Sumitomo Electric Industries, Limited

Yuuichi Mitose

Tetsuya Nakanishi

Atsushi Inoue

Jun Ito

Yasuomi Kaneuchi

Takeyuki Ishii

Hiroshi Kohda

Osamu Shimakawa

Naoki Matsushita

Tetsuya Hayashi

Masayuki Kato

Motoyoshi Kimura

Hajime Arao

Dai Sasaki

Toshiki Taru

Masaki Ohmura

Takuro Watanabe

Tomohiko Kanie

Kazunari Hattori

Kenichiro Takahashi

Kazuhisa Konishi

The embodiment relates to an optical connection component including a bent optical fiber having a bent portion including a region where a curvature of the bent portion is maintained at 0.4 [l/mm] or more while substantially no bending stress remains. The bent optical fiber comprises a core, a first cladding, a second cladding, and a third cladding. Based on the third cladding, a relative refractive index difference &#x394;1 of the core, a relative refractive index difference &#x394;2 of the first cladding, and a relative refractive index difference &#x394;3 of the second cladding satisfy relationships of &#x394;1&#x3e;&#x394;2&#x3e;&#x394;3 and &#x394;3&#x3c;&#x2212;0.5 [%]. The product V3 of the &#x394;3 and a cross-sectional area S of the second cladding is less than &#x2212;200 [%&#xb7;&#x3bc;m]. The curvature in the bent portion is 0.6 [l/mm] or less over an entire length of the bent portion.

Optical connection component

The present embodiment achieves effective height reduction of an entire optical connection component constituted by a bent optical fiber and a fiber fixing component. The fiber fixing component includes a first portion and a second portion which constitute the holding portion in a state of being arranged in a manner interposing an installation plane in order to hold one of non-bent sections positioned at both ends of a bent portion in a state where the one of non-bent sections is arranged on the installation plane. Total lengths of the first portion and the second portion are different from each other, and effective height reduction of the entire optical connection component can be achieved by arranging the bent portion in a stepped portion formed by the total length difference.

The embodiment relates to an optical connection component including a bent optical fiber having a bent portion including a region where a curvature of the bent portion is maintained at 0.4 [1/mm] or more while substantially no bending stress remains. The bent optical fiber comprises a core, a first cladding, a second cladding, and a third cladding. Based on the third cladding, a relative refractive index difference &#x394;of the core, a relative refractive index difference &#x394;of the first cladding, and a relative refractive index difference &#x394;3 of the second cladding satisfy relationships of &#x394;and &#x394;&#x3c;&#x2212;0.5[%]. The product Vof the &#x394;and a cross-sectional area S of the second cladding is less than &#x2212;200 [%&#xb7;&#x3bc;m]. The curvature in the bent portion is 0.6 [1/mm] or less over an entire length of the bent portion.

Optical fiber array

An embodiment of the invention relates to a bent optical fiber manufacturing method for manufacturing a bent optical fiber in which a bent region with a desired radius of curvature is formed, while maintaining an optical transmission loss within a permissible range. The method has a pre-step of preparing an optical fiber comprised of silica-based glass, a bend portion forming step of forming a bend portion in a partial region of the optical fiber, and a laser light irradiating step of irradiating the thus-formed bend portion with laser light.

Method for manufacturing bent optical fiber

A GRIN lens array of an embodiment has a structure for enabling a coupling face in which lens end faces of GRIN lenses are arranged, to be accurately polished so as to have a desired angle relative to optical axes of the GRIN lenses. The GRIN lens array has the GRIN lenses and a main body portion. The main body portion comprises a holding portion having a coupling face, and an edge portion having a reference face to be used as a reference in polishing of the coupling face. The respective thicknesses of the holding portion and the edge portion along the longitudinal direction of the GRIN lenses are set so as to form a step between the coupling face and the reference face.

Grin lens array, lens-mounted connector, and lens-mounted connector system

An optical fiber cable is provided as one capable of preventing damage of an inside tube and an outside tube. An optical fiber cableis provided with an optical fiberfor propagating laser light, an inside tubehousing an end portion of this optical fiber, and an outside tubearranged outside the inside tubeand surrounding the inside tube. A space portionis provided between the optical fiberand an inner peripheral surface of the inside tube

Optical fiber cable

Growing community of inventors

Yokohama, Japan

Yuuichi Mitose