Other

Nippon Telegraph and Telephone Corporation

Ntt Electronics Corporation

Swcc Showa Cable Systems Co., Ltd.

Takashi Yoshida

Koichi Arishima

Shin Sumida

Fumihiro Ebisawa

Masaru Kobayashi

Kenji Yokoyama

Hiroshi Takahashi

Yasuyuki Inoue

Keiko Shiraishi

Katsunari Okamoto

Motohaya Ishii

Motohiro Nakahara

Ken Sukegawa

Akimasa Kaneko

Senichi Suzuki

Mamoru Hirayama

Fumiaki Hanawa

Kuninori Hattori

Yuichi Morishita

Mitsutoshi Hoshino

Hiroaki Yamada

Nobuhiro Funakoshi

Akira Morinaka

Tomotaka Murase

Kenji Yagi

Ken-ichi Muta

Miwa Urabe

Shigeko Toeda

Norio Sashida

Ken-Ichi Muta

This invention provides an optical fiber wiring board having excellent optical property, high reliability and high mounting property. This invention relates to an optical fiber component for connection having a substrate on which a plurality of optical fibers being wired, wherein a foam polymer layer is provided on a surface of the substrate wiring the optical fibers, or both on a surface of the substrate wiring the optical fibers and on a surface opposite to the surface of the substrate wiring the optical fibers, or so that whole of substrate is covered. The optical fiber component of the present invention may be further provided with a protective layer and may be filled with a filler. This invention provides also a manufacturing method of the optical fiber component for connection.

Optical fiber component for connection and manufacturing method thereof

In a light waveguide circuit including a plurality of waveguides having different length, a material (,) having a temperature coefficient of a refractive index including a symbol different from that of a temperature coefficient of an effective refractive index of the waveguide (,) is charged into a groove (,) formed by removing the upper clad and the core from the waveguide (,), or a groove (,) formed by removing the upper clad, the core and the lower clad from the waveguide (,). A difference in length of the removed portions between adjacent waveguides is proportional to a difference in length of the waveguides which were not removed and remained.

Optical waveguide circuit, its manufacturing method and optical waveguide module having the optical waveguide circuit

An optical fiber ribbon includes a plurality of optical fibers arranged in a row and an outer coating formed around the optical fibers. Each of the optical fibers has a core, a cladding, and a non-strippable thin coating made of synthetic resin with a Young's modulus of 50 kg/mm,to 250 kg/mm,at room temperature and coated around the cladding. The concentricity of the core to the diameter of the non-strippable thin coating is 1 &mgr;m or less.

Optical fiber

A UV-A, UV-B discriminating sensor provided with a photochromic compound or photochromic composition as the sensor portion, the photochromic compound or photochromic composition coloring under exposure to UV of wavelength greater than or equal to 280 nm or less than or equal to 400 nm, and wherein at least a portion of the photochromic layer is covered with a layer containing a pigment which absorbs UV of wavelength less than 320 nm, or with a layer containing a pigment which absorbs UV of a wave length greater than or equal to 320 nm but less than or equal to or equal to 400 nm.

UV-A, UV-B discrimination sensor

Growing community of inventors

Mito, Japan

Takashi Yoshida