公开(公告)号：DE69303337T2

公开(公告)日：1997-02-13

申请号：DE69303337

申请日：1993-08-05

Applicant: CORNING INC

Inventor： YOUNG DONALD RAY

IPC: G02B6/28 ,  G02B6/26

Abstract: An overclad fiber optic coupler of the type wherein a plurality of optical optical fibers, each having a core and a cladding, are fused together along a portion of the lengths thereof to form a coupling region. Surrounding the coupling region is a matrix glass body of refractive index n3 which is lower than the fiber cladding refractive index n2. The body has an inner region adjacent the optical fibers, an outer region having a radius greater than that of the inner region, and a transition region between the inner and outer regions. The softening point temperature of the inner region is greater than that of the outer region. The coupler exhibits both low polarization dependent loss and low excess loss.

公开(公告)号：DE69303337D1

公开(公告)日：1996-08-01

申请号：DE69303337

申请日：1993-08-05

Applicant: CORNING INC

Inventor： YOUNG DONALD RAY

IPC: G02B6/28 ,  G02B6/26

Abstract: An overclad fiber optic coupler of the type wherein a plurality of optical optical fibers, each having a core and a cladding, are fused together along a portion of the lengths thereof to form a coupling region. Surrounding the coupling region is a matrix glass body of refractive index n3 which is lower than the fiber cladding refractive index n2. The body has an inner region adjacent the optical fibers, an outer region having a radius greater than that of the inner region, and a transition region between the inner and outer regions. The softening point temperature of the inner region is greater than that of the outer region. The coupler exhibits both low polarization dependent loss and low excess loss.

公开(公告)号：DE69216573D1

公开(公告)日：1997-02-20

申请号：DE69216573

申请日：1992-10-22

Applicant: CORNING INC

Inventor： CARPENTER NORMAN WILLARD ,  YOUNG DONALD RAY ,  MORROW ALAN JOHN

IPC: G02B6/26 ,  C03B37/014 ,  C03B37/028 ,  G02B6/28 ,  C03B32/00

Abstract: Disclosed is a method of forming a glass tube doped with boron and fluorine. A B2O3-doped tubular porous preform is heated, and a fluorine-containing gas is flowed into its aperture. The temperature is sufficiently high to cause the fluorine-containing gas to decompose and form fluorine which dopes the preform. Also flowed into the aperture is a sufficient amount of BF3 to prevent fluorine from reacting with the B2O3 in the porous preform and forming a B2O3-depleted region near the aperture surface. The particles are then fused to form a fluorine-containing dense glass tube.

公开(公告)号：DE69019684T2

公开(公告)日：1996-02-08

申请号：DE69019684

申请日：1990-10-31

Applicant: CORNING INC

Inventor： MILLER WILLIAM JAMES ,  TRUESDALE CARLTON MAURICE ,  WEIDMAN DAVID LEE ,  YOUNG DONALD RAY

IPC: G02B6/28 ,  G02B6/287

Abstract: An achromatic fiber optic coupler of the type wherein first and second single-mode optical fibers, each having a core and a cladding, are fused together along a portion of the lengths thereof to form a coupling region. A matrix glass of lower index than the fiber claddings surrounds the coupling region. The fiber diameters are smaller in the coupling region than in the the remainder of the fibers. The refractive index n2 of the cladding of the first fiber is different from the refractive index n'_2 of the cladding of the second fiber, the difference between the refractive indices n2 and n'_2 being such that the coupler exhibits very little change in coupling ratio with wavelength over a band of wavelengths.

公开(公告)号：DE69216573T2

公开(公告)日：1997-07-10

申请号：DE69216573

申请日：1992-10-22

Applicant: CORNING INC

Inventor： CARPENTER NORMAN WILLARD ,  YOUNG DONALD RAY ,  MORROW ALAN JOHN

IPC: G02B6/26 ,  C03B37/014 ,  C03B37/028 ,  G02B6/28 ,  C03B32/00

Abstract: Disclosed is a method of forming a glass tube doped with boron and fluorine. A B2O3-doped tubular porous preform is heated, and a fluorine-containing gas is flowed into its aperture. The temperature is sufficiently high to cause the fluorine-containing gas to decompose and form fluorine which dopes the preform. Also flowed into the aperture is a sufficient amount of BF3 to prevent fluorine from reacting with the B2O3 in the porous preform and forming a B2O3-depleted region near the aperture surface. The particles are then fused to form a fluorine-containing dense glass tube.

公开(公告)号：DE69019684D1

公开(公告)日：1995-06-29

申请号：DE69019684

申请日：1990-10-31

Applicant: CORNING INC

Inventor： MILLER WILLIAM JAMES ,  TRUESDALE CARLTON MAURICE ,  WEIDMAN DAVID LEE ,  YOUNG DONALD RAY

IPC: G02B6/28 ,  G02B6/287

Abstract: An achromatic fiber optic coupler of the type wherein first and second single-mode optical fibers, each having a core and a cladding, are fused together along a portion of the lengths thereof to form a coupling region. A matrix glass of lower index than the fiber claddings surrounds the coupling region. The fiber diameters are smaller in the coupling region than in the the remainder of the fibers. The refractive index n2 of the cladding of the first fiber is different from the refractive index n'_2 of the cladding of the second fiber, the difference between the refractive indices n2 and n'_2 being such that the coupler exhibits very little change in coupling ratio with wavelength over a band of wavelengths.