Sumitomo Electric Industries, Limited

Okayama University

Hiroshi Kohda

Kazuhito Saito

Atsushi Inoue

Tetsuya Nakanishi

Jun Ito

Yuuichi Mitose

Eiichiro Yamada

Takeyuki Ishii

Motoki Kakui

Takashi Fujii

Akira Inoue

Shinobu Tamaoki

Yasuomi Kaneuchi

Koji Nakazato

Shigehiro Nagano

Kumiko Tachibana

Takeo Komiya

Suguru Takasaki

Hiroshi Suganuma

Takemi Hasegawa

Mitsuaki Tamura

Dai Sasaki

Chie Fukuda

Hitoshi Hatayama

Katsuyuki Tsuneishi

Tomomi Moriya

Kazuhiro Okamoto

Maki Ikeji

Yasuhiro Okamoto

Yoshiyuki Uno

Miyoko Fujimoto

Kenta Takahashi

Takaharu Sato

A method of manufacturing an optical fiber with a hole from a preform having a through hole is disclosed. The manufacturing method includes placing a preform in a drawing furnace, forming an optical fiber by melting and drawing the preform in the drawing furnace while a gas is introduced into the through hole, capturing an image of the optical fiber drawn from the preform, and measuring a hole diameter of the optical fiber based on an image captured in the capturing of the image and controlling a pressure of the gas introduced into the through hole based on a measurement result. In the capturing of the image, when the optical fiber deviates, a predetermined countermeasure is taken to make the image clear, and the image is maintained in a clear state.

Method of manufacturing optical fiber and apparatus for manufacturing optical fiber

A method for manufacturing an optical fiber, the method including: a stripping step of partially stripping a coating layerof the optical fiber; a splicing step of fusion-splicing an exposed end surface of a glass fiber; and a recoating step of recoating a protective resincovering a stripped portion of the coating layerand an exposed portion of the glass fiber, in which the stripping step irradiates the coating layerwith a laser light to strip the coating layer. A pulse width of the laser light is 50 fs or more and 500 ps or less.

Method for producing optical fiber with laser stripping step, and optical fiber thereof

A method for manufacturing an optical fiber, the method including: a stripping step of partially stripping a coating layer of the optical fiber; a splicing step of fusion-splicing an exposed end surface of a glass fiber; and a recoating step of recoating a protective resin covering a stripped portion of the coating layer and an exposed portion of the glass fiber, in which the stripping step is a step of irradiating the coating layer with a laser light to strip the coating layer.

Method for manufacturing optical fiber and optical fiber

Provided is a glass eccentricity measurement device which includes an irradiation unit that irradiates a side surface of a coated glass fiber obtained by coating the striated glass with light, and a light receiving unit that receives light scattered and/or refracted following irradiation of the side surface of the coated glass fiber therewith, and measures an eccentricity of the glass in the coated glass fiber by a pattern of brightness and darkness in the light received by the light receiving unit, in which three or more sets including the irradiation unit and a screen are provided around the coated glass fiber, and the sets are arranged respectively in directions having different angles on a circumference centered on the coated glass fiber.

Optical fiber glass eccentricity measurement device and measurement method

An optical fiber inspecting device is disclosed. The optical fiber inspecting device includes a first light-emitting unit that irradiates an optical fiber with a first light beam, the optical fiber including a glass fiber and a coating resin and moving in an axial direction, and a first light-receiving unit that receives scattered light resulting from the first light beam scattered in the optical fiber, and converts the scattered light to an electrical signal. An optical axis of the first light-receiving unit passes through an irradiation position where the first light beam strikes the optical fiber, and the first light beam and the optical axis of the first light-receiving unit diagonally intersect each other, thereby preventing the first light beam from directly entering the first light-receiving unit.

Optical fiber inspecting device, optical fiber manufacturing apparatus, method for inspecting optical fiber, and method for manufacturing optical fiber

Optical fiber array

The sealing componentof the invention is provided with a metallic housingthat comprises a base part, a side wallconnected to the base partand an opening portionfacing to the base part, and a metallic lidto cover the opening portion, wherein a melted portionis formed around the boundary between the lidand the upper edge, the melted portionis formed to reach the cornerof the side wall, and the melted portionhas a convexly-curved outward formfrom the top face of the lidto the cornerin the longitudinal cross-sectional view of the sealing component

Sealing component, optical device sealing structure, method for producing sealing component, and method for producing optical device sealing structure

The present invention relates to a laser light source capable of suppressing variation in propagation state of randomly-polarized laser light. In the laser light source, an isolator including a Faraday rotation crystal having a positive thermooptic constant, and a nonlinear optical crystal having a negative thermooptic constant are arranged in order along a traveling direction of laser light. The nonlinear optical crystal is arranged in a state off normal incidence of incident light so that a propagation axis of light propagating in the crystal is parallel to an optic axis of the crystal.

Laser light source

There is obtained a laser processing method by which an excellent shape of a cut surface can be achieved and an increase in cost can be suppressed. A laser processing method includes the steps of: preparing a material to be processed; and forming a modified area in the material to be processed, by irradiating the material to be processed with laser beam. In the aforementioned step, pulsed laser beam having a continuous spectrum is focused with a lens, thereby forming a focusing line constituted by a plurality of focuses that are obtained by predetermined bands forming the continuous spectrum of the laser beam, and the material to be processed is irradiated with the laser beam such that at least a part of the focusing line is located on a surface of the material to be processed, thereby forming the modified area on an axis of the focusing line.

Laser processing method

A laser processing apparatusincludes a processing light sourceemitting processing light; an observation light emitting unitemitting observation light; optical fibersconducting light having a plurality of wavelengths generated at an electronic component; a detecting unitdetecting the light conducted by the optical fibers; and a control unitcontrolling a light emitting state of the processing light emitting unit. The optical fibersare categorized into four groups, and disposed so as to surround an optical fiberconducting the processing light. The optical fiberscategorized into the four groups are capable of conducting the observation light to the electronic componentevery group.

Laser processing apparatus and processing method employed therein

A metal heating apparatus according to an embodiment of the present invention comprises a light output portion for outputting light having a center wavelength in a wavelength range of 200 nm to 600 nm.

Metal heating apparatus, metal heating method, and light source apparatus

An optical spliceraccording to an embodiment of the present invention has a plurality of optical fibers, and an optical splice memberhaving a plurality of fiber holesin each of which a portion including one endof each fiberis inserted, and a mode field diameter Win one endof optical fiberis enlarged relative to a mode field diameter Win the other portion of optical fiber

Optical splicer, optical module, and method of producing optical splicer

Growing community of inventors

Yokohama, Japan

Hiroshi Kohda