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    OPTICAL FIBER AMPLIFIER WITH FILTER
    23.
    发明专利
    OPTICAL FIBER AMPLIFIER WITH FILTER 未知

    公开(公告)号：CA2057480C

    公开(公告)日：2002-01-29

    申请号：CA2057480

    申请日：1991-12-12

    Applicant: CORNING INC

    Inventor： CHARLTON DAVID EDWARD ,  COLE DOUGLAS REED ,  HALL DOUGLAS WARREN

    IPC: G02B6/00 ,  G02B6/34 ,  H01S3/06 ,  H01S3/067 ,  H01S3/07 ,  H01S3/094 ,  H01S3/10 ,  H01S3/17 ,  H01S3/13 ,  G02B5/22 ,  G02B6/26

    Abstract: Disclosed is a fiber amplifier system including a gain fiber having a single-mode core doped with active dopant ions capable of producing stimulated emission of light at wavelength .lambda.s when pumped with light of wavelength .lambda.p. Spliced to the gain fiber is a light-attenuating fiber having a core containing a dopant that attenuates light of wavelength .lambda.p but not .lambda.s. The amplifier is conventionally employed in a system including an incoming telecommunication fiber for introducing light of wavelength .lambda.s into an end of the gain fiber, the amplified signal being connected to an outgoing telecommunication fiber. The system further includes a pump source for introducing light of wavelength .lambda.p into an end of the gain fiber. Elements of the system can be arranged for forward pumping, counter pumping and dual ended pumping. Various interconnection schemes are disclosed for forming a series arrangement including the gain fiber, the attenuating fiber and the outgoing fiber.

    Optical fiber amplifier with filter
    25.
    发明专利
    Optical fiber amplifier with filter 未知

    公开(公告)号：SG48738A1

    公开(公告)日：1998-05-18

    申请号：SG1996001055

    申请日：1991-12-20

    Applicant: CORNING INC

    Inventor： CHARLTON DAVID EDWARD ,  COLE DOUGLAS REED ,  HALL DOUGLAS WARREN

    IPC: G02B6/00 ,  G02B6/34 ,  H01S3/06 ,  H01S3/067 ,  H01S3/07 ,  H01S3/094 ,  H01S3/10 ,  H01S3/17 ,  G02B6/24 ,  G02B6/26

    Abstract: Disclosed is a fiber amplifier system including a gain fiber having a single-mode core doped with active dopant ions capable of producing stimulated emission of light at wavelength lambda s when pumped with light of wavelength lambda p. Spliced to the gain fiber is a light-attenuating fiber having a core containing a dopant that attenuates light of wavelength lambda p but not lambda s. The amplifier is conventionally employed in a system including an incoming telecommunication fiber for introducing light of wavelength lambda s into an end of the gain fiber, the amplified signal being connected to an outgoing telecommunication fiber. The system further includes a pump source for introducing light of wavelength lambda p into an end of the gain fiber. Elements of the system can be arranged for forward pumping, counter pumping and dual ended pumping. Various interconnection schemes are disclosed for forming a series arrangement including the gain fiber, the attenuating fiber and the outgoing fiber.

    26.
    发明专利
    未知

    公开(公告)号：DE69122955D1

    公开(公告)日：1996-12-05

    申请号：DE69122955

    申请日：1991-11-27

    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

    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.

    27.
    发明专利
    未知

    公开(公告)号：ES2088452T3

    公开(公告)日：1996-08-16

    申请号：ES91121964

    申请日：1991-12-20

    Applicant: CORNING INC

    Inventor： CHARLTON DAVID EDWARD ,  COLE DOUGLAS REED ,  HALL DOUGLAS WARREN

    IPC: G02B6/00 ,  G02B6/34 ,  H01S3/06 ,  H01S3/067 ,  H01S3/07 ,  H01S3/094 ,  H01S3/10 ,  H01S3/17 ,  G02B6/24 ,  G02B6/26

    Abstract: Disclosed is a fiber amplifier system including a gain fiber having a single-mode core doped with active dopant ions capable of producing stimulated emission of light at wavelength lambda s when pumped with light of wavelength lambda p. Spliced to the gain fiber is a light-attenuating fiber having a core containing a dopant that attenuates light of wavelength lambda p but not lambda s. The amplifier is conventionally employed in a system including an incoming telecommunication fiber for introducing light of wavelength lambda s into an end of the gain fiber, the amplified signal being connected to an outgoing telecommunication fiber. The system further includes a pump source for introducing light of wavelength lambda p into an end of the gain fiber. Elements of the system can be arranged for forward pumping, counter pumping and dual ended pumping. Various interconnection schemes are disclosed for forming a series arrangement including the gain fiber, the attenuating fiber and the outgoing fiber.

    28.
    发明专利
    未知

    公开(公告)号：DE69109672T2

    公开(公告)日：1996-02-08

    申请号：DE69109672

    申请日：1991-12-19

    Applicant: CORNING INC

    Inventor： HALL DOUGLAS WARREN ,  NEWHOUSE MARK ANDREW

    IPC: G02B6/00 ,  H01S3/06 ,  H01S3/067 ,  H01S3/07 ,  H01S3/094 ,  H01S3/10 ,  H01S3/17 ,  H01S3/23 ,  H01S3/091 ,  H04B10/16 ,  G02B6/16 ,  G02F1/00

    Abstract: Disclosed is a fiber amplifier system including a gain fiber (10) having a single-mode core containing dopant ions capable of producing stimulated emission of light at wavelength lambda s when pumped with light of wavelength lambda p. Absorbing ion filtering means (17) is operatively associated with the gain fiber (10) to alter the gain curve. If the absorbing ions are the same as the gain ions of the gain fiber, the system further includes means for preventing pump light from exciting the gain ions of the filtering means (17). The excitation prevention means may take the form of means for attenuating pump light. If the absorbing ions are different from the dopant ions of the gain fiber, such absorbing ions can be subjected to light at wavelength lambda p, but they will remain unexcited. Such absorbing ions can be used to co-dope the gain fiber, or they can be incorporated into the core of a fiber that is in series with the gain fiber.

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