Hitachi, Ltd.

Hitachi-high-technologies Corporation

The Furukawa Electric Co., Ltd.

Hitachi Construction Machinery Co., Ltd.

Hitachi Communication Technologies, Ltd.

Hitachi Keiyo Engineering Co., Ltd.

Hitachi Taga Engineering, Ltd.

Kazuhiko Nishiyama

Toshiyuki Utsuki

Takao Itoh

Mitsuru Oonuma

Akira Omachi

Kazuhiko Hiraoka

Chikazu Yokoi

Tomohiro Shoji

Shoji Tomida

Yasuji Morishita

Takamasa Ishikawa

Kantaro Maruoka

Sayuri Hashizume

Sadao Tani

Hiroyuki Suzuki

Hiroshi Kobayashi

Toichi Hirata

Takeshi Yagi

Atsushi Ishibashi

Shigeaki Tanaka

Yasuhiko Nara

Masami Aoki

Kenichi Miyamoto

Kenta Kumagai

Yoshikatsu Kasahara

Keiichi Aiso

Makoto Fukatsu

Tsuyoshi Sakyo

Akitaka Takeuchi

Keiji Kamio

Kazuhisa Tamura

Shingo Hirose

Michiaki Kotsuka

Toshiaki Tsuda

Yasuo Uemura

Yoshiki Yoshida

Koji Hata

Yasushi Kimura

Koji Tahara

Masao Horie

Fumihito Katou

Youji Okabe

Masaki Kanahara

Katsumi Imaizumi

Toshio Ohdaira

Tomoyuki Shimaguchi

Yasushi Konomura

Yukio Niino

Kazuyuki Hukushima

Pump for liquid chromatograph analyzer

Control panel of detector for liquid chromatograph analyzer

Semiconductor testing machine

Network interface device

Magnetic disc storage unit for electronic computer

This invention relates to an optical fiber for long period grating (LPG), LPG components, and manufacturing method of LPG used as a mode coupler, an optical filter, etc. The optical fiber for LPG comprises a core layer, a first cladding layer that surrounds said core layer and transmits the cladding modes, and a second cladding layer that surrounds said first cladding layer and confines the optical signal of the cladding mode within said first cladding layer. The LPG component comprises an optical fiber for LPG, a coating reinforcement to cover and reinforce said optical fiber for LPG. The manufacturing method of LPG comprises a step of preparation of an optical fiber, a step of constructing the LPG on a predetermined region in said core of said optical fiber by irradiating laser light on said region over a predetermined period corresponding to the LPG, on the predetermined part of said optical fiber, and a step which covers and reinforces said grating region.

Optical fiber for long period grating, long period grating component and manufacturing method of the same

Front panel of a storage unit

Hydraulic excavator

Video tape recorder

A document processing printing apparatus such as a word processor has a main body constituted by a box-like frame. The frame includes a top surface serving as a flat paper supply guide surface. A print output unit included in the frame has at least one pair of rollers for transferring a recording paper along and on the paper supply guide surface and includes a flat platen, and a printing head.

Apparatus for processing and printing document

Portable computer

Audio disc player

Growing community of inventors

Tokyo, Japan

Kazuhiko Nishiyama