公开(公告)号：DE69528878D1

公开(公告)日：2003-01-02

申请号：DE69528878

申请日：1995-09-08

Applicant: CORNING INC

Inventor： QUINN RICHARD ALAN ,  SWAROOP LATHA IYENGAR ,  ROBSON CHRISTOPHER DAVID ,  WEIDMAN DAVID LEE

IPC: G02B6/28

Abstract: A method of making 1x2 or 2x2 overclad couplers, switches and the like such that the process is more reproducible and loss characteristics are improved. Such couplers are typically made by inserting the stripped portions of two active optical fibers (19,20) into a tube (10), heating the tube midregion to collapse it onto the fibers and stretching the central portion of the collapsed midregion to achieve the desired coupling characteristics. The improvement involves the insertion of one or two spacer (dummy) fibers (16) into the tube bore along with the active fibers to take up empty space that had been present in tube bore and to prevent an active fiber from sagging and crossing over the other fiber when the tube is heated during the tube collapse step.

公开(公告)号：DE69132794T2

公开(公告)日：2002-04-25

申请号：DE69132794

申请日：1991-12-20

Applicant: CORNING INC

Inventor： NEWHOUSE MARK ANDREW ,  WEIDMAN DAVID LEE

IPC: G02B6/255 ,  G02B6/28 ,  G02B6/287 ,  G02B6/34 ,  G02B6/42

公开(公告)号：DE69326041T2

公开(公告)日：1999-12-09

申请号：DE69326041

申请日：1993-06-16

Applicant: CORNING INC

Inventor： WEIDMAN DAVID LEE

IPC: G02B6/28

Abstract: An achromatic fiber optic coupler of the type wherein a plurality of 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. The propagation constants of the fibers are preferably equal; however if the fiber claddings have different refractive indices, the lowest cladding refractive index is n2. A matrix glass body of refractive index n3 surrounds the coupling region, n3 being lower than n2 by such an amount that the value of DELTA 2-3 is less than 0.125%, wherein DELTA 2-3 equals (n2 n3 )/2n2 .

公开(公告)号：DE69326041D1

公开(公告)日：1999-09-23

申请号：DE69326041

申请日：1993-06-16

Applicant: CORNING INC

Inventor： WEIDMAN DAVID LEE

IPC: G02B6/28

Abstract: An achromatic fiber optic coupler of the type wherein a plurality of 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. The propagation constants of the fibers are preferably equal; however if the fiber claddings have different refractive indices, the lowest cladding refractive index is n2. A matrix glass body of refractive index n3 surrounds the coupling region, n3 being lower than n2 by such an amount that the value of DELTA 2-3 is less than 0.125%, wherein DELTA 2-3 equals (n2 n3 )/2n2 .

公开(公告)号：DE69419568D1

公开(公告)日：1999-08-26

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.

公开(公告)号：CA2208003A1

公开(公告)日：1997-04-03

申请号：CA2208003

申请日：1996-09-12

Applicant: CORNING INC

Inventor： WEIDMAN DAVID LEE

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

Abstract: A unitary fiber optic coupling device (10) in which N fibers (16) (N3) extend in a parallel array having two coupling regions (11, 12) of reduced crosssectional 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.

公开(公告)号：AU669287B2

公开(公告)日：1996-05-30

申请号：AU6344994

申请日：1994-05-31

Applicant: CORNING INC

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

IPC: G02B6/28 ,  G02B6/24

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.

公开(公告)号：AU6344994A

公开(公告)日：1994-12-15

申请号：AU6344994

申请日：1994-05-31

Applicant: CORNING INC

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

IPC: G02B6/28 ,  G02B6/24

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.

公开(公告)号：AU653206B2

公开(公告)日：1994-09-22

申请号：AU1215992

申请日：1992-03-10

Applicant: CORNING INC

Inventor： HALL DOUGLAS WARREN ,  MILLER WILLIAM JAMES ,  WEBB THOMAS WILLIAM ,  WEIDMAN DAVID LEE

IPC: G02F1/35 ,  G02B6/28 ,  G02B6/287 ,  G02B6/34 ,  H01S3/06 ,  H01S3/067 ,  H01S3/07 ,  H01S3/094 ,  H01S3/10 ,  H01S3/17 ,  G02B6/26 ,  G02F1/39 ,  H04B10/16

Abstract: Disclosed is a fiber amplifier system in which a gain fiber is operatively combined with a fiber optic coupler having first and second coupler optical fibers. The coupler fibers are fused together along a portion of their lengths to form a wavelength dependent coupling region whereby most of the light power of a wavelength lambda s couples between them, and most of the light power of a wavelength lambda p that is introduced into the first fiber remains in it. The mode field diameter of the first coupler fiber is substantially matched to that of the gain fiber and is smaller than that of the second coupler fiber. One end of the first coupler fiber is spliced to the gain fiber. A transmission fiber is spliced to the second coupler fiber, and a laser diode introduces pumping light of wavelength lambda p to the first coupler fiber. The fiber optic coupler preferably includes an elongated body of matrix glass through which the first and second coupler fibers extend. The matrix glass has a refractive index n3 that is lower than that of the fiber claddings. The fibers are fused together along with the midregion of the matrix glass, the fiber cores being more closely spaced at the central portion of the midregion than at the body endfaces, thereby forming the coupling region.

公开(公告)号：AU1503792A

公开(公告)日：1992-11-05

申请号：AU1503792

申请日：1992-04-22

Applicant: CORNING INC

Inventor： NEWHOUSE MARK ANDREW ,  WEIDMAN DAVID LEE

IPC: G02B6/255 ,  G02B6/28 ,  G02B6/287 ,  G02B6/34 ,  G02B6/42 ,  H04B10/14