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公开(公告)号：JPH10301000A
公开(公告)日：1998-11-13
申请号：JP10637898
申请日：1998-04-16
Applicant: LUCENT TECHNOLOGIES INC
Inventor： TRAVIESO RUBEN , VIRIYAYUTHAKORN MONTRI
IPC: G02B6/44
Abstract: PROBLEM TO BE SOLVED: To provide a high density break-out cable used for wiring of optical fiber cable tuff against stress by being provided with a sub-unit sheath enclosing an entire ribbon structure in the ribbon bundle. SOLUTION: A single ribbon structure comprises each of plural optical fibers 12. The optical fibers 12 are desirable to be arrayed in a single optical layer, being adjacent to each other and provided with individual reinforcing members 14, 16 on the upper and bottom surfaces. A single ribbon structure 10 having the optical fibers 12 and the reinforcing members 14, 16 is enclosed with a ribbon protection sheath 18 insulating the ribbon. The reinforcing members 14, 16 are made of an elastic reinforcement, for example, braided tape material of aramid fiber can be used. When the cable is released from a spool and stretched, the reinforcing members 14, 16 absorb the stress exerted on the cable. Further, several single ribbon structures 10 are bundled together to be formed into a ribbon sub-unit, and enclosed with a sub-unit sheath.
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公开(公告)号：JPH11248985A
公开(公告)日：1999-09-17
申请号：JP36439998
申请日：1998-12-22
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CHAPIN J THOMAS , MATHIS TERRY D , VIRIYAYUTHAKORN MONTRI
Abstract: PROBLEM TO BE SOLVED: To recognize that an optical fiber gas optical loss in its early stage when the optical fiber cable is bent or handled roughly by providing a stress display means which is made of a polyphase material and discolors when stress is applied to the circumference of the optical fiber. SOLUTION: An optical fiber consisting of a core 10 and a clad layer 12 is arranged on the center of the cable. A thermoplastic buffer layer 14 is arranged around the clad layer 12. The cable is surrounded with a reinforcing material layer 16 and an external jacket 18. A stress display material layer 20 is present between the buffer layer 14 and reinforcing material layer 16. The stress display material layer 20 is formed of a multiphase material. The multiphase material when physically drawn or bent, changes in phase from some area to another area, and then varies in transparency to change color. The multiphase material is polyolefin, quenched or annealed nylon, etc.
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3.发明专利
公开(公告)号：JP2000356716A
公开(公告)日：2000-12-26
申请号：JP2000151547
申请日：2000-05-23
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BLYLER LEE L JR , HART ARTHUR CLIFFORD JR , SALAMON TODD R , VIRIYAYUTHAKORN MONTRI
IPC: G02B6/00 , B29C47/00 , B29C47/04 , B29C47/06 , B29C48/30 , B29D11/00 , G02B6/028 , B29C47/12 , G02B6/18
Abstract: PROBLEM TO BE SOLVED: To provide a process for extrusion-molding a graded refractive index plastic optical fiber and an apparatus therefor. SOLUTION: This extrusion molding process has a step of introducing a polymer material for a first core into a first nozzle and a step of introducing a polymer material for a second clad into a second nozzle. At least one polymer material has a dopant having a refractive index for changing the refractive index of the polymer material. The nozzles are concentrically arranged. The first nozzle exists within the second nozzle. When the materials are introduced into a diffusion part 22, the materials simultaneously flow concentrically and the diffusion of the dopant is embodied between the first material and the second material and eventually the graded refractive indices are embodied. The first and second polymer materials move continuously through the diffusion part 22 and flows through an outlet side die and are then drawn out as a fiber.
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公开(公告)号：JPH1068850A
公开(公告)日：1998-03-10
申请号：JP20068997
申请日：1997-06-23
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CHAPIN JOHN THOMAS , GRAHAM LIONELL , HOLMAN JAMES ROBERT , VIRIYAYUTHAKORN MONTRI
Abstract: PROBLEM TO BE SOLVED: To make it possible to easily peel buffer coating layers without damaging optical fibers in connection of buffer coated optical fibers by making the wall thickness of boundary layers larger than the specific ratio of the wall thickness of buffer coating material layers. SOLUTION: The buffer coated optical fiber 20 usually has a coated optical fiber 21 having a core and clad layer 22 and has at least one protective coating layers 23 around the core and clad layer 22. The buffer coated optical fiber 20 has also a jacket 30 known as the buffer coating layer. The buffer coating layer 30 is made of a plastic material, such as nylon or polyvinyl chloride. Further, the boundary layer 40 is placed between the coated optical fiber 21 and the buffer coating layer 30. The exact quantity of the material used for the boundary layer 40 depends on the specific characteristics of the material selected for the buffer coating layer 30. The wall thickness of the boundary layer 40 is made larger than about 1/250 the wall thickness of the buffer coating material layer 30.
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公开(公告)号：DE69735695T2
公开(公告)日：2006-08-31
申请号：DE69735695
申请日：1997-06-23
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CAHPIN JOHN THOMAS , HOLMAN JAMES ROBERT , GRAHAM LIONELL , VIRIYAYUTHAKORN MONTRI
Abstract: A buffered optical fiber (20) includes an optical fiber (21) comprising a core and a cladding. Typically, the optical fiber is enclosed by at least one layer (23) of coating material. The optical fiber is enclosed by a plastic buffer layer (30). Interposed between the optical fiber and the buffer layer is a boundary layer (40). Importantly, the boundary layer of the present invention is a low modulus material applied as a substantially thick layer relative to the buffer layer. In a preferred embodiment, the wall thickness of the boundary layer is about one-forth to one-third the wall thickness of the buffer layer. However, depending on the particular materials selected for the buffer and boundary layer, the wall thickness of the boundary layer can be as thin as one-twenty-fifth (1/25) of the buffer layer. As a result of the present design, there is sufficient adhesion between the buffer layer and the underlying coating material to maintain the buffer layer in place during normal use of the buffered optical fiber. On the other hand, the adhesion is low enough so that the buffer layer may be removed upon the application of reasonably low mechanical stripping forces. Advantageously, the boundary layer also allows the selective removal of the optical fiber coating material as well as the plastic buffer layer.
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Patent Agency Ranking
公开(公告)号：BR0002427A
公开(公告)日：2001-01-02
申请号：BR0002427
申请日：2000-05-18
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BLYLER LEE L JR , HART ARTHUR CLIFFORD JR , VIRIYAYUTHAKORN MONTRI , SALAMON TODD R
Abstract: A continuous extrusion process is provided capable of producing graded index plastic optical fiber at commercially useful speeds, e.g., at least 1 m/sec for 250 mu m outer diameter fiber. Moreover, it is possible to predict the refractive index profile of the fiber, prior to actual fabrication, by performing a finite element analysis using various parameters of the extrusion process. Such prediction allows one to tune the parameters of the process to obtain a desirable outcome, while avoiding the need for substantial trial and error with the extrusion equipment.
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公开(公告)号：AU3535900A
公开(公告)日：2000-11-30
申请号：AU3535900
申请日：2000-05-17
Applicant: LUCENT TECHNOLOGIES INC
Inventor： BLYLER LEE L JR , HART ARTHUR CLIFFORD JR , SALAMON TODD R , VIRIYAYUTHAKORN MONTRI
Abstract: A continuous extrusion process is provided capable of producing graded index plastic optical fiber at commercially useful speeds, e.g., at least 1 m/sec for 250 mu m outer diameter fiber. Moreover, it is possible to predict the refractive index profile of the fiber, prior to actual fabrication, by performing a finite element analysis using various parameters of the extrusion process. Such prediction allows one to tune the parameters of the process to obtain a desirable outcome, while avoiding the need for substantial trial and error with the extrusion equipment.
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公开(公告)号：CA2308661A1
公开(公告)日：2000-11-27
申请号：CA2308661
申请日：2000-05-17
Applicant: LUCENT TECHNOLOGIES INC
Inventor： SALAMON TODD R , HART ARTHUR CLIFFORD JR , BLYLER LEE L JR , VIRIYAYUTHAKORN MONTRI
IPC: G02B6/00 , B29C47/00 , B29C47/04 , B29C47/06 , B29C48/30 , B29D11/00 , G02B6/028 , C08J5/00 , G02B6/18
Abstract: A continuous extrusion process is provided capable of producing graded index plastic optical fiber at commercially useful speeds, e.g., at least 1 m/sec for 250 .mu.m outer diameter fiber. Moreover, it is possible to predict the refractive index profile of the fiber, prior to actual fabrication, by performing a finite element analysis using various parameters of the extrusion process. Such prediction allows one to tune the parameters of the process to obtain a desirable outcome, while avoiding the need for substantial trial and error with the extrusion equipment.
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公开(公告)号：CA2254805C
公开(公告)日：2003-08-05
申请号：CA2254805
申请日：1998-11-30
Applicant: LUCENT TECHNOLOGIES INC
Inventor： VIRIYAYUTHAKORN MONTRI , MATHIS TERRY DON , CHAPIN JOHN THOMAS
Abstract: A fiber optic cable having stress indicating means and a method for making s ame.The stress indicating means provides a cost effectiv e method for determining whether an optical cable has been bent, stressed or otherwise mishandled, which may cau se optical loss when the cable is placed in service. Broadly stated, the fiber optic ca ble according to the instant invention includes an optical fiber, comprised of a core and a cladding and a stress indicator concentrically disposed about the fiber that changes colo r when subjected to stress. A technician can thereby visually identify cables that have been bent or mishandled and subject them to testing before installation.
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公开(公告)号：DE69735695D1
公开(公告)日：2006-05-24
申请号：DE69735695
申请日：1997-06-23
Applicant: LUCENT TECHNOLOGIES INC
Inventor： CAHPIN JOHN THOMAS , HOLMAN JAMES ROBERT , GRAHAM LIONELL , VIRIYAYUTHAKORN MONTRI
Abstract: A buffered optical fiber (20) includes an optical fiber (21) comprising a core and a cladding. Typically, the optical fiber is enclosed by at least one layer (23) of coating material. The optical fiber is enclosed by a plastic buffer layer (30). Interposed between the optical fiber and the buffer layer is a boundary layer (40). Importantly, the boundary layer of the present invention is a low modulus material applied as a substantially thick layer relative to the buffer layer. In a preferred embodiment, the wall thickness of the boundary layer is about one-forth to one-third the wall thickness of the buffer layer. However, depending on the particular materials selected for the buffer and boundary layer, the wall thickness of the boundary layer can be as thin as one-twenty-fifth (1/25) of the buffer layer. As a result of the present design, there is sufficient adhesion between the buffer layer and the underlying coating material to maintain the buffer layer in place during normal use of the buffered optical fiber. On the other hand, the adhesion is low enough so that the buffer layer may be removed upon the application of reasonably low mechanical stripping forces. Advantageously, the boundary layer also allows the selective removal of the optical fiber coating material as well as the plastic buffer layer.
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