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Dive into the research topics where Hiromu Iwata is active.

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Featured researches published by Hiromu Iwata.


Japanese Journal of Applied Physics | 2006

Apodization Method Owing to the Finite Length of UV Laser Coherence in Fabricating Fiber Bragg Gratings

Yoshifumi Suzaki; Hiromu Iwata; Keisuke Nakayama; Yasuo Mizutami; Makoto Yamauchi; Eiji Izumikawa; Takashi Yokouchi; Seiki Ejima

A very effective apodization, in which side lobes are suppressed to below a particular noise level, is found to operate automatically in a two-beam interference device for fabricating fiber Bragg gratings when a pair of mirrors deflecting two beams are off parallel to each other. This is considered to be a consequence of the short temporal coherence length of the KrF excimer laser used.


Archive | 2013

OPTICAL FIBER FOR A SENSOR AND A POWER DEVICE MONITORING SYSTEM

Ko Imaoka; Yoshifumi Suzaki; Hiromu Iwata; Kiyoshi Nakagawa


Archive | 2013

Optical fiber for temperature sensor and power device monitoring system

Ko Imaoka; Yoshifumi Suzaki; Hiromu Iwata; Kiyoshi Nakagawa


Transactions of the JSME (in Japanese) | 2015

Axial force sensor for screw bolt using optical fiber grating for detection of strain

Hiromu Iwata; Minako Kashiwa; Yasuo Mizutani


The Proceedings of Design & Systems Conference | 2014

2419 A Study of Axial Force Sensor for Screw Bolt using Optical Fiber Grating

Hiromu Iwata; Minako Kashiwa; Yasuo Mizutani


The Proceedings of Conference of Chugoku-Shikoku Branch | 2013

702 Study of Current Sensor using Optical Fiber Grating

Hiromu Iwata; Atsumi Kitayama; Kou Imaoka; Yoshifumi Suzaki; Kouichi Maru; Kenzou Yamaguchi


Archive | 2012

Fiber for sensor

Kenji Shibata; 顕次 柴田; Ko Imaoka; 功 今岡; Yoshifumi Suzaki; 嘉文 須崎; Hiromu Iwata; 岩田 弘; Takashi Yokouchi; 孝史 横内; Kiyoshi Nakagawa


Journal of The Society of Materials Science, Japan | 2010

Characterization with the Simulation of Transmission Spectra in Long-Period Fiber Grating Fabricated by the Point Exposure Method

Yoshifumi Suzaki; Yohei Sawamura; Fuminori Imatake; Hiromu Iwata; Takashi Yokouchi; Seiki Ejima


Journal of The Society of Materials Science, Japan | 2010

Dependence on Grating Length of Transmission Spectra of Long-Period Fiber Bragg Grating

Yusuke Sato; Takashi Yokouchi; Hiromu Iwata; Yosihumi Suzaki; Seiki Ejima


Proceedings of JSPE Semestrial Meeting | 2009

Characteristic Estimation and Mode Identification of Long-period Fiber Grating Fabricated by Point Exposure Method

Yohei Sawamura; Hiroaki Fujino; Yoshifumi Suzaki; Hiromu Iwata; Takashi Yokouchi

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Makoto Yamauchi

National Institute of Advanced Industrial Science and Technology

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Kenji Sakamoto

National Institute for Materials Science

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