文献一覧: 03870200 (ISSN) - Ceek.jp Altmetrics

2 0 0 0 非破壊検査用レーザー駆動γ線源

著者: 大石祐嗣
出版者: 一般社団法人レーザー学会
雑誌: レーザー研究 (ISSN:03870200)
巻号頁・発行日: vol.42, no.1, 2014

Laser-driven γ -ray is expected to be a very useful nondestructive diagnostic tool for large-scale structuresbecause of its potential for high energy, short pulse, high spatial resolution, compactness, and easycontrol. CRIEPI has proposed a radiographic testing system that consists of a compact laser-driven γ -raygenerator and a compact radiographic imaging system. It can be applied to a very narrow space (10 cm)in plant facilities, which are often crowded with pipes and other components. Here we review the recentprogress of our research on a laser-driven γ -ray source for nondestructive testing.

2021-11-01 08:28:27
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2 0 0 0 OA レーザーレーダーを用いた自動車のインテリジェント化と自動運転

著者: 大前学菅沼直樹清水浩
出版者: 一般社団法人レーザー学会
雑誌: レーザー研究 (ISSN:03870200)
巻号頁・発行日: vol.38, no.8, pp.565-570, 2010-08-15 (Released:2015-08-08)
参考文献数: 21
被引用文献数: 2 2

Applications of laser-radar in the fi eld of automatic and intelligent control of automobiles are explained.

2021-04-20 07:01:50
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2 0 0 0 OA 「スローライトと光バッファメモリ」特集号に寄せて

著者: 神成文彦
出版者: 一般社団法人レーザー学会
雑誌: レーザー研究 (ISSN:03870200)
巻号頁・発行日: vol.37, no.8, pp.570-571, 2009-08-15 (Released:2015-08-04)
参考文献数: 5
被引用文献数: 1

2020-07-17 10:14:24
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2 0 0 0 OA ラゲールガウシアンビームと光の軌道角運動量

著者: 宮本洋子
出版者: 一般社団法人レーザー学会
雑誌: レーザー研究 (ISSN:03870200)
巻号頁・発行日: vol.32, no.4, pp.232-236, 2004-04-15 (Released:2008-10-17)
参考文献数: 39
被引用文献数: 1 1

Laguerre-Gaussian beams are solutions of the paraxial wave equation and carry orbital angular momentum, which can be transferred to trapped particles. Orbital angular momentum of light beams can be better understood by considering angular momentum flux. Phase singularity and orbital angular momentum are different concepts and should be distinguished.

2020-06-15 13:17:24
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2 0 0 0 OA ターゲットインジェクター「コイルガン」の最適化と評価

著者: 吉田弘樹山平優
出版者: 一般社団法人レーザー学会
雑誌: レーザー研究 (ISSN:03870200)
巻号頁・発行日: vol.32, no.5, pp.343-347, 2004-05-15 (Released:2008-11-15)
参考文献数: 17
被引用文献数: 3 3 3

Target injector is an essential device to be established for a laser-fusion reactor. This paper describes current status of the injector research and introduces our research results of a coil gun. The drive circuits and trigger timing of the coil gun were optimized to improve injected projectile speed. The maximum speed at the first stage achieved to 8.7 m/s after optimization. The laser shot demonstration was carried out by the coil gun with an optically triggered Nd:YAG laser. The design guideline for a coil gun is discussed with experimental results and numerical simulation.

2020-04-16 21:19:25
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2 0 0 0 OA 誘導ラマン散乱顕微法による無染色生体イメージング

著者: 小関泰之伊東一良
出版者: 一般社団法人レーザー学会
雑誌: レーザー研究 (ISSN:03870200)
巻号頁・発行日: vol.39, no.12, pp.887-892, 2011-12-15 (Released:2015-09-03)
参考文献数: 38

We introduce stimulated Raman scattering (SRS) microscopy, which enables label-free biological

2019-10-20 15:16:28
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2 0 0 0 BD/DVD/CD互換機用多波長集積レーザーの開発

著者: 宮地護木村義則尾上篤
出版者: The Laser Society of Japan
雑誌: レーザー研究 (ISSN:03870200)
巻号頁・発行日: vol.35, no.2, pp.73-78, 2007-02-15
参考文献数: 9
被引用文献数: 1 1

We developed a wafer-level integration process for multiple-wavelength laser diodes. This integration process allows highly accurate and proximal alignment of emission spots, as well as high mass-productivity. Using this process, we fabricated blue/red and red/infrared two-wavelength laser diodes. In these laser diodes, the distance between two emission spots was approximately 3μm. Furthermore we fabricated blue/red/infrared three-wavelength laser diode whose emission spots were aligned within 10μm distance. Such a short spot distance allows the optical components of the pickup to be substantially simplified.

2018-12-18 14:45:15
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2 0 0 0 ボイジャー2号によせて

著者: 村井昭
出版者: 一般社団法人レーザー学会
雑誌: レーザー研究 (ISSN:03870200)
巻号頁・発行日: vol.14, no.4, pp.288-289, 1986

2018-12-12 05:35:13
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2 0 0 0 OA 光音響顕微鏡ならびに映像法とその生物および医学への応用

著者: 星宮務
出版者: 一般社団法人レーザー学会
雑誌: レーザー研究 (ISSN:03870200)
巻号頁・発行日: vol.32, no.10, pp.631-635, 2004-10-15 (Released:2009-09-19)
参考文献数: 29
被引用文献数: 1 1

In this article, the basic principle of photoacoustic microscope (PAM) and imaging was introduced paying the special attention to its detection schemes. The experimental apparatus and applications of PAM were reviewed. Depth profiling using PAM in the nondestructive inspection of semiconductor device was discussed. The principle of spectroscopic analysis method by integration over PAM image measured with respect chemical reagent concentraion or pollen number was also discussed. Furthermore, photoacoustic imaging technique including photoacoustic tomography applied to biological imaging was reviewed.

2017-06-14 13:19:35
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2 0 0 0 OA 非線形光学効果による広帯域波長可変テラヘルツ電磁波放射

著者: 谷内哲夫四方潤一伊藤弘昌
出版者: 一般社団法人レーザー学会
雑誌: レーザー研究 (ISSN:03870200)
巻号頁・発行日: vol.30, no.7, pp.365-369, 2002-07-15 (Released:2009-10-21)
参考文献数: 20

A coherent terahertz (THz) wave can be generated by difference frequency generation (DFG) using nonlinear optical crystals. DFG has a potential advantage of wide tunability achieved by a proper selection of the DFG crystal and input wavelengths. In this paper, we present the latest progress in widely tunable THz-wave generation from 0.3 to 6.5 THz using DAST crystals. As a dual-wavelength light source for DFG, we employed a KTP optical parametric oscillator in the 1100-1200 nm range pumped at 532 nm. Using a thick DAST crystal more than 1 mm, maximun THz-frequency was limited to 0.6 THz. However, using thin DAST crystals less than 0.3 mm, a peak power of more than 10 mW were successfully generated at 2.5 and 4.3 THz. In spite of the present nanosecond-pulse operation, a compact system of widely tunable THz-waves, including a diode-pumped Q switched Nd:YAG laser and a pyroelectric detector, could be useful in THz-imaging and spectroscopic applications.

2017-01-26 16:53:09
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2 0 0 0 OA ヒートパイプを用いた内部鏡型He-Neレーザーの安定化

著者: 佐々木彰加藤公敏伊藤卓郎
出版者: 一般社団法人レーザー学会
雑誌: レーザー研究 (ISSN:03870200)
巻号頁・発行日: vol.15, no.2, pp.98-105, 1987-02-28 (Released:2010-02-26)
参考文献数: 13

An internal-mirror He-Ne (λ=633 nm) laser tube is mounted in a duralumin box which is thermally connected to other box attached thermo-elements, via heat pipes. The output power and the frequency of the laser are stabilized by two simple method. First, the total back beam intensity detected with a silicon photodiode is fed to a heater wound around the laser tube. The output stability of±0.15% and the frequency stability of ±1.3×10-8 are obtained over a period of 10 min or longer. Second, the laser tube temperature detected with a thermistor is fed to a heater. The output stability of ×0.3% and the frequency stability of ±4.5×10-8 are obtained over a period of 10 min or longer. This method does not use the laser beam intensity, thus the optical-feedback effect does not affect the laser stabilization.

2017-01-04 02:36:07
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2 0 0 0 ホログラム作成の実際

著者: 西原浩
出版者: The Laser Society of Japan
雑誌: レーザー研究 (ISSN:03870200)
巻号頁・発行日: vol.3, no.4, pp.244-248, 1976

2016-10-21 00:36:14
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2 0 0 0 OA 3次元多層ビット記録型光メモリ

著者: 田中拓男河田聡
出版者: 一般社団法人レーザー学会
雑誌: レーザー研究 (ISSN:03870200)
巻号頁・発行日: vol.32, no.1, pp.11-16, 2004 (Released:2006-03-17)
参考文献数: 20

Three-dimensional multi-layered optical storage is one of the most promising methods that break the limitation of recording density in optical storage. It stores the bit information onto the multilayered recording planes inside the thick recording medium and realizes the tremendous large recording capacity. This paper describes the recording/reading principles, the systems, and the materials suitable for three-dimensional multi-layered memory. We also present the experimental results that using photochromic organic materials and rhodamine-B-doped and Au(III)-doped PMMA for recording medium.

2008-02-10 11:52:35
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1 0 0 0 OA 眼科におけるレーザー治療の最新事情

著者: 上野登輝夫
出版者: 一般社団法人レーザー学会
雑誌: レーザー研究 (ISSN:03870200)
巻号頁・発行日: vol.39, no.2, pp.85-89, 2011-02-15 (Released:2015-09-03)
参考文献数: 15

Since their invention, lasers have been put to use in a variety of ophthalmic treatment. In addition to

2023-11-13 09:10:16
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1 0 0 0 OA アト秒ナノ光学:光周波数エレクトロニクスへの展望

著者: 樋口卓也
出版者: 一般社団法人レーザー学会
雑誌: レーザー研究 (ISSN:03870200)
巻号頁・発行日: vol.45, no.4, pp.221, 2017 (Released:2020-12-17)
参考文献数: 20

When the electric field of light becomes comparable to or larger than the internal fields experienced by electrons in matter, the electron dynamics are then governed by optical-field-driven processes. By combining ultrashort laser pulses and the optical field enhancement at the surface of metallic nanostructures, such high-field strengths can be reached with moderate laser powers and without damaging the structures. Moreover, photoelectrons emitted from the surface under such intense optical fields with ultrashort durations are temporally and spatially well confined. Additionally, these electrons have been shown to be sensitive to the optical field waveform, underscoring the possibilities to control electron on a sub-optical, attosecond timescale. This review provides an overview of these strong-field-driven attosecond electron dynamics at nanostructures, extending its future ramifications as a key ingredient for light-field electronics, whose operation bandwidth may reach the petarahertz frequency range.