Ray Robinson

US Patent:

6490889, Dec 10, 2002

Filed:

Dec 21, 2000

Appl. No.:

09/745954

Inventors:

Ying-Hua Zhang - Waltham MA
Brian M. Laliberte - Winchester MA
Ray F. Robinson - Wilmington MA

Assignee:

JDS Uniphase Corporation - San Jose CA

International Classification:

C03B 37075

US Classification:

65390, 65388, 65389, 65399, 65417, 65418

Abstract:

A method and apparatus are disclosed for the manufacture of an optical fiber preform having incorporated therein a comparatively high concentration of rare earth dopant material, and which thus can be drawn and processed into an optical fiber having low numerical aperture, low core attenuation, and high pumping power absorption. The high concentrations of rare earth dopant material are accomplished through either the âhybrid vapor processingâ (HVP) method or a âhybrid liquid processingâ (HLP) method, each capable of being practiced in combination or independently of one another. The HVP method involves the vaporization of a rare earth halogen by the exposure thereof to a sufficiently elevated temperature, independently, or contemporaneously with the transport of the resultant rare earth halogen laden vapor, into a glass forming oxidation reaction zone on a flowing stream of essentially an unreactive inert gas, such as helium. According to the HLP method, a first amount of rare earth dopant is provided according to the HVP method and/or other vapor source of rare earth dopant which is mixed with glass forming vapors to form a deposited soot layer on the internal surface of a glass tube. The soot-deposited tube is then impregnated with a dopant solution which may be formulated with a second amount of rare earth dopant.

US Patent:

6510710, Jan 28, 2003

Filed:

Jan 17, 2001

Appl. No.:

09/764912

Inventors:

Ying-Hua Zhang - Sharon MA
Brian M. Laliberte - Winchester MA
Ray F. Robinson - Wilmington MA

Assignee:

JDS Uniphase Corporation - San Jose CA

International Classification:

C03B 37075

US Classification:

65390, 65388, 65389, 65399, 65417, 65418

Abstract:

A method and apparatus are disclosed for the manufacture of an optical fiber preform having incorporated therein a comparatively high concentration of rare earth dopant material, and which thus can be drawn and processed into an optical fiber having low numerical aperture, low core attenuation, and high pumping power absorption. The high concentrations of rare earth dopant material are accomplished through either the âhybrid vapor processingâ (HVP) method or a âhybrid liquid processingâ (HLP) method, each capable of being practiced in combination or independently of one another. The HVP method involves the vaporization of a rare earth halogen by the exposure thereof to a sufficiently elevated temperature, independently, or contemporaneously with the transport of the resultant rare earth halogen laden vapor, into a glass forming oxidation reaction zone on a flowing stream of essentially an unreactive inert gas, such as helium. According to the HLP method, a first amount of rare earth dopant is provided according to the HVP method and/or other vapor source of rare earth dopant which is mixed with glass forming vapors to form a deposited soot layer on the internal surface of a glass tube. The soot-deposited tube is then impregnated with a dopant solution which may be formulated with a second amount of rare earth dopant.

US Patent:

6523369, Feb 25, 2003

Filed:

Jan 18, 2001

Appl. No.:

09/766121

Inventors:

Ying-Hua Zhang - Waltham MA
Brian M. Laliberte - Winchester MA
Ray F. Robinson - Wilmington MA

Assignee:

JDS Uniphase Corporation - San Jose CA

International Classification:

C03B 37018

US Classification:

65419, 65390, 65395, 65399, 65415, 65416, 65427, 65428

Abstract:

A method and apparatus are disclosed for the manufacture of an optical fiber preform having incorporated therein a comparatively high concentration of rare earth dopant material, and which thus can be drawn and processed into an optical fiber having low numerical aperture, low core attenuation, and high pumping power absorption. The high concentrations of rare earth dopant material are accomplished through either the âhybrid vapor processingâ (HVP) method or a âhybrid liquid processingâ (HLP) method, each capable of being practiced in combination or independently of one another. The HVP method involves the vaporization of a rare earth halogen by the exposure thereof to a sufficiently elevated temperature, independently, or contemporaneously with the transport of the resultant rare earth halogen laden vapor, into a glass forming oxidation reaction zone on a flowing stream of essentially an unreactive inert gas, such as helium. According to the HLP method, a first amount of rare earth dopant is provided according to the HVP method and/or other vapor source of rare earth dopant which is mixed with glass forming vapors to form a deposited soot layer on the internal surface of a glass tube. The soot-deposited tube is then impregnated with a dopant solution which may be formulated with a second amount of rare earth dopant.

US Patent:

6532774, Mar 18, 2003

Filed:

Jan 17, 2001

Appl. No.:

09/764938

Inventors:

Ying-Hua Zhang - Waltham MA
Brian M. Laliberte - Winchester MA
Ray F. Robinson - Wilmington MA

Assignee:

JDS Uniphase Corporation - San Jose CA

International Classification:

C03B 37075

US Classification:

65390, 65399, 65417, 65418, 65419, 65426

Abstract:

A method and apparatus are disclosed for the manufacture of an optical fiber preform having incorporated therein a comparatively high concentration of rare earth dopant material, and which thus can be drawn and processed into an optical fiber having low numerical aperture, low core attenuation, and high pumping power absorption. The high concentrations of rare earth dopant material are accomplished through either the âhybrid vapor processingâ (HVP) method or a âhybrid liquid processingâ (HLP) method, each capable of being practiced in combination or independently of one another. The HVP method involves the vaporization of a rare earth halogen by the exposure thereof to a sufficiently elevated temperature, independently, or contemporaneously with the transport of the resultant rare earth halogen laden vapor, into a glass forming oxidation reaction zone on a flowing stream of essentially an unreactive inert gas, such as helium. According to the HLP method, a first amount of rare earth dopant is provided according to the HVP method and/or other vapor source of rare earth dopant which is mixed with glass forming vapors to form a deposited soot layer on the internal surface of a glass tube. The soot-deposited tube is then impregnated with a dopant solution which may be formulated with a second amount of rare earth dopant.

US Patent:

6604388, Aug 12, 2003

Filed:

Dec 21, 2000

Appl. No.:

09/745953

Inventors:

Ying-Hua Zhang - Waltham MA
Brian M. Laliberte - Winchester MA
Ray F. Robinson - Wilmington MA

Assignee:

JDS Uniphase Corporation - San Jose CA

International Classification:

C03C 2502

US Classification:

65529, 65388, 65389, 65390, 65399, 65417, 65418

Abstract:

A method and apparatus are disclosed for the manufacture of an optical fiber preform having incorporated therein a comparatively high concentration of rare earth dopant material, and which thus can be drawn and processed into an optical fiber having low numerical aperture, low core attenuation, and high pumping power absorption. The high concentrations of rare earth dopant material are accomplished through either the âhybrid vapor processingâ (HVP) method or a âhybrid liquid processingâ (HLP) method, each capable of being practiced in combination or independently of one another. The HVP method involves the vaporization of a rare earth halogen by the exposure thereof to a sufficiently elevated temperature, independently, or contemporaneously with the transport of the resultant rare earth halogen laden vapor, into a glass forming oxidation reaction zone on a flowing stream of essentially an unreactive inert gas, such as helium. According to the HLP method, a first amount of rare earth dopant is provided according to the HVP method and/or other vapor source of rare earth dopant which is mixed with glass forming vapors to form a deposited soot layer on the internal surface of a glass tube. The soot-deposited tube is then impregnated with a dopant solution which may be formulated with a second amount of rare earth dopant.

US Patent:

20020088252, Jul 11, 2002

Filed:

Jan 17, 2001

Appl. No.:

09/764648

Inventors:

Ying-Hua Zhang - Waltham MA, US
Brian Laliberte - Winchester MA, US
Ray Robinson - Wilmington MA, US

International Classification:

C03B037/075

US Classification:

065/390000

Abstract:

A method and apparatus are disclosed for the manufacture of an optical fiber preform having incorporated therein a comparatively high concentration of rare earth dopant material, and which thus can be drawn and processed into an optical fiber having low numerical aperture, low core attenuation, and high pumping power absorption. The high concentrations of rare earth dopant material are accomplished through either the “hybrid vapor processing” (HVP) method or a “hybrid liquid processing” (HLP) method, each capable of being practiced in combination or independently of one another. The HVP method involves the vaporization of a rare earth halogen by the exposure thereof to a sufficiently elevated temperature, independently, or contemporaneously with the transport of the resultant rare earth halogen laden vapor, into a glass forming oxidation reaction zone on a flowing stream of essentially an unreactive inert gas, such as helium. According to the HLP method, a first amount of rare earth dopant is provided according to the HVP method and/or other vapor source of rare earth dopant which is mixed with glass forming vapors to form a deposited soot layer on the internal surface of a glass tube. The soot-deposited tube is then impregnated with a dopant solution which may be formulated with a second amount of rare earth dopant. The tube is then thermally collapsed resulting in an optical preform with a an enhanced amount of incorporated first and second amounts of rare earth dopant.

US Patent:

61927139, Feb 27, 2001

Filed:

Jun 30, 1999

Appl. No.:

9/340473

Inventors:

Ying-Hua Zhang - Waltham MA
Brian M. Laliberte - Winchester MA
Ray F. Robinson - Wilmington MA

Assignee:

SDL, Inc. - San Jose CA

International Classification:

C03B 37075
C03C 1300
G02B 600

US Classification:

65390

Abstract:

A method and apparatus is disclosed for the manufacture of an optical fiber preform having incorporated therein a comparatively high concentration of rare earth dopant material, and which thus can be drawn and processed into an optical fiber having low numerical aperture, low core attenuation, and high pumping power absorption. The high concentrations of rare earth dopant material are accomplished through either the "hybrid vapor processing" (HVP) method or a "hybrid liquid processing" (HLP) method, each capable of being practiced in combination or independently of one another. The HVP method involves the vaporization of a rare earth halogen by the exposure thereof to a sufficiently elevated temperature, independently, or contemporaneously with the transport of the resultant rare earth halogen laden vapor, into a glass forming oxidation reaction zone on a flowing stream of essentially an unreactive inert gas, such as helium. According to the HLP method, a first amount of rare earth dopant is provided according to the HVP method and/or other vapor source of rare earth dopant which is mixed with glass forming vapors to form a deposited soot layer on the internal surface of a glass tube. The soot-deposited tube is then impregnated with a dopant solution which may be formulated with a second amount of rare earth dopant.