An optical fiber coating die is made such that an interfacial shear rate of the optical fiber to the resin coat is calculated in accordance with a pressure value of resin inside a coating cup, and the interfacial shear rate is in a range of -1.5 X 105 to 0 sec-1. Also, an optical fiber drawing die is made such that ...

An optical fiber manufacturing method includes: a bare optical fiber forming step of forming a bare optical fiber by melting and deforming an optical fiber preform; a cooling step of cooling the bare optical fiber after the bare optical fiber forming step by passing it through a flow channel through which cooling ga...

The present invention is characterized by comprising a drawing step P1 for drawing an optical fiber base material 1P in a drawing furnace 110 and an slow-cooling step P3 for slowly cooling the optical fiber drawn out during the drawing step P1 wherein the optical fiber is passed through a plurality of slow-cooling f...

[Problem] To improve working properties during extraction of optical-fibre core lines and to inhibit an increase in transmission loss even if tensile force is exerted on bundling members in an optical fibre unit in which the bundling members are used to bundle together a bundle of the optical fibre core lines. [Solu...

This reinforcement heating device for an optical fiber connection part is provided with clamp parts (2A 2B) a fifth urging member for applying a pressing force on opposite sides of an optical fiber (11) a first cam mechanism (71) a mechanism whereby displacement of the first cam mechanism (71) controls the grasp...

A hole diameter measuring method for a holey optical fiber of the present invention is a hole diameter measuring method for a holey optical fiber that, when manufacturing a holey optical fiber bare wire by heating and melting a holey optical 5 fiber base material and drawing it, measures a hole diameter of the optic...

A planar light emitting device provided with a light source; a sheet-like light guide that is arranged in the vicinity of the light source to guide light from the light source in a planar direction, and has a plurality of light emitting regions, and a through slit that is formed between the light emitting regions to...

Provided is an optical fiber tape core wire with which it is possible to implement higher density and narrower gauges and to mount an optical fiber in a V shaped groove of a fusion machine without falling away. An optical fiber tape core wire (1) has three or more optical fiber cores (2) which are positioned in para...

This optical fiber cable with attached connector has an optical connector assembled on the leading end part of an optical fiber cable said optical connector having a ferrule in which the optical fiber which protrudes from the terminal of the leading end part is inserted and fixed. An integral reinforcing part is for...

An electric wire which comprises a conductive body (11) comprising a material having a higher volume resistivity than that of copper, wherein the volume resistivity of the conductive body (11) is defined in such a manner that the ratio of the alternating-current resistance of the conductive body to that of a cupper ...

A method of attaching and detaching a preform to and from a support body, the preform being used to manufacture an optical fiber, the method comprising: inserting a connection pin through a penetration hole provided in the preform and a penetration hole provided in the support body; attaching the preform to the su...

A fiber fuse terminator which is used to terminate a fiber fuse, comprising: an optical fiber which includes a core and a cladding having holes extending in a longitudinal direction thereof, in which: a refractive index of the core of the optical fiber is higher than a refractive index of a portion of the cladding e...

A single-mode optical fiber has a cut-off wavelength of 1260 nm or less, a zero-dispersion wavelength in the range of 1300 nm tol324 nm, a zero-dispersion slope of 0.093 ps/nm2/km or less, a mode field diameter at a wavelength of 1310 nm in the range of 5.5 μm to 7.9 μm, and a bending loss of 0.5 dB or less at a ...

This optical fiber cable is provided with a covering resin including an outermost layer. The outermost layer is formed by a resin composition including: (a) a base resin prepared by adding at least one copolymer selected from an ethylene-vinyl acetate copolymer and an ethylene-ethyl acrylate copolymer to a high dens...

This load detection sensor (5) is provided with: a first electrode sheet (50) that has at least one first electrode (52) and a first contact portion (53); a second electrode sheet (60) that has a second electrode (62) facing the first electrode (52) and a second contact portion (63) facing the first contact portion ...

This load detection sensor unit (1A) is provided with: a load detection sensor (5A) that has a pair of electrodes that face each other with a prescribed space therebetween and has a metal plate that covers at least a portion of one electrode; and a pressing member that has a pressing portion (43) that is pressed by ...

In an optical fiber manufacturing method, the cooling device and the coating device are connected in an airtight manner and by preventing a cooling gas, flowing inside the cooling device, from flowing into the coating device by a meniscus of resin inside of the coating device, a flow of the cooling gas inside the co...

An apparatus for manufacturing a glass perform, includes: a dummy tube section, a reservoir portion, and a cooling portion; and a glass tube section in which particles of an alkali metal compound or an alkaline earth metal compound which have flowed into the glass tube section from the dummy tube section are heated ...

An object of the present invention is to provide an optical multiplexer and a fiber laser for obtaining high-output light of a single wavelength. The optical multiplexer according to the present invention is provided with input units 11 and 12, a wavelength multiplexing unit 14, a multiplexed light converting u...

A fiber fuse terminator which is used to terminate a fiber fuse, comprising: an optical fiber which includes a core and a cladding having holes-extending in a longitudinal directionthereof, in which: a refractive index of the core of the optical fiber is higher than a refractive index of a portion of the cladding...

Provided is an optical fiber tape core wire manufacturing method with which it is possible to determine even when separated into each unit optical fiber wire which optical fiber tape core wire the optical fiber core wire is associated with. With a fiber running length adjustment device (13) which adjusts the running...

An optical fiber preform manufacturing apparatus includes a booth, a reaction chamber disposed inside the booth, a target member disposed within the reaction chamber, a burner that deposits glass particles on the target member, a partition plate that partitions the internal space of the booth into a first space wher...

Provided is an optical fiber production method that is characterized by comprising a drawing step P1 wherein an optical fiber preform 1P is drawn in a drawing furnace 110 and an annealing step P3 wherein an optical fiber that is drawn out during the drawing step P1 is annealed in an annealing furnace 121. The optica...

An optical fiber cable is comprised of : a slotted core (17) elongated along an axis of the optical fiber cable, the slotted core including a slot (15) running in parallel with the axis and a groove (11) accessible through the slot; one or more optical fibers (3) placed in the groove; a sheath (9) enclosing th...

An ytterbium-doped optical fiber of the present invention includes: a core which contains ytterbium, aluminum, and phosphorus and does not contain germanium; and a cladding which surrounds this core. The ytterbium concentration in the core in terms of ytterbium oxide is 0.09 to 0.68 mole percent. The molar ratio bet...

An optical connector that is assembled at the terminal of an optical fiber cable that integrates an optical fiber and a tension-resisting member extending in the longitudinal direction of the optical fiber, having at the rear end of a connector body a stationary portion in which a thread portion is formed on the out...

The present invention provides an optical fiber coating removing device which includes a base and a pair of arm members extending in one direction from the base. Each arm member includes an elastically deformable deforming portion at the base side and an operation portion at the outer end part side of said deforming...

An optical fiber cable is comprised of: a slotted core (7) elongated along an axis of the optical fiber cable, the slotted core including a slot (11) running in parallel with the axis and a groove (5) accessible through the slot; one or more optical fibers (3) placed in the groove; a sheath (9) enclosing the sl...

Provided is an optical fiber ribbon core whereby a ribboning material can be easily removed after single core separation. The present invention is provided with: a plurality of optical fiber cores (10a 10b) arranged parallel to each other and apart from each other; and a ribboning material (20) having coating parts ...

A method for producing an optical fiber preform includes a dehydration step and a sintering step. In the dehydration step, a porous glass base material is provided to a furnace core tube of a dehydration-sintering furnace, and the porous glass base material is dehydrated using a dehydration agent added with an argon...

An optical fiber fusion splicer comprises: a windshield cover which has a rotational shaft and opens and closes by rotating around said rotational shaft; a rope member winding section which is fixed to the windshield cover or formed as a part of the windshield cover on the same axial line as said rotational shaft of...

The disclosed reactor core tube inspection method is used for dehydrating/sintering the parent metal for a silica glass optical fibre and forms a sintering furnace that provides a furnace body that covers a heater provided to the outer circumference of the reactor core tube. The disclosed inspection method detects b...

A method for manufacturing an optical fiber preform of the invention is a method for manufacturing an optical fiber preform, which forms a deposition portion composed of glass fine particles on a glass rod so as to form a glass fine particle deposition, and suspends the glass fine particle deposition vertically into...

An electronic device includes at least first and second enclosures mounted so as to enable relative displacement therebetween, and an electric wire which electrically connects a circuit of the first enclosure and a circuit of the second enclosure. The electric wire includes a tape-shaped flat cable, including a p...

A single-mode optical fiber has a cut-off wavelength of 1260 nm or less, a zero-dispersion wavelength in the range of 1300 nm to 1324 nm, a zero-dispersion slope of 0.093 ps/nm2/km or less, a mode field diameter at a wavelength of 1310 nm in the range of 5.5 µm to 7.9µm, and a bending loss of 0.5 dB or less at a wav...

A method of measuring polarization mode dispersion of an optical fiber, includes estimating polarization mode dispersion when an optical fiber is formed as an optical cable, from a beat length when the optical fiber is wound around a bobbin, and an average coupling length when the optical fiber is formed as the opti...

A method of producing an optical fiber preform comprising: performing production of a glass preform having a valid portion to be drawn to an optical fiber and invalid portions disposed to both ends of the valid portion by depositing a porous silica glass body on a periphery of a glass rod; and performing vitrificati...

An optical fiber twisting device capable of stably covering a bare optical fiber by preventing the optical fiber from being swung during drawing. The optical fiber twisting device comprises a twisting roller (22) twisting the molten portion of an optical fiber base metal positioned on the upstream side of the optica...

A method for processing an optical fiber at least comprises a first step for forming a reduced pressure atmosphere within a space where the optical fiber is housed and a second step for exposing the optical fiber to a deuterium-containing gas by supplying the deuterium-containing gas into the space. ...

A rare-earth doped core multi-clad fiber that includes: a core that includes a rare-earth element; and a plurality of cladding layers that surround the core, in which: an outermost cladding of the plurality of cladding layers is made of polymer cladding; the plurality of cladding layers have a polygonal inner claddi...

A treatment method for an optical fiber including accommodating an optical fiber inside a treatment chamber, introducing a deuterium containing gas into the  treatment chamber and in a deuterium treatment Step exposing the Optical fiber to atmosphere at the dcuterium coataining gas. In the deuterium treatment ste...

An optical fiber manufacturing device includes a bare optical fiber-forming unit that forms a bare optical fiber by pulling an optical fiber preform; a coating unit that forms an optical fiber by coating the bare optical fiber outputted from the bare optical fiber-forming unit with a coating layer; a first direction...

An optical fiber is constituted by: a three-layer structured core which includes, a first core (having a relative refractive index difference of Δ1 in a region of a radius of Rl), a second core (having a relative refractive index difference of Δ2 in a region from the radius Rl to a radius of R2), and a third core...

A rare earth-doped core optical fiber of the present invention includes a core comprising a silica glass containing at least aluminum and ytterbium, and a clad provided around the core and comprising a silica glass having a lower refraction index than that of the core, wherein the core has an aluminum concentrati...

A manufacturing method of an optical fiber preform includes: a glass particle generating step of generating glass particles by ejecting an oxyhydrogen flame including a glass source gas from a burner; and a deposition step of depositing the generated glass particles on an outer periphery surface of a target. In at l...

A fiber laser is provided with a signal light source for outputting signal light, and a rare earth element doped fiber which amplifies the signal light outputted from the signal light source and outputs it The fiber laser is further provided with a Raman amplification fiber, which is arranged as a part of a light tr...

A method of drawing a bare optical fiber, comprising the step of melting an optical fiber parent material by heating means and drawing a bare optical fiber and the step of after the heat melting step, subjecting the bare optical fiber to natural cooling or forced cooling with cooling means, wherein in the heat melti...

A multi-core fiber for an optical pumping device obtained by inserting a plurality of optical fibers into an alignment member and integrating by heating, in which the alignment member is constituted with a material that has a lower softening temperature than the softening temperature of the optical fibers that ar...

An optical fiber comprises a center core and a cladding located at an outer periphery of the core, wherein the core comprises at least one codoped layer made from silica glass doped with germanium and fluorine, and at least one lower-concentration codoped layer made from silica glass doped with germanium, or silica ...

Provided is a fiber laser of the MO-PA method including a pulse oscillator and a first optical fiber amplifier using a rare earth-added optical fiber connected to a latter stage of the pulse oscillator. The fiber laser further includes: a wavelength conversion unit arranged between the pulse oscillator and the opt...

An optical fiber tape core wire can be branched using some tool. The optical fiber tape core wire comprises a plurality of optical fibers running in parallel, a collective coating which covers the plurality of optical fibers entirely, a recess formed in at least any one gap between the optical fibers and on the co...

In a method of measurement of the birefringence of an optical fiber, the round-trip Jones matrix R(z) for a first interval (0, z) from a measurement starting point 0 in the optical fiber for measurement to a prescribed position z, and the round-trip Jones matrix R(z+Δz) for a second interval (0, z+Δz) from the me...

There are provided an amplification optical fiber, and an optical fiber amplifier and a resonator using the same capable of outputting light of high beam quality even when a higher-order mode that is axially symmetric is excited in addition to LP01 mode. An amplification optical fiber 50 includes: a core 51; a...

A method for manufacturing an optical fiber in which a flow of a cooling gas within a cooling device is made to be an upward flow and the cooling gas is discharged to outside from an upper end of the cooling device by connecting the cooling device and a coating device in an airtight manner, and closing a flow of the...

An optical connector of the present invention includes a ferrule to which an internal optical fiber is embedded and an end face grinding is performed; and a connection mechanism which extends to an opposite side of a connection end face of the ferrule, wherein the optical connector butt connects the internal optical...

An optical fiber includes a bare optical fiber portion, to which elastic torsion is applied, and a coating layer, which coats the bare optical fiber portion, is formed of curable resin, and causes elastic repulsion against resilience occurring in the bare optical fiber portion so that the elastic torsion applied to ...

323Disclosed is a method of manufacture for a porous quartz material comprising a step where a plurality of burners are disposed near an optical fibre core rod; and a deposition step where the burners deposit a plurality of soot layers on the outer surface of the optical fibre core rods. In the deposition step each ...

In the disclosed method for manufacturing fiber optic strands an optical fiber base material is melted and spun to form a bare optical fiber; a cladding layer comprising a resin is provided around the bare optical fiber forming a fiber optic strand intermediate; the cladding layer of said fiber optic strand intermed...

A waterproof connector for a flexible substrate includes: a flexible substrate which includes an insulating film with a conductive pattern formed thereon; a connection terminal joined to the conductive pattern at a terminal section of the flexible substrate; a housing which accommodates the connection terminal; a re...

Provided is a printing device capable of marking an optical fiber at high speed and with good visibility. The device is provided wit: an ink tank (1) for storing an ink; a rake up roll (2) for raking up ink (I) from inside the ink tank (1); a printing roll (3) on which print patterns (31  36) into which ink (I) that...

A method of producing an optical fiber preform by heating a glass preform that has a glass rod and a silica glass porous body and includes a valid portion and invalid portions, comprising: heating the glass preform while moving the glass preform along its axial direction relative to a heater; stopping the relative m...

An ytterbium-doped optical fiber including a core containing at least ytterbium, aluminum and phosphorous and a clad surrounding the core, wherein a molar concentration of diphosphorus pentoxide with respect to phosphorus in the core is equal to a molar concentration of aluminum oxide with respect to aluminum in the...

An optical fiber manufacturing apparatus including: a heating furnace in which an optical fiber is formed by melt-drawing an optical fiber preform; a sealing mechanism which is provided on an opening portion located at an upstream of the heating furnace and seals the heating furnace with an inert gas; a first pipe w...

An optical fiber cable includes an elongated optical element portion having an optical fiber, a pair of tensile strength members and an outer jacket. The optical fiber is composed of one or more plastic coated optical fibers, tight-buffered optical fibers or optical ribbon fibers. The pair of tensile strength member...

The optical fiber fusion splicer of the present invention for heating and fusion splicing optical fibers to each other is provided with: a sheath clamp mounting stage; a sheath clamp having a sheath clamp lid for opening and closing the sheath clamp being attached to the sheath clamp mounting stage; and a first moti...

The purpose of the present invention is to suppress scraping of a coating resin when an optical fiber is sent out of a coating die. Multiple optical fibers (3) wherein the Young s modulus of an ultraviolet curable resin (13) at an outer layer of each optical fiber (3) is greater than or equal to 300 MPa and wherein ...

This optical fiber cable comprises: a plurality of optical fiber units each having a plurality of optical fibers; a holding roll for wrapping the optical fiber units; at least one inclusion arranged inside the holding roll; and a sheath for coating the holding roll. A plurality of outer units located in an outermost...

A fusion splicer of the invention includes a device main body having a heater which heats a pair of optical fibers, a pair of glass holders on which grooves that places respective glass parts of the pair of optical fibers thereon are formed, a pair of openable and closable first clamps which hold the glass parts bet...

An optical fiber cutting system of the present disclosure comprises: a pair of clamps that are disposed spaced apart from each other in the lengthwise direction of an optical fiber and that grip the optical fiber; a disc shaped blade member that is moved between the pair of clamps so that an outer peripheral edge of...

Provided is a method of manufacturing an optical fiber tape, an optical fiber tape manufacturing device that implements said manufacturing method, and the optical fiber tape manufactured by said manufacturing method said multicore optical fiber tape method aligning a plurality of optical fiber core cables in...

ABSTRACT OPTICAL FIBER FUSION-SPLICER AND ELECTRODE ROD UNIT An optical fiber fusion-splicer of the invention fusion-splices at least a pair of optical fibers.  The optical fiber fusion-splicer includes a pair of electrode rod units of which pointed end portions are disposed to face each other with abutting portion...

An optical fiber measurement device according to the present invention comprises: a light source that emits light toward an optical fiber; a light-receiving part that receives light propagated through the optical fiber; a direction-changing member that changes, to downward, the direction in which the optical fiber, ...

[Problem] To suppress micro-bending losses of optical fibers when an intermittent-connection-type optical fiber tape is configured by separating the outer circumferential parts of the adjacent optical fibers from each other. [Solution] An intermittent-connection-type optical fiber tape according to the present inven...

TITLE: DISPERSION SHIFTED OPTICAL FIBER.A dispersion shift optical fiber which comprises a core provided with a center core portion and a peripheral core portion formed around the center core portion and a clad formed around the core and have a refractive index distribution shape in which the refractiv...

A dispersion-shifted optical fiber is obtained thathas a refractive index distribution shape comprising acenter core portion of high refractive index, a step coreportion of lower refractive index than the center coreportion, provided about the outer circumference thereof,and cla...

An optical fiber and an optical fiber preform having optical characteristics, such as the wavelength dispersion, close to design values by controlling the amount of change in the refractive index in the core, thereby realizing high-quality and high-speedtransmission, and manufacturing methods the...

An optical fiber is formed by performing vapor phase deposition ofSiO2 on the outside of a glass rod comprising a core section (1) and a firstcladding section (2) and drawing a glass preform which formed by a secondcladding section (3). Also, a single mode optical fiber is manufactured so t...

N/A

An optical fiber has a core provided in the center ; a first cladding layer (2) on the periphery of the core (1), a second cladding layer (3) on the periphery of the first cladding layer (2), and a third cladding layer (4) on the periphery of the second cladding layer (3). The maximum refractive index of the...

An optical fiber comprising a high concentration germanium layer (1) which is disposed at a central position of the optical fiber and contains germanium oxide in a concentration of at least 0 1% by weight, relative to the total weight of the high concentration germanium layer, and a low concentration germani...

A treatment method for an optical fiber (2) including accommodating anoptical fiber inside a treatment chamber (1a); introducing a deuterium containing gasinto the treatment chamber (1a); and in a deuterium treatment step, exposing theoptical fiber (2) to atmosphere of the deuterium contain...

An optical fiber cutting system of the invention includes a pair of clamps disposed at an interval in a longitudinal direction of an optical fiber and configured to grasp the optical fiber, a disk-shaped blade member configured to move so as to pass between the pair of clamps, cause an outer circumferential edge to ...

A coating removal blade used in an optical fiber coating removal apparatus configured to remove a coating material of an optical fiber includes a blade tip that is pressed against the coating material from a radial direction of an optical fiber bare wire of the optical fiber, and a pressing surface against which the...

00122334401234The present invention pertains to a dispersion shifted optical fiber for propagating C band and L band light. A first core segment 10 has a radius r of 0.3 to 2.8 µm inclusive and a specific refractive index differential ? of 0.4 to 0.9% inclusive. The radius r of a first segment 11 is 1.8 to 5.0 µm in...

ABSTRACT OPTICAL FIBER CUTTER An optical fiber cutter of the invention includes: a device main body that includes a lid rotatably mounted with respect to a base and is capable of gripping an optical fiber by a lower gripper provided on the base and an upper gripper provided on the lid; a movable blade member config...

ABSTRACT OPTICAL FIBER CUTTER An optical fiber cutter of the invention includes a base that includes a pair of clamps disposed with an interval therebetween in a longitudinal direction of an optical fiber, a blade member moving base that includes a disk-shaped blade member and is configured to move the blade member...

[Problem] To prevent a main body and a grip that are mutually separated when removing a coating from getting closer to each other. [Solution] A coating removal device according to the present disclosure includes: a main body having a blade for removing a coating; a grip for gripping an optical fiber; and a slide tha...

[Problem] To suggest exchanging a blade when the blade gets dull. [Solution] A coating removal device according to the present disclosure comprises: a heater including a heating unit for heating an optical fiber coating and a blade for cutting the optical fiber coating; a grip capable of moving relative to the heate...

The present invention is characterized by comprising a drawing step P1 wherein an optical fiber preform 1P is drawn in a drawing furnace 110 and an annealing step P3 wherein an optical fiber that is drawn out during the drawing step P1 is annealed. The present invention is also characterized in that during the annea...

[Problem] When bundle materials having a width greater than the thickness in cross-section are wound around an optical fiber bundle in an SZ shape twisting occurs in the bundle materials at locations at which the winding direction is inverted and the bundle materials become joined in a shape of being upright from th...

To efficiently perform positional alignment of a reinforcing sleeve. [Solution] In this optical fiber reinforcement method, the following steps are performed. A clad first optical fiber and second optical fiber are fusion-spliced. After fusion splicing, the previously clad first optical fiber and second optical fibe...

A method for manufacturing an optical fiber, the method involving: a drawing process P1 in which an optical fiber preform 1P is drawn in a drawing furnace 110; and a slow cooling process P3 in which an optical fiber 1 drawn in the drawing process P1 is slowly cooled. In the slow cooling process P3, the optical fiber...

ABSTRACT OPTICAL FIBER RIBBON, OPTICAL FIBER CABLE, AND METHOD OF MANUFACTURING OPTICAL FIBER RIBBON An optical fiber ribbon is obtained by connecting a plurality of optical fiber colored core wires to each other with a connector formed of a UV curable resin.  Each of the optical fiber colored core wires includes...

[Problem] To provide a novel optical cable from which an optical fiber can be easily withdrawn. [Solution] This optical cable is provided with: an optical fiber unit in which a plurality of optical fibers are surrounded by a press-winding tape; at least three tension members disposed, at intervals in the circumferen...

The present invention provides a method for manufacturing an intermittently-fixed optical fiber ribbon, the method including a step of collectively coating a plurality of optical fibers with a coating material by applying an uncured coating material to intrude between the plurality of optical fibers and curing the i...

An optical fiber colored core provided with an optical fiber bare wire a primary layer formed by a UV-curable resin covering the optical fiber bare wire a secondary layer formed by a UV-curable resin covering the primary layer and a colored layer disposed on the outside of the secondary layer and formed by a colored...

An optical fiber cable 100 is provided with a core 3 formed by a plurality of optical fibers 1 and an inside inclusion 40A enveloped by a press winding 2 an outside inclusion 40B disposed on the outside of the core 3 and a sheath 60A for covering the core 3 and the outside inclusion 40B.

This optical fiber cable is provided with a first collection layer that is formed by twisting together a plurality of first optical fiber units spirally in a first direction without them twisting back. Each of the first optical fiber units has a plurality of optical fibers twisted together in a second direction. The...

Provided is an optical fiber comprising a core, a depressed layer surrounding the core, and a clad layer surrounding the depressed layer. The refractive index distribution of the core exhibits an a-power distribution having an index a of 1.0-2.9, the relative refractive index ?- of the depressed layer to the clad la...

Provided are a method and an apparatus both for manufacturing an optical fiber cable that rarely undergoes the cracking of a coating after the production of the optical fiber cable. The apparatus is provided with: a primary irradiation unit (106) for irradiating each point on an optical fiber cable, in which an ultr...

[Problem] An optical fiber needs to be protected when laying the same. When using a protective tube or a spiral tube, it takes time to insert an optical fiber. A braided tube (a tube made up of woven wire) requires time to insert an optical fiber due to a small amount of extension and contraction in the longitudinal...

Provided is a method for manufacturing an optical fiber, the method comprising: a step for gripping a base material with a grip portion having an alignment mechanism; a step for forming a bare fiber by melting the base metal in a melting furnace; a step for cooling the bare fiber by blowing gas in a cooling unit; a ...

An optical fiber production method includes a drawing process of drawing an optical fiber preform in a drawing furnace; and a slow cooling process of slowly cooling an optical fiber drawn in the drawing process, wherein in the slow cooling process, the optical fiber is passed through a plurality of annealing furnace...

This optical fiber winding bobbin (10) comprises: a body section (11) around which an optical fiber (1) is wound; a first flange part (12) extending from the body section (11) in a radial direction; and a seal member (20) affixed to a second primary surface (12b) of the first flange part (12). A slit (16) penetratin...

The purpose of the present invention is to provide: an optical fiber cable which can improve the ease of work of exposing a core; and a method for exposing said core. In the method for exposing a core of an optical fiber cable (1A) according to the present invention, an incision (L) is made in an outer covering (101...

An optical fiber cutter of the invention includes a fiber holder which holds a plurality of optical fibers each including a glass portion and a coated portion that covers the glass portion, an alignment member which has an insertion hole, and a blade member which moves with respect to the base in a first perpendicul...

This management device manages a unit with a long object wound on a drum. This management device determines the remaining amount of the long object on the basis of the results of checking data for collation in which the imaging results when images of the unit are continuously captured during the winding of the long ...

This optical fiber cable comprises a sheath, and a core having a plurality of optical fibers housed in an intertwisted state in a housing space inside the sheath. Each of the plurality of optical fibers has a glass part, a primary layer covering the glass part, and a secondary layer covering the primary layer, the v...

This inspection method for an optical fiber (1) including an optical fiber bare wire (1N) and a light-transmitting coating layer (12) covering an outer peripheral surface of the optical fiber bare wire (1N) comprises: an irradiation step (S1) for irradiating, with illumination light (L) having directivity, an outer ...

A method of exposing a core of an optical fiber cable includes, making a cut along a circumferential direction in the jacket at a position closer to the first end portion of the optical fiber cable than to the second end portion of the optical fiber cable in a longitudinal direction, bending the optical fiber cabl...

[Problem] The work of causing a plurality of optical fibers separated into single cores to be held in a holder involves inconvenient fiber handling and poor workability. [Solution] This optical fiber arrangement method arranges a plurality of optical fibers extending from a holder, at a second pitch that is narrower...

This device (20) for drawing an optical fiber (1) from a bobbin (10) comprises: a first drawing unit (50) that holds one end section (E1) of the optical fiber (1), draws a predetermined portion of the optical fiber (1) wound around the bobbin (10) from the one end section (E1) while the bobbin (10) rotates in a pred...

A fusion splicer according to the invention includes a retreat mechanism. The retreat mechanism includes: a power source; a rotating member which is rotatable around a rotation center; an elastic member that elastically deforms by power received from the power source and thereby stores elastic energy; a transmission...

A method for producing a porous preform comprising measuring the surfacetemperature distribution at the end of the core soot preform, and (1) maintaining thesurface temperature Tc at the center point on the end of the core soot preform in the rangeof 500 to 1000°C, and preferably in the ran...

The invention discloses a method for connecting optical fibers through a connecting structurehaving first and second clamping sections (18,19) using an optical fiber connecting tool (1)having first and second opening/closing members (2,3), the method comprising: opening the firstand second ...

To achieve a joint at a reversal point in the winding direction of a bundling cord even with an increased linear velocity. [Solution] The present invention provides a method for manufacturing an optical fiber unit by winding the outer periphery of an optical fiber bundle into which a plurality of optical fibers is...

The present disclosure relates to a method for manufacturing an optical fiber ribbon 1 wherein adjacent optical fibers 3 are connected at intervals along the longitudinal direction, the method comprising a step of feeding a plurality of the optical fibers 3 along the longitudinal direction, and a step of rotating a ...

An optical fiber cable including a core including gathered optical fibers, an inner sheath that accommodates the core therein, a wire body embedded in the inner sheath, a pair of tension members embedded in the inner sheath with the core interposed therebetween, a reinforcing sheet that covers the inner sheath and t...

The present invention provides an optical fiber unit including a plurality of optical fibers, and at least two binding materials that bind the plurality of optical fibers, the two binding materials are wound around the plurality of optical fibers in an SZ shape, and are adhered to each other at respective reversed p...

An inspection device of an optical fiber  unit  inspects an optical fiber unit in which a plurality  of binding  materials  are wound  in an SZ shape on a plurality  of optical fibers.    The inspection  device  of an optical  fiber  unit  includes  a measurement  unit  that is configured  to measure  a width  of th...

The present invention provides an optical fiber unit including a plurality of optical fibers, and at least two binding materials that bind the plurality of optical fibers, the two binding materials are wound around the plurality of optical fibers in an SZ shape, and are adhered to each other at respective reversed p...

This method for producing porous glass microparticles has a first layer formation step for forming a first soot layer on the surface of a starting base material, and an outer layer formation step for forming a plurality of soot layers on the outside of the first soot layer. In the first layer formation step, the fir...

This optical fiber cable comprises: a sheath; and a core that is accommodated in the sheath and that has an intermittent adhesive-type tape core wire which includes a plurality of optical fibers and a plurality of adhesive parts for intermittently adhering the plurality of optical fibers in the length direction. Rec...

An optical fiber (10) comprises a glass portion (13), a primary coating layer (14), and a secondary coating layer (15). In the optical fiber (10), the value of a microbend loss characteristic factor FµBL_G?ß represented by FµBL_G?ß = FµBL_G × FµBL_?ß by using a geometry microbend loss characteristic FµBL_G and an op...

An optical fiber (10) according to the present invention is provided with a glass part (13), a primary cover layer (14) and a secondary cover layer (15). With respect to this optical fiber (10), the value of a microbending loss characterization factor FµBL_GO represented by FµBL_GO = FµBL_G × FµBL_O, using geometric...

[Solution] An optical fiber unit according to the present disclosure is provided with a plurality of intermittent connection-type optical fiber tapes. At least one of the optical fiber tapes has a plurality of optical fibers including a first optical fiber and a second optical fiber longer than the first optical fib...

An alignment device (4) for a multicore optical fiber (1) comprises: a fiber rotation unit (41) that changes the rotation angle about the axis of the multicore optical fiber (1); a fiber bending unit (42) that bends, in a predetermined direction, the multicore optical fiber (1) the rotation angle of which has been c...

A cable bundle 1 comprises a plurality of bundle units 10A-10C stacked in a second direction D3 orthogonal to a first direction that is the circumferential direction D1 of the cable bundle 1. The bundle units 10A-10C are respectively provided with first loops 20A-20C and second loops 30A-30C stacked in the second di...