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Dive into the research topics where Yuko Takei is active.

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Featured researches published by Yuko Takei.


Fiber Optic Gyros: 15th Anniversary Conf | 1992

AM noise reduction in fiber optic rotation sensors

Hidehiko Negishi; Yoshinori Takeuchi; Yoshihiko Honjoya; Yuko Takei; Yukio Kasahara

We evaluated the phase and amplitude characteristics of output noise in fiber optic rotation sensors with a single-mode fiber sensing loop. We found that the major source of the noise was amplitude modulation (AM) noise caused by a phase modulator, and that the AM noise always had an approximate 90 degrees phase difference from the rotation signal. Thus, by adjusting the lock-in reference signal phase to the node of the AM noise, the output drift was markedly reduced to about 2 deg/h.


Archive | 2009

Communication terminal device, communication control method and communication control program

Yuko Takei; Yoshihiko Kitamura


Archive | 1991

Optical phase modulator with asymmetric piezoelectric vibrator

Yoshinori Takeuchi; Hidehiko Negishi; Yuko Takei; Ken Idota


Archive | 2004

MULTIMEDIA CONTENT PROVIDING SYSTEM, HOME CONTENT SERVER, AND VIEWING DEVICE

Takahiro Aoyama; Giichi Ishii; Tsutomu Iwai; Tomohiro Iwama; Tomoharu Kaneko; Tsutomu Kito; Yuko Takei; Masato Tanaka; 勉 岩井; 智大 岩間; 正人 田中; 義一 石井; 優子 竹居; 友晴 金子; 恭弘 青山; 勉 鬼頭


Archive | 1993

Optic rotation sensing apparatus and related method including providing synchronous detection at a phase at which the AM noise is minimized

Hidehiko Negishi; Yoshinori Takeuchi; Yuko Takei; Yoshihiko Honjoya


Archive | 1991

Optical phase modulator

Yoshinori Takeuchi; Yuko Takei; Hidehiko Negishi; Ken Idota


Archive | 1991

Sensing coil and fiber-optic gyroscope using the same

Yoshinori Takeuchi; Hidehiko Negishi; Yuko Takei


Archive | 2001

Radio communication equipment and method

Satoshi Iino; Tomohiro Iwama; Mikito Sugiura; Yuko Takei; 智大 岩間; 幹人 杉浦; 優子 竹居; 聡 飯野


Archive | 2005

Information system, mobile terminal apparatus, and server apparatus

Takahiro Aoyama; Giichi Ishii; Tsutomu Iwai; Tomohiro Iwama; Tomoharu Kaneko; Tsutomu Kito; Yuko Takei; Masato Tanaka; 勉 岩井; 智大 岩間; 正人 田中; 義一 石井; 優子 竹居; 友晴 金子; 恭弘 青山; 勉 鬼頭


Archive | 2005

Reporting System, Mobile Terminal Device, and Server Device

Tomoharu Kaneko; Yoshikazu Ishii; Tsutomu Kito; Tomohiro Iwama; Yuko Takei; Masato Tanaka; Yasuhiro Aoyoma; Tsutomu Iwai

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Masato Tanaka

National Institute of Advanced Industrial Science and Technology

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