02 ,  G02B6/26 ,  G02B6/28 ,  G02B6/287

    Abstract: A fiber optic coupler comprising a plurality of single-mode optical fibers, each of which is tapered to form a small diameter section that extends in contiguous relationship with the small diameter sections of the other fibers to form a coupling region. Each of the fibers has a core surrounded by a cladding of refractive index lower than that of the core. At least one of the fibers has a refractive index pedestal of refractive index ni between said core and cladding, wherein n1>ni>n2, n1 and n2 being the refractive indices of the core and cladding, respectively.

    39.
    发明专利
    未知

    公开(公告)号：DE69419568T2

    公开(公告)日：2000-01-13

    申请号：DE69419568

    申请日：1994-05-16

    Applicant: CORNING INC

    Inventor： MILLER WILLIAM JAMES ,  WEIDMAN DAVID LEE ,  NOLAN DANIEL ALOYSIUS

    IPC: G02B6/28

    Abstract: A low loss fiber optic coupler (31) of the type wherein a plurality of single-mode optical fibers (19,20) are fused together along a portion of the lengths thereof to form a coupling region (27). Each fiber (19,20) includes a core (20a) and a cladding (20b), the lowest refractive index of the fiber claddings (20b) being n2. Each of the output fibers (20) of the coupler (31) further includes a surface region (20c) of refractive index n4 that inhibits the coupling of light to lossy composite modes, n4 being lower than n2.

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