巻号一覧
16 巻, 3 号
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大塚 喜弘1988 年 16 巻 3 号 p. 88-89
発行日: 1988/03/28
公開日: 2010/02/26
ジャーナル フリーPDF形式でダウンロード (176K) -
杉岡 幸次, 豊田 浩一1988 年 16 巻 3 号 p. 90-100
発行日: 1988/03/28
公開日: 2010/02/26
ジャーナル フリーSeveral published works of basic process and some applications of laser doping into semiconductors are reviewed. The features of laser doping such as low temperature process and simplified process are attractive in future microelectronics technology. Furthermore, in the laser doping, it is possible to form very shallow active layer with very high dopant concentration. The laser direct writing and pattern transfer methods have been also applied in realizing submicron feature size of the doped region.抄録全体を表示PDF形式でダウンロード (1394K) -
上野 敏行, 竹内 延夫, 馬場 浩司, 桜井 捷海1988 年 16 巻 3 号 p. 101-118
発行日: 1988/03/28
公開日: 2010/02/26
ジャーナル フリーIn this paper, the performance of the m-sequence modulation laser radar is theoretically analyzed. The principle of the measurement is described in terms of the digital signal processing system. The analysis shows that the m-sequence modulation laser radar transmits the modulated laser pulses but the measured response is the same as the response from the scatterer obtained by a single pulse laser radar.
The statistical variation of the measured laser radar response due to the photodetector noise is given and the result of the computer simulation is in good agreement with the theoretical estimation. The authors com-pare the m-sequence method with the average response method in terms of the variance of the measured response and prove that the former is superior to the latter.
It is also shown that the ghost response appears if the measuring system has nonlinear characteristics such as the distorted waveform of modulated laser pulses or the miscounting in the photon counting detection.抄録全体を表示PDF形式でダウンロード (1593K) -
モード競合シミュレーションによる偏光率計算菅原 宏之1988 年 16 巻 3 号 p. 119-127
発行日: 1988/03/28
公開日: 2010/02/26
ジャーナル フリーA mode calculation code in stable resonators was developed using the fast-Fourier-transform method, which can simulate a competition between two beams in the same active medium, such as two linearly-polarized beams. The code developed can be applied to a calculation of amplification characteristics by its sheet active region approximation, a calculation of oscillation characteristics in a large-Fresnel-number resonator by means of D. Phelps' method, and a calculation of multimode oscillation characteristics by using average field intensity as the laser beam intensity in gain coefficient calculation.
The code is applied to calculations of planes of polarization for higher order beam modes to show that a degeneracy of two modes with 90 degree out of phase leads to a linearly-polarized oscillation of a higher order mode, and to explain a well-known experimental result that such a higher order beam mode as TEM01 can be linearly polarized. The code is also applied to calculations of beam diameters. And the calculated results are presented.抄録全体を表示PDF形式でダウンロード (1012K) -
真峯 隆義, 本田 和生, 米山 修, 小島 千秋1988 年 16 巻 3 号 p. 128-137
発行日: 1988/03/28
公開日: 2010/02/26
ジャーナル フリーThe one watt broad area laser diodes have been developed. The threshold current was 400 mA and the slope efficiency was 1.0 W/A. The far-field radiation pattern parallel to the junction was single-lobed which is understood to be due to the coupling among the fundamental transverse mode and higher transverse modes. The emission wavelength is accurately tuned with a built-in thermo electric cooler which is desirable for pumping solid state lasers. The operating lifetime is expected to be more than ten thousand hours at operating temperatures lower than room temperature. The laser diode pumped solid state lasers and their combination with second harmonic generators are expected to open new dimensions in laser diode applications.抄録全体を表示PDF形式でダウンロード (986K)
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