Sumitomo Electric Industries, Limited

Eiichiro Yamada

Kazuhito Saito

Mitsuaki Tamura

Hiroshi Suganuma

Hiroshi Kohda

Yuji Kobayashi

Akira Inoue

Koji Nakazato

Takemi Hasegawa

Takayuki Shimazu

Hidehisa Tazawa

Masato Tanaka

Hitoshi Hatayama

Takafumi Ohtsuka

Tatsuhiko Saito

Maki Ikeji

Maya Miyata

A wavelength multiplexer/demultiplexer includes a first collimator, M-number of second collimators, M-number of wavelength selective filters, and a base plate. Each of the wavelength selective filters includes a substrate having optical transparency and a multilayer film. The substrate includes a first main surface and a second main surface, and a bottom surface facing a placement surface of the base plate. The multilayer film is formed on the first main surface and transmits an optical signal in a specific transmission wavelength band and reflect an optical signal in a wavelength band other than the specific transmission wavelength band. Each of the wavelength selective filters is fixed to the placement surface by a cured adhesive. The cured adhesive is in contact with the bottom surface and is in non-contact with the multilayer film in at least one wavelength selective filter among the wavelength selective filters.

Wavelength multiplexer/demultiplexer

An optical module according to an embodiment includes a first optical component and a second optical component including a multicore fiber (MCF) and a spatial joining part. The first optical component includes a first uncoupled MCF having small optical coupling between cores and a first coupled MCF having a mode field diameter (MFD) larger than a MFD of the first uncoupled MCF. The second optical component includes a second uncoupled MCF having small optical coupling between cores and a second coupled MCF having a MFD larger than a MFD of the second uncoupled MCF. In the first coupled MCF and the second coupled MCF, crosstalk is periodically produced along the length direction of an MCF, and the total of the length of the first coupled MCF and the length of the second coupled MCF is a length L in which crosstalk is suppressed.

Optical module and method for manufacturing optical module

A detection apparatus for detecting foreign substances or defective goods, with which it is easy to accomplish inspection even if the inspection objects have a shape that tends to allow rolling, comprises: transparent membersand, partitionsand, a supplying unit, camerasand, a control unit. A removing apparatus, which includes such detection apparatus, comprises a suction controllerand suction nozzlesto. While the partitionsmove around, inspection objects A are each put in each cell of the partitions, and are photographed by the camerasand, from above and below the transparent members, respectively. The images obtained by such photographing are analyzed, and foreign substances or defective goods mingling in the inspection objects A are detected. The foreign substances or defective goods are separated from the conforming goods by selectively sucking the inspection objects A with the suction nozzlesto

Detecting apparatus, removing apparatus, detecting method, and removing 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

Provided is an imaging apparatus capable of obtaining images of an object at high precision even if the intensities of illuminating light temporally varies. The imaging apparatuscomprises a lamp unit, lens, a half mirror, a lens, a liquid crystal tunable filter, a lens, a reference mirror, a reference mirror, an image capturing unit, an operation unit, and a display unit. The reference mirrorsandare provided at the positions to which illuminating light led by an optical system for illuminating light is irradiated and which are located at a part of the view of the image capturing unit. The operation unitcorrects the value of the image part of the objectby using the value of the image part of the reference mirrorsandout of the images captured by the image capturing unit

Imaging apparatus

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

A method of and an apparatus for expanding the mode field diameter of an optical fiber by heating a specified region of the optical fiber with a uniform or desired temperature distribution for forming a thermally-diffused expanded core (TEC). The mode field diameter of the optical fiber is expanded by heating an optical fiberwith a burnerso as to thermally diffuse the dopant forming the refractive-index profile. The burnerhas a heating surfacein which a plurality of gas-issuing holesare arranged such that a plurality of parallel rows each of which is composed of a plurality of gas-issuing holesare parallel to the axis of the optical fiber

Method of and apparatus for expanding mode field diameter of optical fiber

In an optical fiber array, an optical fiber, a bundle of optical fibers or an optical fiber ribbon is mounted on an array substrate with a V-groove or V-grooves. A bare fiber portion in which a fiber coating is removed is placed in the V-groove, pressed by a presser memberand bonded by adhesives. At the front end, the fiber(s) is/are accurately positioned to connect to optical components or PLCs. The bare fiber portion contains a spliced portion of the dissimilar optical fibers having different mode field diameters and a mode field converting portion. The spliced portion of the dissimilar optical fibers is mounted on the array substrate. A flexible protection member is provided in the fiber coating portion extending over a rear edge of the array substrate. The optical fiber is bonded onto the array substrate, employing three kinds of adhesives that are different in the Young's modulus after hardening and the viscosity before hardening.

Optical fiber array

A vicinity of the fusion spliced portion of optical fibers is mounted on a heating board, after the dissimilar optical fibers having the different mode field diameters are fusion spliced. The vicinity of the fusion spliced portion of the optical fibers is then heated by a heat source via the heating board.

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Yokohama, Japan

Eiichiro Yamada