Nippon Electric Glass Co., Ltd.

Nec Corporation

Nobuo Funabiki

Hirokazu Takeuchi

Sotohiro Nakajima

Kazuya Saito

Kazuhiko Kurata

Masanori Wada

Tetsuji Ueda

Masahiro Kobayashi

Takehiko Isomoto

Shuhei Ogawa

Hirokazu Takeuti

Masanao Iida

Syojirou Horibe

Masayo Hada

Yoshio Tanaka

A laminated glassincludes a resin plateas a core material, a first glass sheetdisposed on one surface side of the resin platevia a first adhesive layer, and a second glass sheetdisposed on the other surface side of the resin platevia a second adhesive layer. A heat reflective filmis disposed in the first adhesive layer, and a heat absorbing filmis disposed in the second adhesive layer, the heat absorbing filmfunctioning as a light absorbing member capable of absorbing a portion of incident light. The heat reflective filmis disposed closer to the first glass sheetthan the heat absorbing filmis.

Laminated glass

What is achieved is an optical wavelength multiplexer/demultiplexer not necessarily requiring the function of adjusting the optical path. A value (&#x394;L&#x2212;&#x394;L)/L obtained by dividing a difference between a maximum value &#x394;Land a minimum value &#x394;Lof &#x394;L in a range of &#x2212;40&#xb0; C. to 80&#xb0; C. by L is 8&#xd7;10or less where L represents a length of a crystallized glass () at 30&#xb0; C. and &#x394;L represents a difference between a length (L) of the crystallized glass () at each of the temperatures and the length (L) thereof at 30&#xb0; C.

Crystallized glass and method for manufacturing same

One or a plurality of flat portions and one or a plurality of partial cylindrical portions connected to such flat portions are an exterior surface of a glass capillary tube for holding an optical fiber, with all partial cylindrical portions having the same single central axis and being defined by a common radius, and an insertion hole, into which an optical fiber is inserted and held, is formed at a position deviated from the central axis in a direction perpendicular to one of the flat portions, which serves as a benchmark.

Capillary tube for holding optical fiber

An optical fiber array substratehas, in one surface thereof, eight V-groovesfor securing eight optical fibersaligned in parallel to each other, and V-shaped side groovesformed outside of the respective outermost V-grooveslocated at the opposite sides of the substrate. The apexes of the outside ridgesanddefining the outermost V-groovesare at the same height as the apexes of the inside ridgesand, the height of the bottomof the side grooveis lower than that of a contact pointbetween the ridge line of the V-grooveand optical fiber

Optical fiber array substrate

An object of the present invention is to very accurately position and align a plurality of optical fibers in each groove of a substrate for an optical fiber array, without leading to inappropriate upsizing and complication of an apparatus and increase in cost. To achieve the object, an optical-fiber aligning partof a substrateis formed, in parallel, with a plurality of groovesat least on the top thereof, the plurality of grooves retaining and aligning a plurality of optical fibersA cross section perpendicular to a longitudinal direction of the groovesis recessed at a center portion of the top in the widthwise direction, and depths A of the groovesprovided at the center portion are shallower than depths A of the groovesprovided at both ends in the widthwise direction.

Substrate for optical fiber array and method for fabricating the same

Optical fiber array substrate and method for producing the same

A glass capillary tubeis connected and fixed in a straight line to an optical componenthaving a substantially rectangular cross-section perpendicular to an optical axis. Moreover, a top-surface side end portionand a rear-surface side end portionof an exterior surfaceof the glass capillary tubeare positioned at the same level as the top surface and the rear surface of the exterior surface of the optical componentin the height-wise direction, respectively, while the central axis of an insertion hole, which is provided in the glass capillary tubeand into which an optical fiberis inserted and fixed, is matched with the optical axisof the optical component

Capillary tube for holding optical fiber and connecting structure for optical component

A preliminary member of an optical device component with optical fiber comprises a long capillary tube made of glass or crystallized glass and an optical fiber which is fixed in the inner hole of the long capillary tube with adhesive. The overall length of the preliminary member is a plurality of times that of the optical device component or more. A plurality of short capillary tubes with optical fibers are formed by cutting the preliminary member. Thereafter, by polishing both end faces of the short capillary tube with optical fiber, an optical device component can be obtained.

Preliminary member of optical device component with optical fiber

A ferrule for an optical connector is of glass which is strengthened by ion-exchange.

Growing community of inventors

Otsu, Japan

Nobuo Funabiki