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Your search keyword '"Matsunaga, Tohru"' showing total 26 results
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26 results on '"Matsunaga, Tohru"'

2. Estimation of insertion of loss of a holographic switch with an optically addressed spatial light modulator

Author

Yamazaki, Hirofumi and Matsunaga, Tohru

Subjects
Electrooptics -- Research, Holography -- Research, Spatial light modulators -- Research, Astronomy, Physics
Abstract

We investigate the cause of the insertion loss of our holographic switch by determining the relation between the diffraction efficiency and the hologram patterns generated by the control beams. According to the calculation the theoretical insertion loss is 7.4 dB with loss distribution of 0.03 dB under the conditions of a previous experiment. We find that incomplete storage of the interference pattern on the optically addressed spatial light modulator is the strongest factor determining the insertion loss.

Published
1999

3. 4 x 1204 holographic switching with an optically addressed spatial light modulator

Author

Yamazaki, Hirofumi, Matsunaga, Tohru, Fukushima, Seiji, and Kurokawa, Takashi

Subjects
Holography -- Research, Spatial light modulators -- Research, Ferroelectric crystals -- Research, Liquid crystals -- Research, Astronomy, Physics
Abstract

We extended the scale of a previously reported holographic switch [Appl. Opt. 34, 8137 (1995)] in which each input is assigned to one of the control light sources to control a large-scale switch with low power. The average losses of the four inputs were 28, 33, 35, and 36 dB. The average cross-talk-to-signal ratio of one of the inputs was -16 dB. Key words: Holographic switching, optical interconnects, spatial light modulator, ferroelectric liquid crystal.

Published
1997

20. Efficacy of Defibrinogenation and Steroid Therapies on Sudden Deafness

Author

Kubo, Takeshi, Matsunaga, Tohru, Asai, Hideyo, Kawamoto, Kazutomo, Kusakari, Jun, Nomura, Yasuya, Oda, Makoto, Yanagita, Noriyuki, Niwa, Hideto, Uemura, Takuya, and Komune, Shizuo

Abstract

• Effects of defibrinogenation therapy and steroid therapy for sudden deafness were compared by paired double-blind testing. The average hearing recovery for five frequencies (250 to 4000 Hz) was more than 30 dB; overall improvement rate was 57.3% (47/82) for the patients assigned to defibrinogenation therapy and 38.7% (31/80) for the patients assigned to steroid therapy. Thus, the former treatment resulted in significantly better hearing recovery.(Arch Otolaryngol Head Neck Surg 1988;114:649-652)

Published
1988
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24. Practica Oto-Rhino-Laryngologica

Author

Sakai, Shun-ichi, primary, Murata, Masami, additional, Itoh, Mahito, additional, Sasaki, Ryoji, additional, Uetzuka, Hiromu, additional, Sakai, Kunio, additional, Nimura, Tamiko, additional, Suitsu, Yuriko, additional, Asai, Hideyo, additional, Furukawa, Yutaka, additional, Tagami, Etsuko, additional, Goto, Kazuhiko, additional, Watanabe, Yasuo, additional, Mutoh, Mikiji, additional, Mukai, Teizo, additional, Okawachi, Ichiro, additional, Matsunaga, Takashi, additional, Hyo, Yukikazu, additional, Kakiuchi, Sumi, additional, Matsunaga, Tohru, additional, Ozaki, Masayoshi, additional, Ishida, Minoru, additional, Seo, Setsu, additional, Inatome, Kin-ichi, additional, Nakamura, Toshiharu, additional, Kawamura, Yasuo, additional, Osakada, Yoshio, additional, and Ohshima, Ichiro, additional

Published
1981
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