OPTICAL FIBER CABLE HAVING MULTIPLE STACK OF OPTICAL FIBER RIBBON

    公开(公告)号:JP2001194566A

    公开(公告)日:2001-07-19

    申请号:JP2000279228

    申请日:2000-09-14

    Abstract: PROBLEM TO BE SOLVED: To provide an optical fiber cable incorporating different sized multiple stacks of optical fiber ribbons. SOLUTION: The stacks are composed of a central stack positioned at the nearly center within the passage of a jacket and peripheral stacks positioned radially around the central stack. The difference exists between the dimension of the central stack and the dimension of one or plural peripheral stacks. A buffer container individually incorporating the peripheral stacks is intertwined in the longitudinal direction around the central stack. Inner surfaces extending in the longitudinal direction are included in respective buffer containers, these inner surfaces extend around the passage extending in the longitudinal direction, and the passage is demarcated by these inner surfaces. Individual stacks are incorporated in the passage. The considerable parts in the periphery of respective peripheral stacks are surely bounded by respective inner surfaces which are meshed with these parts.

    OPTICAL FIBER
    3.
    发明专利

    公开(公告)号:JP2000111767A

    公开(公告)日:2000-04-21

    申请号:JP27206099

    申请日:1999-09-27

    Abstract: PROBLEM TO BE SOLVED: To provide a coating material which ensures little residue on the glass of glass fibers after peeling from an array of the glass fibers while maintaining satisfactory adhesion to the fibers so as not to cause delamination by specifying the equilibrium elastic modulus and tensile strength of a primary coating. SOLUTION: An optical fiber 10 coated with a primary coating material 14 comprising a photosetting polymer material has a slender glass fiber 12 capable of propagating light waves in the longitudinal direction. The primary coating has 120-500 psi equilibrium elastic modulus at 20 deg.C and

    MODE COUPLED BUFFERED OPTICAL FIBER DEVICE AND ITS PRODUCTION METHOD

    公开(公告)号:JP2001066475A

    公开(公告)日:2001-03-16

    申请号:JP2000218405

    申请日:2000-07-19

    Abstract: PROBLEM TO BE SOLVED: To obtain a novel optical energy transmission medium improved in mode coupling. SOLUTION: The optical energy transmission medium 10, such as an optical fiber, contains the foam 26 formed in this medium 10 in such a manner that the microbending of the medium 10 is induced, the advantageous mode coupling is thereby accelerated and consequently dispersion is lessened and the band-width potential is improved. The foam 26 is formed in >=1 layer of buffer region layer 22 and/or at the boundary between a coating region 16 and the buffer region 22. The process for producing the optical energy transmission medium consists controllably in forming >=1 layer of the buffer region layer around a coated optical fiber in such a form that a desired amount of the foam 26 is formed and held in >=1 layer of the buffer region layer 22 and/or the boundary between the coating region 16 and the buffer region 22. The foam 26 generates the prescribed perturbation to enhance the mode coupling to the extent that the band-width of the optical fiber is improved. The size and amount of the foam 26 are controlled by the moisture content in the coating layer.

    HARDENING OF COATED GLASS FIBER
    6.
    发明专利

    公开(公告)号:JPH10245245A

    公开(公告)日:1998-09-14

    申请号:JP649598

    申请日:1998-01-16

    Abstract: PROBLEM TO BE SOLVED: To greatly increase the speed of the production line of coated optical fiber. SOLUTION: The speed of production line of coated optical fiber can be greatly increased by adopting the divided lamp system for curing the coated optical fiber 21. The glass fiber is coated with a protecting coat layer, partially cured by exposure to the first electromagnetic radiation line source, then the partially cured layer is cooled and the coated layer is exposed to the second electromagnetic radiation line source. The curing station 30 is divided into plural steps and the cooling steps 35 are provided between individual curing stations. Thus, the partially cured optical fiber is cooled and the line-drawing speed of the optical fiber can be increased thereby largely increase the line speed of the coated optical fiber production as a result.

    MODE COUPLED BUFFERED OPTICAL FIBER DEVICE AND ITS PRODUCTION METHOD

    公开(公告)号:JP2001066474A

    公开(公告)日:2001-03-16

    申请号:JP2000218404

    申请日:2000-07-19

    Abstract: PROBLEM TO BE SOLVED: To obtain a novel optical energy transmission medium improved in mode coupling. SOLUTION: The optical energy transmission medium 10, such as an optical fiber, contains the plural particles formed in >=1 layer of coating layer enclosing a clad region and/or >=1 layer of buffer region layer 16 enclosing the coating layer. As a result, advantageous mode coupling is accelerated and consequently, the band-width potential lowered in dispersion is improved. This process for producing the optical energy transmission medium 10 consists in forming >=1 layer of the coating region layer and/or >=1 layer of the buffer region layer containing the particles in such a manner that the particles like those of fumed silica are maintained in the optical energy transmission medium and that the perturbation controlled along the optical fiber to enhance the mode coupling up to the extent of improving the band weight of the optical fiber is formed.

    COATED OPTICAL FIBER WIRE HAVING ONE OR MORE HETEROGENEOUS REGIONS AND PREPARATION OF THE SAME ARTICLE

    公开(公告)号:JP2000351654A

    公开(公告)日:2000-12-19

    申请号:JP2000133424

    申请日:2000-05-02

    Abstract: PROBLEM TO BE SOLVED: To prepare a coated fiber comprising one or more coating layers directly or indirectly located on a fiber wire and at least one heterogeneous region contained in or on the coating layers. SOLUTION: A heterogeneous region 4 comprises preferably a material useful for coding a fiber 1. A preferred example relates to an optical fiber having a first coating layer 2 and a second coating layer 3 and the heterogeneous region 4 defines two or more colored stripes in or on the second coating layer 3. A method for forming the coated optical fiber such as an optical fiber comprises a step of introducing at least the one coating layer 2 or 3 onto the surface of a fiber wire so that at least a part of the surface of the fiber wire is directly or indirectly coated with the one or more coating layers 2 and 3. The method further comprises a step of introducing at least the one heterogeneous region 4 into or onto the coating layers 2 and 3. The fiber can be subjected to, e.g. hardening so as to provide a desired product.

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