著者
黒田 和男
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.6, pp.390-394, 2011-06-15 (Released:2015-09-03)
参考文献数
21
被引用文献数
1

Speckle is observed when coherent light is scattered from a rough surface or is transmitted through a
著者
霜田 光一
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.25, no.7, pp.531-535, 1997-07-15 (Released:2010-02-26)
参考文献数
14
被引用文献数
1 1
著者
佐伯 拓 今崎 一夫 中塚 正大
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.2, pp.120-126, 2009-02-15 (Released:2015-08-04)
参考文献数
16
被引用文献数
1 2

The recent rapid progresses of the laser technologies make possible to convert from solar power to laser
著者
森田 逸郎 サンダー ヤンセン 高橋 英憲 アルアミン アブドゥッラー 田中 英明
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.3, pp.182-187, 2009-03-15 (Released:2015-08-04)
参考文献数
14

Orthogonal frequency division multiplexing (OFDM) is an attractive modulation format that recently
著者
市川 結 谷口 彬雄
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.9, pp.570-575, 2004-09-15 (Released:2010-01-12)
参考文献数
42

Recent, remarkable progress in organic semiconductor devices, typified by organic light-emitting diodes, has opened a door to the next type of organic device: the organic semiconductor laser. In this paper, we describe recent progress and future problems in research and development on organic semiconductor lasers.
著者
光木 文秋 陶山 翔大 池上 知顯 中宮 俊幸 園田 義人
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.5, pp.379-383, 2009-05-15 (Released:2015-08-04)
参考文献数
7
被引用文献数
1 2

We developed a new method to measure electric discharge sound using an optical wave microphone.
著者
多田 尚史 本越 伸二 本田 能之 實野 孝久 藤岡 加奈 吉田 実
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.5, pp.382-385, 2010-05-15 (Released:2015-08-08)
参考文献数
11

Since Ce:YAG materials have wide fluorescence spectra in the visible region, they are considered a
著者
中野 秀俊 石田 祐三
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.20, no.8, pp.631-637, 1992-08-29 (Released:2010-03-17)
参考文献数
15

Self-induced transparency (SIT) is a kind of coherent transient phenomena in two-level atomic system. The optical pulse with an area that is an integer multiple of 2π, which causes SIT in an absorber, is stable and a kind of soliton. Thus SIT is expected to be useful in pulse compression and pulse shaping. In this paper, we discuss some problems in experiments of SIT and surveys the experimental results of SIT. It is also described the recent experimental results of coherent nonlinear pulse propagation in BiI3 crystal using tunable sub-picosecond pulses.
著者
小松 光昭 松田 芳樹 石井 良夫 木暮 信一 渡辺 一弘
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.35, no.4, pp.252-258, 2007-04-15 (Released:2014-03-26)
参考文献数
22
被引用文献数
1 1

We examined the effects of Ar+ laser (457, 488, 514nm; 25, 50, 100mW) irradiation on the law of polar excitation using frog sciatic nerve. The law of polar excitation is well known, as both cathode-make-excitation (CE) and anode-break-excitation (AE) are elicited when nerves are extracellularly stimulated with a longer pulse at suprathreshold intensity. Compound action potentials (CAP) were suppressed by the laser irradiation. Furthermore, the existence of irradiation conditions (power, wavelength) for greatly suppressing AE in comparison with CE was demonstrated. Ar+ laser irradiation did not suppress conduction but did suppress generation of CAP. It seems possible that only AE generation is suppressed by local irradiation using the Ar+ laser. Since the contribution of Hyperpolarization-activated channels (Ih) to AE generation had been demonstrated and Ih expression is associated with intractable epilepsy, the present results suggest a novel LLLT for intractable epilepsy as an alternative to Ih blockers.
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
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.
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
2 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.
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
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.
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.
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.