Sumitomo Electric Industries, Limited

Nippon Telegraph and Telephone Corporation

Sei Optifrontier Co., Ltd.

Sumitomo Electric Optifrontier Co., Ltd.

Japan Communication Accessories Manufacturing Co., Ltd.

Other

Sumitomo Electric Lightwave Corp.

Sumitomo Electic Lightwave Corp.

Tomohiko Ueda

Toshiaki Kakii

Kenichiro Ohtsuka

Hiroshi Katsura

Yoshikyo Tamekuni

Toshifumi Hosoya

Kazuya Masuda

Shinji Nagasawa

Toru Yamanishi

Daizo Nishioka

Takayuki Yokochi

Takayasu Yamauchi

Makoto Honjo

Ichiro Matsuura

Tsuneari Ito

Eisuke Sasaoka

Takemi Hasegawa

Wataru Sakurai

Takashi Kondo

Kazuo Hogari

Tetsufumi Tsuzaki

Kenichiro Otsuka

Shin-ichi Furukawa

Kei Sunaga

Yoshifumi Hishikawa

Masanori Yamanaka

Yuko Masunaga

Kazuhiro Sato

Hidetoshi Ishida

Ichiro Tsuchiya

Yuji Suzuki

Yukihiro Yokomachi

Tomoyuki Yokokawa

Hitoshi Hatayama

Yoshiyuki Suetsugu

Junji Fukui

Toshiyuki Miyamoto

Takahiro Inaba

Shigeru Tomita

Hiroyasu Sugiyama

Takashi Murakami

Kousuke Tanaka

Tadashi Haibara

Takahisa Yamaguchi

Tsuyoshi Ikada

Gouichi Fukumoto

Kyoji Maruyama

Tetsuo Shiota

A measurement system includes a measurement device including a light source, and a first power meter, and one or a plurality of connection members each configured to optically connect a pair of optical fiber lines of the plurality of optical fiber lines. A first optical fiber line of the pair of optical fiber lines includes a first end and a second end, a second optical fiber line of the pair of optical fiber lines includes a third end and a fourth end, the one or plurality of connection members optically connect the second end to the fourth end, the light source causes testing light to be incident on the first end, and the first power meter measures first intensity of first output light output from the third end by causing the testing light to propagate through the pair of optical fiber lines.

Measurement system

In a fiber connection structure with optical connectors according to one embodiment, among m first connector port groups, arrangement orders of colors of a plurality of the optical fibers in (2×j−1)th (j is a natural number satisfying 1≤j and 2×j≤m) first connector port groups are the same, and among the m first connector port groups, arrangement orders of the colors of the plurality of optical fibers in (2×j)th first connector port groups are the same. The arrangement order of the colors of the plurality of optical fibers in the (2×j)th first connector port group is a reverse order of the arrangement order of the colors of the plurality of optical fibers in the (2×j−1)th first connector port group.

Fiber connection structure with optical connector, and module

An optical connector includes a holder configured to hold at least three or more optical connector plugs. The optical connector plugs and the adapters are arranged in an intersecting direction intersecting with a connecting direction. The optical connector plugs include a first optical connector plug and a second optical connector plug. Any of the first optical connector plug and the adapter to which the first optical connector plug is connected has a latch mechanism configured to engage the first optical connector plug with the adapter. Any of the second optical connector plug and the adapter to which the second optical connector plug is connected does not have a latch mechanism configured to engage the second optical connector plug with the adapter.

Optical connector

An optical fiber rack includes: a rack part on which a plurality of termination units arranged along an up-down direction are located; an optical fiber housing part which has a back plate and in which an extra length wiring part in a plurality of optical fiber bundles connected to each of the plurality of termination units is housed; and a plurality of first dividing bodies for dividing locations of the optical fiber bundles in the optical fiber housing part, the plurality of first dividing bodies being attached to the back plate so as to be arranged along the up-down direction in the optical fiber housing part. The first dividing body has a holding part for holding the corresponding optical fiber bundle, and the holding part of the first dividing body provided lower in the up-down direction is positioned to be separated from the back plate.

Fiber optic cable rack

An optical fiber rack includes a rack part on which a plurality of termination units arranged in a vertical direction are located, a first optical fiber housing part in which extra length wiring parts of a plurality of first optical fibers connected with each of the plurality of termination units are housed, a second optical fiber housing part in which an extra length wiring part of a second optical fiber connected with any of the termination units is housed, and a partition plate partitioning the first optical fiber housing part from the second optical fiber housing part.

Optical fiber rack

A termination unit located on a rack part of an optical fiber rack includes a housing a plurality of first optical fibers located in the housing, the plurality of first optical fibers being fusion spliced to a multi fiber cable introduced from an outside of the optical fiber rack, an adapter group including a plurality of adapters in a line in the housing, the plurality of adapters being respectively connected to the plurality of first optical fibers on an inside of the housing and being respectively connected to a plurality of second optical fibers on an outside of the housing, and an optical fiber passing part through which at least one optical fiber is configured to pass, the optical fiber passing part being located in at least one of: the adapter group, and between the housing and the adapter group in an arrangement direction.

Termination unit and optical fiber exchange method using the same

A measurement system is a measurement system inspecting an optical transmission line configured by connecting a plurality of optical cables, each of which includes a plurality of optical fibers, wherein the optical transmission line includes a plurality of optical fiber lines configured by connecting the plurality of optical fibers in the plurality of optical cables, the measurement system including: a first measurement device configured to be disposed at a first end of the optical transmission line; and a second measurement device configured to be disposed at a second end of the optical transmission line, wherein the first measurement device and the second measurement device perform a first measurement to inspect whether the optical cable is misconnected, and a second measurement to inspect the plurality of optical fiber lines in a case where it is determined that there is no misconnection in the first measurement.

Measurement system and measurement method

A termination unit to be located on a rack part of an optical fiber rack includes a housing, a plurality of first optical fibers located in the housing and fusion spliced to a multi fiber cable introduced from an outside of the optical fiber rack, a plurality of external connection adapters located in a line in a first direction, and in which the plurality of first optical fibers are respectively connected to the plurality of external connection adaptors on an inside of the housing, a guide part located on one side surface of the housing crossing the first direction, and extending in a second direction crossing the first direction, and a fixing member attached to the one side surface of the housing, and to which the multi fiber cable is fixed. The fixing member is movably attached along the guide part.

Termination unit

Tensile strength of a tape layer in the lengthwise direction is selected to be higher than adhesive force of the tape layer to optical fiber cores. Further, position limiting portionsby which the positions of a plurality of optical fiberscan be limited are formed in a flexible filmfor tape core assembly which film is used for integrating the plurality of optical fibersas a tape. Further, a ribbon-like optical fiber core assemblyaccording to the invention including a plurality of optical fiber coresarranged planarly at designated intervals, an adhesive layerdisposed so as to surround the optical fiber cores, and filmsandintegrated with the optical fiber coresby the adhesive layer

Ribbon-like optical fiber core assembly, method for producing the same, tape core assembly-containing connector, tape core assembly-containing optical fiber array, and optical wiring system

An optical connector ferrule molding diefor molding an optical connector ferrule having a plurality of optical fiber holes comprises an upper diea lower dieand an intermediate diewhereas the intermediate diecomprises a plurality of optical fiber hole forming pinsfor forming optical fiber holes. The lower dieis provided with a protrusionfor forming a window hole of the optical connector ferrule, whereas the optical fiber hole forming pinsprojecting from the intermediate dieare secured by through holespenetrating through the protrusionand V-grooves

Method of making optical connector ferrule, die for making optical connector ferrule, optical connector ferrule made by this method, and optical connector and optical wiring system using the same

Method and metal mold for manufacturing optical connector ferrule, optical connector ferrule manufactured by using the method, and optical connector and optical wiring system using the ferrule

A pair of guide holes for guide pin insertion and one or a plurality of optical fiber positioning holes extending inwardly from the front end surface are formed in a connector ferrule of an optical connector. A chamfer is formed on the opening edge portion of the guide hole of the connector ferrule on the front end surface side thereof. The opening diameter R of the guide hole at the front end surface is preferably 1.0 to 1.5 mm when the front end surface is slant polished at an angle of 8 degrees. Furthermore, the chamfering angle &#x3b8; of the chamfer is preferably 90 to 150 degrees. Moreover, the average particle size of the filler contained in the connector ferrule is no more than 20 &#x3bc;m. As a result, the surface of the chamfer is comparatively smooth.

Optical connector ferrule, optical connector and making method for them

An optical fiber suitable for use in a single fiber or multifiber optical connector or array is structured with a core region and a cladding region surrounding the core region, and exhibits a bending loss of a fundamental mode of the fiber at a wavelength &#x3bb; is lower than 0.1 dB/m at a diameter of 15 mm, a mode-field diameter of the fundamental mode at an end of the fiber at the wavelength &#x3bb; is between 8.0 &#x3bc;m and 50 &#x3bb;, and a bending loss of a first higher-order mode at the wavelength &#x3bb; is higher than 1 dB/m at a diameter of 30 mm. The fiber may be multistructured, wherein the cladding region comprises a main medium and a plurality of sub medium regions therein to form a spatially uniform average refractive index.

Microstructured optical fiber

An optical connector according to the present invention has a ferrule body provided with a fiber positioning hole, a pair of guide holes into which guide pins are inserted, and a connecting end face in which ends of the fiber positioning hole and guide holes open. A chamfer portion equivalent to a part of a surface of a body of revolution is formed at each guide hole on the connecting end face side. Further, the connecting end face is formed at an angle relative to a plane normal to the center axes of the pair of guide holes. In this structure, the slope of the connecting end face can suppress degradation of connection loss, and the provision of the chamfer portions can facilitate insertion of the guide pins, prevent damage of the connecting end face due to the guide pins, and also suppress degradation of connection loss due to the damage.

Optical connector and backplane assembly

Growing community of inventors

Osaka, Japan

Tomohiko Ueda