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Susumu NAMBA
1991 Volume 19 Issue 1 Pages
1-2
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Chiyoe YAMANAKA
1991 Volume 19 Issue 1 Pages
3-4
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Koichi SHIMODA
1991 Volume 19 Issue 1 Pages
5-7
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Hideya GAMO
1991 Volume 19 Issue 1 Pages
8-9
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Tomoo FUJIOKA
1991 Volume 19 Issue 1 Pages
10-12
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Jun-ichi NISHIZAWA
1991 Volume 19 Issue 1 Pages
13-14
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Kenichi IGA
1991 Volume 19 Issue 1 Pages
15-16
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Mitsuo MAEDA
1991 Volume 19 Issue 1 Pages
17-19
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Tatsuo YAJIMA
1991 Volume 19 Issue 1 Pages
20-22
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Noboru MATAGA
1991 Volume 19 Issue 1 Pages
23-25
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Keitaro YOSHIHARA
1991 Volume 19 Issue 1 Pages
26
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Akira YABE
1991 Volume 19 Issue 1 Pages
27-29
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Tetsuro IZUMITANI
1991 Volume 19 Issue 1 Pages
30-31
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Takatomo SASAKI
1991 Volume 19 Issue 1 Pages
32-34
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Kunihiko WASHIO
1991 Volume 19 Issue 1 Pages
35-37
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Haruhiko NAGAI
1991 Volume 19 Issue 1 Pages
38-39
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Toshimitsu ASAKURA
1991 Volume 19 Issue 1 Pages
40-41
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Yoichi FUJII
1991 Volume 19 Issue 1 Pages
42-43
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Sadao NAKAI
1991 Volume 19 Issue 1 Pages
44-46
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Tadao SHIMIZU
1991 Volume 19 Issue 1 Pages
47-48
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Tsuneo NAKAHARA
1991 Volume 19 Issue 1 Pages
49-52
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Teiji UCHIDA
1991 Volume 19 Issue 1 Pages
53-55
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Sadakuni SHIMADA
1991 Volume 19 Issue 1 Pages
56-58
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Jumpei TSUJIUCHI
1991 Volume 19 Issue 1 Pages
59-61
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Yoshiki ICHIOKA
1991 Volume 19 Issue 1 Pages
62-64
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Satoshi ISHIHARA
1991 Volume 19 Issue 1 Pages
65-67
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Tadashi SUETA
1991 Volume 19 Issue 1 Pages
68-70
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Hiroshi NISHIHARA
1991 Volume 19 Issue 1 Pages
71-74
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Uichi KUBO
1991 Volume 19 Issue 1 Pages
75-78
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Takuzo SATO
1991 Volume 19 Issue 1 Pages
79-81
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Shuntaro WATANABE
1991 Volume 19 Issue 1 Pages
82-84
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Masanobu YAMANAKA
1991 Volume 19 Issue 1 Pages
85-88
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Tokusuke HIROI
1991 Volume 19 Issue 1 Pages
89-92
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Naoki INOUE
1991 Volume 19 Issue 1 Pages
93-103
Published: January 29, 1991
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The applications of laser to the measurements of ultrasoniocs are described. Ultrasonic intensities can be measured by ultrasonic-light diffraction without disturbing ultrasonic fields. This optical method is capable of very precise measurements of an ultrasonic velocity and absorption in a wide frequency range. Studies are reviewed on ultrasonic relaxation, such as molecular vibration, ion association-dissociation relaxation, and critical phenomena of binary mixtures.
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Eiichi TSUCHIDA, Heihachi SATO
1991 Volume 19 Issue 1 Pages
104-113
Published: January 29, 1991
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On the basis of the transient mass-spectrum analysis of CO
2 gas dissociation for various input probe powers P
in, plasm alengths l, gas-flow velocities v and discharge currents I
dis, the dissociation rate (1-δ) and dissociation factor ξ of a CO
2 molecule are found to be modified in an open-cycle fast-axial flow (FAF) CO
2 laser amplifier. The effective dissociation constant D
eff related to (1-δ) is found to be corrected as a function of v and input probe irradiance I
in, and the dissociation-rate constant a
d concerned with the dissociation factor ξ is found to be modified to be v-dependent, though these have been regarded as a constant in a sealed-off system. Furthermore, suction rate δ
f due to the difference in the evacuation rate between CO
2 and CO or O
2 is found to be taken into consideration in (1-δ). Corrections for D
eff and α
d are also qualitatively discussed. By using these corrected parameters, the small-signal gain γ
0 is calibrated to explain experimental results satisfactorily.
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Iwao KITAZIMA, Ikuo OZAKI, Akira TAKINOMI, Zenshiro OKAI, Hiroshi IWAS ...
1991 Volume 19 Issue 1 Pages
114-121
Published: January 29, 1991
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Ultra-short infrared pulses were generated from a DNP 1040 dye laser synchronously pumped by a CPM glass laser newly constructed. Short (3-4 ps) pulses of about 100 per shot were obtained from the glass laser, in which a saturable absorber (NDL 112) of 0.5 mm in thickness was set in the center of a linear cavity of 1.0 min length and a glass rod (LHG-8.5
φ, 75
l) was placed between the cell and a coupling mirror. These glass laser pulses pumped synchronously the dye laser, the dye cell of which was contacted with the rear mirror and the cavity length was adjusted to be a half of the pump laser. The pulse width of the infrared dye laser of weak intensi-ty was measured by an optical Kerr shutter method with a CS
2 cell and the glass laser. The pulse width of a transmitted signal was 3.0 ps including the responce time of the Kerr shutter and the gate pulse width in convolution. The attainable pulse width of this dye laser is estimated to be ab-out 1.0 ps or less for the Gaussian pulse profile by deconvolution.
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Hajime NISHIOKA, Hideaki KURANISHI, Ken-ichi UEDA, Hiroshi TAKUMA
1991 Volume 19 Issue 1 Pages
122-129
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Sub-ps pulse generation by an absorber-amplifier system was demonstrated. A new scheme two-step pulse shaping was used to improve the compression ratio and stability. A uv saturable dye, acridine, having a low saturation energy and a low residual absorption was found to be suit-able for strong pulse shortening. We have obtained 400fs pulses with an output energy of 20mJ including ASE less than 0.1%.
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1991 Volume 19 Issue 1 Pages
plate1
Published: January 29, 1991
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