Sumitomo Electric Industries, Limited

Suguru Takasaki

Hiroshi Kohda

Yoshinori Yamamoto

Masato Suzuki

Saori Kubara

Takemi Hasegawa

Yoshiaki Tamura

Shuhei Toyokawa

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

A method for manufacturing an optical fiber includes: exposing a glass fiber by stripping a fiber coating layer at an end portion, on a splicing side, of each of a pair of optical fibers; fusion-splicing the glass fibers; and recoating a protective resin on a periphery of exposed portions of the glass fibers. The fiber coating layer includes a primary resin layer on an inner peripheral side and having a Young's modulus of 0.5 MPa or less and a secondary resin layer on an outer peripheral side and having a Young's modulus of 800 MPa or greater, the exposing includes forming a shape of a coating edge of the fiber coating layer which includes the primary resin layer and the secondary resin layer into a tapered shape which becomes narrower toward the end portion side, and the recoating includes coating the protective resin to include the coating edge.

Optical fiber manufacturing method and optical fiber

The present embodiment relates to an optical fiber line or the like configured by connecting a single-mode optical fiber with a cladding containing fluorine and a large Aoptical fiber by TEC connection, and a connection state between such two types of optical fibers is set such that a connection loss expressed in dB of a fundamental mode is equal to or less than 55% of an ideal butt loss expressed in dB at a wavelength of 1550 nm.

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Osaka, Japan

Suguru Takasaki