摘要:
A method of manufacturing an optical fiber includes a first step of drawing an optical fiber preform into a glass fiber and disposing a fiber coating on the outer circumference of the glass fiber to form a parent optical fiber; a second step of cutting the parent optical fiber into a plurality of individual optical fibers; a third step of determining, at, at least, one spot of the parent optical fiber, a failure strength F1 and a failure time T; a fourth step of determining a failure strength F2 of each of the individual optical fibers; and a fifth step of selecting an optical fiber having a failure strength F2 of 5.5 kgf or more from the individual optical fibers cut from the parent optical fiber whose failure strength F1 and failure time T satisfy the inequality T>2.6×10−11×exp(4.736×F1).
摘要:
A trench optical fiber that stably realizes a small transmission loss includes (1) a core extending in an axial direction while containing an axial center of the fiber, the core having a diameter d1 of 7.0 μm to 7.4 μm; (2) a first optical cladding layer surrounding the core and having an outside diameter d2 of 1.67 dl to 2.5 dl; (3) a second optical cladding layer surrounding the first optical cladding layer; and (4) a jacket layer surrounding the second optical cladding layer and containing fluorine having a concentration of 0.06 wt % or higher. A relative refractive index difference Δ1 of the core with respect to the jacket layer is 0.31% to 0.37%. A relative refractive index difference Δ2 of the first optical cladding layer with respect to the jacket layer is +0.02% or larger and smaller than Δ1. A relative refractive index difference Δ3 of the second optical cladding layer with respect to the jacket layer is −0.2% or smaller.
摘要:
There is provided an optical transmission line that includes a bend insensitive fiber (BIF) defined by ITU-T Recommendation G.657 and that reduces the influence of MPI. An optical transmission line 1 includes a first optical fiber 11, a second optical fiber 12 joined to an incident end of the first optical fiber 11, and a third optical fiber 13 joined to an exit end of the first optical fiber 11. The first optical fiber 11 is a bend insensitive fiber (BIF), and each of the second optical fiber 12 and the third optical fiber 13 is a general single mode optical fiber. An attenuation coefficient of an LP11 mode in the first optical fiber 11 at a wavelength of 1310 nm, a splice loss between the first optical fiber and the second optical fiber, a splice loss between the first optical fiber and the third optical fiber, and a length of the first optical fiber satisfy a predetermined relational equation.
摘要:
A method of manufacturing an optical fiber includes a first step of drawing an optical fiber preform into a glass fiber and disposing a fiber coating on the outer circumference of the glass fiber to form a parent optical fiber; a second step of cutting the parent optical fiber into a plurality of individual optical fibers; a third step of determining, at, at least, one spot of the parent optical fiber, a failure strength F1 and a failure time T; a fourth step of determining a failure strength F2 of each of the individual optical fibers; and a fifth step of selecting an optical fiber having a failure strength F2 of 5.5 kgf or more from the individual optical fibers cut from the parent optical fiber whose failure strength F1 and failure time T satisfy the inequality T>2.6×10−11×exp(4.736×F1).
摘要:
The present invention aims to provide a particulate formulation with an effectively controlled dissolution characteristic of a drug even if the average particle diameter is small. The present invention provides a particulate formulation containing drug particles and a first coating layer coating the drug particles and characterized in that the first coating layer contains a water-insoluble polymer, inorganic particles, and/or a lipid component and the lipid component contains a C15 or higher fatty acid.
摘要:
The present invention provides a method of producing a nucleic acid at high reaction efficiency and high reproducibility with a decreased variation in yield and purity among different reaction lots. A nucleic acid synthesis reaction is carried out on a first solid phase carrier capable of supporting nucleic acid synthesis contained in a solid phase carrier mixture comprising the first solid phase carrier and a second solid phase carrier that does not support nucleic acid synthesis.
摘要:
The present invention relates to a method for producing a porous resin particle having a functional group X, the method including: dissolving a radical polymerizable aromatic monovinyl monomer and a radical polymerizable aromatic divinyl monomer together with a polymerization initiator in an organic solvent to prepare a monomer solution, dispersing the monomer solution in water in the presence of a dispersion stabilizer to obtain a suspension polymerization reaction mixture, and performing a suspension copolymerization while adding, when 0 to 80% of the entire polymerization time of the suspension copolymerization is passed, a mercapto compound represented by the formula (I): HS—R—X (I) in which R represents an alkylene group having a carbon number of 2 to 12, and the functional group X represents a functional group selected from a hydroxy group and a primary amino group, to the suspension polymerization reaction mixture; and the porous resin particle obtained by the method.
摘要:
The plates of transmission chain for an engine are formed with a guide-contacting configuration composed of spaced flat surfaces that come into sliding contact with a flat chain guide, and convex surfaces, continuous with and between the flat surfaces, for sliding contact with a convex chain guide. The convex surfaces are connected by a concave surface that, with the guide surface, forms an oil-retaining clearance. The radius of curvature of the convex curved surfaces of the plate preferably increases gradually from the location where they meet the flat surfaces toward the location where they meet the concave surface. The plates can have the same configuration on the side facing the inside of chain loop as on the side facing the outside of the chain loop.
摘要:
The present invention provides solid support media for use in oligomer synthesis, methods of producing the media, and methods of using the media. In some embodiments, the processes of the invention comprise (a) providing an organic phase comprising an olefin monomer, a cross-linker, a functionalizing reagent and an initiator; and (b) contacting the organic phase with an aqueous phase under conditions of time and temperature effective to form the polymeric bead.
摘要:
The present invention provides solid support media for use in oligomer synthesis, methods of producing the media, and methods of using the media. In some embodiments, the processes of the invention comprise (a) providing an organic phase comprising an olefin monomer, a cross-linker, a functionalizing reagent and an initiator; and (b) contacting the organic phase with an aqueous phase under conditions of time and temperature effective to form the polymeric bead.