公开(公告)号：CA2084217C

公开(公告)日：2005-01-25

申请号：CA2084217

申请日：1992-12-01

Applicant: CORNING INC

Inventor： ANTOS ANTHONY JOSEPH ,  BLANKENSHIP MICHAEL GREGG ,  HALL DOUGLAS WARREN ,  MURPHY EDWARD FRANCIS ,  SMITH DAVID KINNEY

IPC: G02B6/02 ,  G02B6/036 ,  H01S3/06 ,  H04B10/02 ,  H04B10/18 ,  G02B6/18

Abstract: Disclosed is a family of dispersion compensating optical fibers that are adapted for use with conventional single-mode transmission fibers that are optimized for zero dispersion operation at a wavelength in the range from 1290 nm to 1330 nm to form a transmission link suitable for low dispersion operation in the 1520-1565 nm wavelength window. The dispersion compensating fibers are capable of providing a dispersion more negative than -20 ps/nm-km and attenuation less than 1 dB/km at wavelengths in the 1520-1565 nm region. Certain of the dispersion compensating fibers also exhibit a dispersion versus wavelength relationship having a negative slope in the 1520-1565 nm region, to compensate for the dispersion versus wavelength slope of the trandsmission fiber. The dispersion compensating fiber can be advantageously combined with a fiber amplifier to form a compensator that is adapted to overcome attenuation introduced into the system by the dispersion compensating fiber. In one embodiment, the dispersion compensating fiber is also a distributed fiber amplifier.

公开(公告)号：AU733906B2

公开(公告)日：2001-05-31

申请号：AU4288397

申请日：1997-10-28

Applicant: CORNING INC

Inventor： BURTON CLEMENT DOWD ,  HALL DOUGLAS WARREN

IPC: H01S3/10 ,  G01F1/00 ,  G02B6/34 ,  H01S3/00 ,  H01S3/06 ,  H01S3/067 ,  H01S3/11 ,  H04B10/17 ,  H04J14/00 ,  H04J14/02 ,  G02B6/28 ,  G02B6/293 ,  H04B10/12

Abstract: An improved four-port dichroic WDM, for use in a multiwavelength, bi-directional optical amplifier, having a dichroic filter for substantially reflecting a first wavelength band input to the WDM to an output of the WDM for the first wavelength band and for substantially transmitting a second wavelength band input to the WDM to an output of the WDM for the second wavelength band, in which some of a first 3dB wavelength in the first wavelength band is transmitted by the filter and some of a second 3 dB wavelength in the second wavelength band is reflected by the filter, includes another dichroic filter having a filter function different than the filter function of the WDM filter providing an insertion loss for the first or the second 3 dB wavelengths sufficient to reflect and transmit, respectively, substantially all of the first and second 3 dB wavelengths. Additional dichroic filters for suppressing 3 dB light are used to prevent Q-switching in an optical gain cavity in a multiwavelength, bi-directional optical amplifier formed by a reflection point in an optical path connected to the amplifier.

公开(公告)号：DE69327120D1

公开(公告)日：2000-01-05

申请号：DE69327120

申请日：1993-01-20

Applicant: CORNING INC

Inventor： ANTOS ANTHONY JOSEPH ,  HALL DOUGLAS WARREN ,  BLANKENSHIP MICHAEL GREGG ,  MURPHY EDWARD FRANCIS ,  SMITH DAVID KINNEY

IPC: G02B6/02 ,  G02B6/036 ,  H01S3/06 ,  H04B10/02 ,  H04B10/18 ,  G02B6/16

Abstract: A silica based dispersion compensating optical waveguide fiber includes a core region and a surrounding clad layer. The core region has a refractive index profile which includes a central core region doped with an index raising dopant having a positive central core region index of refraction with a positive Delta %, surrounded by a core moat region having a negative moat region index of refraction with a negative Delta %. The clad layer has a clad index of refraction, said central core region index of refraction being greater than said clad index of refraction which is greater than said core moat region index of refraction. The fiber has a dispersion Ddcf more negative than -20 ps/nm-km at a given wavelength in the range of 1520nm to 1565nm, an attenuation at the given wavelength in the range of 1520nm to 1565nm less than 1 dB/km with a negative average dispersion slope Sdcf (ps/nm ) in the wavelength range of 1520nm to 1565nm, and the dispersion at the given wavelength in the range of 1520nm to 1565nm divided by the attenuation at the given wavelength in the range of 1520nm to 1565nm is more negative than -120 ps/nm-dB.

公开(公告)号：CA2128068C

公开(公告)日：1998-12-15

申请号：CA2128068

申请日：1994-07-14

Applicant: BARTHOLOMEW ROGER F ,  CORNING INC

Inventor： HALL DOUGLAS WARREN ,  JAKOBSON PAUL ANTHONY ,  SHARPS JULIA ALYSON ,  BARTHOLOMEW ROGER F

IPC: H01L33/48 ,  H01S5/00 ,  H01S5/022 ,  H01S3/18 ,  H01S3/025

Abstract: A package for a high power semiconductor laser comprising a hermetically sealed container filled with a dry gaseous medium containing oxygen. The package also may include a getter for organic impurities, e.g., a getter composed of a porous silica or a zeolite. The hydrogen content of the materials used to form the package can be reduced by baking at an elevated temperature for an extended period of time, e.g., at 150.degree.C for 200 hours.

公开(公告)号：HK9697A

公开(公告)日：1997-01-31

申请号：HK9697

申请日：1997-01-23

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.

公开(公告)号：DE69120402T2

公开(公告)日：1997-01-23

申请号：DE69120402

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.

公开(公告)号：ES2093669T3

公开(公告)日：1997-01-01

申请号：ES91120225

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.

公开(公告)号：AU672705B2

公开(公告)日：1996-10-10

申请号：AU6744094

申请日：1994-07-14

Applicant: CORNING INC

Inventor： HALL DOUGLAS WARREN ,  BARTHOLOMEW ROGER FRANK ,  JAKOBSON PAUL ANTHONY ,  SHARPS JULIA ALYSON

IPC: H01L33/48 ,  H01S5/00 ,  H01S5/022 ,  H01S3/00

Abstract: A package for a high power semiconductor laser comprising a hermetically sealed container filled with a dry gaseous medium containing oxygen. The package also may include a getter for organic impurities, e.g., a getter composed of a porous silica or a zeolite. The hydrogen content of the materials used to form the package can be reduced by baking at an elevated temperature for an extended period of time, e.g., at 150 DEG C for 200 hours.

公开(公告)号：DE69120402D1

公开(公告)日：1996-07-25

申请号：DE69120402

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.

公开(公告)号：DE69109672D1

公开(公告)日：1995-06-14

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.