Výsledky vyhledávání - "Takao Nakazawa"

Frequency stabilization of a semiconductor laser using the magneto-optical effect and the saturated absorption optical system

Autor: Takashi Sato, Hiroyuki Nakano, Minoru Shimba, Takao Nakazawa, Takashi Ueno

Publikováno v: Electronics and Communications in Japan (Part II: Electronics). 77:1-11

When the oscillation frequency of a laser diode is stabilized by means of the absorption line of atoms and molecules, a general method used was to apply infinitesi mel modulation directly on the bias current of the laser diode. However, this method h

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::572feaac67135d140018bd40f24235bb
https://doi.org/10.1002/ecjb.4420770301

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Use of the faraday effect for frequency stabilization and control of a semiconductor laser

Autor: Takashi Sato, Takao Nakazawa, Takashi Ueno, Minoru Shimba, Hitoshi Rikukawa

Publikováno v: Electronics and Communications in Japan (Part II: Electronics). 76:1-10

To date, frequency stabilization methods for semiconductor lasers mainly use the absorption line of an atom or molecule to modulate the frequency of laser light slightly so as to obtain a control signal. As a result, an oscillation bandwidth broadeni

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3e5e694da7f29103cde98524110be8ba
https://doi.org/10.1002/ecjb.4420760501

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Frequency stabilization of a semiconductor laser using the faraday effect of the saturated absorption spectroscopy signal of rb atoms

Autor: Takashi Sato, Takao Nakazawa, Minoru Shimba, Takashi Ueno, Hiroyuki Nakano

Publikováno v: Electronics and Communications in Japan (Part II: Electronics). 76:12-21

To stabilize the oscillation frequency of a semiconductor laser by using an absorption spectrum of atoms and molecules as a frequency reference, modulation of an injection current of the laser has commonly been adopted since it gives a high detection

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5492bf9007112cf439751c87474a6c0f
https://doi.org/10.1002/ecjb.4420760702

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Change in Mechanical Properties of Early-Age Concrete under Repetitive Compressive Stress

Autor: Takao Nakazawa, Fujio Imai, Ryo Sukita, Kozo Onoue

Publikováno v: Scopus-Elsevier

This paper deals with the effect of repetitive compressive stress on the change in mechanical properties of early-age concrete. The concrete used was high strength and high flow type and the mix proportion was the same as the one which was employed i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::446184b664e2b6aace24fae9e2d084d6
https://doi.org/10.2749/222137810796025320

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Estimation of Parameters for the Temperature Analysis of Concrete using 3-D FEM

Autor: Hidehiko Ogata, Fumiyoshi Kondo, Masato Kunitake, Takao Nakazawa

Publikováno v: Computational Mechanics ’95 ISBN: 9783642796562

About 90 percent of temperature cracking in the walls of concrete structures is continuous cracking with a cracking width of 0.1 ~ 0.3 mm [1], Therefore, temperature cracking has become a problem, since it causes fine sight loss, reduced strength and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::62060c7c04ea5b1b280b096da391179e
https://doi.org/10.1007/978-3-642-79654-8_21

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