Fujitsu Corporation

Kazunori Miura

Goji Nakagawa

Seimi Sasaki

Naoki Yamamoto

Kazuhiro Tanaka

Ryoichi Ochiai

Ippei Sawaki

Hideo Sumiyoshi

Norifumi Shukunami

Yoshihiro Yoneda

Haruhiko Tabuchi

Hironao Hakogi

Koji Terada

Masaaki Norimatsu

Yoshio Shimano

Takashi Kojima

Akira Fukushima

Tsugio Kumai

Youske Yamazaki

Hiroki Horiuchi

Taizo Nosaka

An optical fiber reel storing a plurality of optical fibers having an annular frame; a first reel portion provided around an radially outer peripheral surface of the annular frame and receiving at least one of the plurality of optical fibers wound up around the radially outer peripheral surface; and, a second reel portion provided radially inside the annular frame and housing at least one of the plurality of optical fiber therein.

Optical fiber reel

An optical module including a substrate, an optical waveguide formed on the substrate, and an optical element mounted on the substrate so as to be optically coupled to an end of the optical waveguide, for performing conversion between light and electricity. The optical module further includes a transparent resin for covering at least an optical coupling portion between the optical waveguide and the optical element, and a thermoplastic resin for covering only the optical element and its periphery including the transparent resin to seal the optical element.

Resin sealed optical module

An optical module including a plurality of leads, a substrate having a first groove and a plurality of conductor patterns electrically connected to the leads, a ferrule having a center hole in which an optical fiber is inserted and fixed, the ferrule being mounted in the first groove of the substrate so that one end of the ferrule projects from an end surface of the substrate, and an optical element mounted on the substrate for making conversion between light and electricity. The optical module further includes a transparent first resin for covering at least the optical element and the other end of the ferrule, and a second resin for enclosing all of the leads, the substrate, the ferrule, the optical element, and the first resin except the one end of the ferrule and a part of each of the leads.

Optical module packaged with molded resin

An optical module including a lead frame having a plurality of leads, a substrate mounted on the lead frame and having a plurality of conductive patterns, an optical element mounted on the substrate for making conversion between light and electricity, a sleeve placed on the substrate and having a front end adjacent to the optical element, and a first resin for encapsulating the optical element. The first resin has transparency to the light related to the optical element. The first resin is formed with a convex portion closing the front end of the sleeve. The conductive patterns of the substrate are connected through wires to the leads of the lead frame, respectively. The optical module further includes a molded second resin for enclosing all of the substrate, the optical element, the sleeve, the first resin, the wires, and the lead frame except a part of the sleeve and a part of each of the leads.

Optical module encapsulated with resin and manufacturing method therefor

A photodetector module including a support substrate having a main surface, an optical waveguide mounted on the support substrate and having an end face for emerging a light beam along a first optical path, and a photodetector mounted on the support substrate so that the light beam emerged from the end face of the optical waveguide is incident on the photodetector, the photodetector having a photodetecting portion responding to the light beam incident on the photodetector. The photodetector module further includes a first inclined surface formed on a substrate of the photodetector for refracting the light beam along the first optical path to a second optical path, and a second inclined surface for totally reflecting the light beam along the second optical path to a third optical path substantially perpendicular to the photodetecting portion.

Photodetector module

An optical module includes a mounting board, an optical element, an optical fiber having an optical axis, the optical fiber inserted in the mounting board to align the optical axis with the optical element, and a positioning mark provided to position the optical element on the mounting board. The mounting board has a groove provided in the middle of the mounting board and extending in a direction of the optical axis of the optical fiber, the groove enclosing the optical fiber when inserted. The groove has a vertical wall which is perpendicular to the direction of the optical axis and confronts a leading edge of the optical fiber when inserted. The positioning mark is located adjacent to an internal edge of the groove where the vertical wall is provided on the mounting board.

Optical module for connecting optical element and optical fiber

An optical transmission terminal device including a printed wiring board and an optical module mounted on the printed wiring board. The optical module includes an optical component mounting substrate, a photoelectric converter mounted on the substrate, a first optical fiber having one end optically coupled to the photoelectric converter, and a ferrule mounted on the substrate so as to partially project from the substrate. The other end portion of the first optical fiber is inserted and fixed in the ferrule. A wiring pattern formed on the printed wiring board and a feed electrode formed on the substrate are connected together by wire bonding. An optically coupled portion between the photoelectric converter and the first optical fiber and a connected portion between the wiring pattern and the feed electrode are commonly covered with a transparent resin. The optical transmission terminal device further includes an optical fiber connector housing mounted on the optical module for allowing connection of the first optical fiber to a second optical fiber.

Optical transmission terminal device

In an optical parts fixing device of the present invention, a substrate has an extension groove formed on an optical fiber fixing groove and has a width wider than that of the optical fiber fixing groove, or a substrate has the third groove which crosses end portions, opposed to each other, of the first groove for fitting an optical fiber therein and the second groove for fitting an optical device therein.

Optical parts fixing apparatus and method of manufacturing the same

An optical link module connection system for connecting an optical fiber to an optical link module that performs conversion between an electrical signal and an optical signal. The system is aimed at reduction of the manufacturing cost of printed circuit boards containing those fiber-optic products by allowing an automated soldering process to be applied thereto. The system will also facilitate the product handling as well as storage and improve the board space utilization by shortening the length of the optical fiber. While optoelectronic conversion means comprises a first ferrule, coupling means consists of a second ferrule, a split sleeve, etc. The first ferrule is inserted into the split sleeve in the coupling means so as to contact the second ferrule, thus completing an optical path between a first optical fiber and a second optical fiber. The optoelectronic conversion means will be soldered to a printed circuit board before being joined to the coupling means. That is, when soldering the printed circuit board, the second optical fiber having only a poor heat resistance is not yet mounted on the board, thus allowing automated soldering equipment to be used for the process.

Optical link module connection system

A magneto-optic disc recording and reading head having an orthogonal two mode oscillation type of external resonator having a semiconductor laser, including a device for differentiating the directions of propagation of two modes of light from one another to prevent the two modes of light from being united in the laser.

Magneto-optic reading and recording head using external resonator having

An optical beam profile transforming element which is a monolith solid element with a low loss is provided by placing at least two parallel plastic wave guide layers in contact with each other, each of the at least two parallel plastic wave guide layers having a refractive index gradually varying in the direction of light propagation so that the at least two parallel plastic wave guide layers as a whole transform a profile of an optical beam in the direction vertical to the layers. The variation of the refractive index can be obtained by varying a concentration of a dopant in a matrix, and the variation of the concentration of a dopant in a matrix can be obtained by varying an irradiation amount of a combination of a matrix and a dopant monomer with an ultra-violet ray.

Growing community of inventors

Kawasaki, Japan

Kazunori Miura