The Journal of the Institute of Electrical Installation Engineers of Japan
Online ISSN : 2188-6946
Print ISSN : 0910-0350
ISSN-L : 0910-0350
Volume 28 , Issue 9
Showing 1-19 articles out of 19 articles from the selected issue
  • Yukihiro Fukui, Katsuo Okumura, Yoshihiro Murooka
    2008 Volume 28 Issue 9 Pages 714-720
    Published: 2008
    Released: January 21, 2015
    JOURNALS FREE ACCESS
    A new optical field sensor using a Pockels device for measuring the electric field distribution in the discharge space has been developed. This system consists of both azimuth angle modulation and PS-polarized light division methods. By using a ferroelectric liquid crystal phase modulator (FLCM) instead of an azimuth angle modulator,we succeeded to theoretically eliminate all of noises existing in the optical field measurement system,especially,the birefringence eftects in a longer optical fiber cable. This fact has been confirmed experimentally under the following circumstance; (1) the size of Pockels crystal is 1mm φ in diameter and 5mm in length,(2 ) the gap length between needle and plane electrodes is 20mm,(3 ) A.C applied voltage is 1 to 15 kV,etc. From the theoretical and the experimental works,it is possible to say that the present system is a kind of noiseless sensors and furthermore is one of the most useful sensors for holding the safety in the field of electrical insulation facilities.
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