Fast Pulse Transformers In Laser Pulse Power Circuits

Study of Q Switch Laser Pulse Power Test

Applied laser ◽

10.3788/al20143404.0337 ◽

2014 ◽

Vol 34 (4) ◽

pp. 337-340

Author(s):

叶岳顺 Ye Yueshun ◽

申高 Shen Gao ◽

郑建 Zheng Jian

Keyword(s):

Laser Pulse ◽

Pulse Power ◽

Power Test ◽

Laser Pulse Power

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Laser pulse power transmission limits of silica fibers with antireflective coating

10.1117/12.590374 ◽

2005 ◽

Author(s):

St. Meister ◽

A. Wosniok ◽

G. Seewald ◽

Ch. Scharfenorth ◽

H. J. Eichler

Keyword(s):

Laser Pulse ◽

Power Transmission ◽

Pulse Power ◽

Antireflective Coating ◽

Silica Fibers ◽

Transmission Limits ◽

Laser Pulse Power

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The Influence of Laser Alloying of Ti13Nb13Zr on Surface Topography and Properties

Advances in Materials Science ◽

10.2478/adms-2019-0004 ◽

2019 ◽

Vol 19 (1) ◽

pp. 44-56 ◽

Cited By ~ 6

Author(s):

P. Tęczar ◽

B. Majkowska-Marzec ◽

M. Bartmański

Keyword(s):

Mechanical Properties ◽

Laser Pulse ◽

Surface Topography ◽

Young’S Modulus ◽

Laser Treatment ◽

Young's Modulus ◽

Pulse Power ◽

Laser Alloying ◽

Lower Power ◽

Laser Pulse Power

AbstractThe laser alloying is a continually developing surface treatment because of its significant and specific structuration of a surface. In particular, it is applied for Ti alloys, being now the most essential biomaterials’ group for load-bearing implants. The present research was performed on the Ti13Nb13Zr alloy subject to laser modification in order to determine the treatment effects on surface topography and its some mechanical properties like nanohardness, Young’s modulus, roughness. A pulse laser Nd:YAG was applied at three different laser pulse regimes: either 700 W, 1000 W or 1000 W treatment followed by 700 W modification at a pulse duration of 1 ms. The surface topography and morphology were examined using light microscopy and scanning electron microscopy with spectroscope of X-ray energy dispersion. The mechanical properties were determined by nanoindentation tests and surface roughness with a use of profilograph. The wettability was tested with a goniometer. The obtained results demonstrate complex behavior of the material surface: decrease in penetration distance and increase in hardness after first laser treatment, maintenance of this trend when machining using a higher laser pulse power, followed by an increase in penetration and decrease in hardness after additional laser treatment at lower power input, due to which a surface with fewer defects is obtained. The change in Young’s modulus follows the change in other mechanical properties, but not a change in roughness. Therefore, the observed hardening with the increase of the laser pulse power and then a small softening with the use of additional treatment with lower power can be attributed to some processes of remelting, diffusion and crystallization, sensitive to the previous surface state and heat energy flux. Despite that, the laser treatment always caused a significant hardening of the surface layer.

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Controlling single-wall nanotube diameters with variation in laser pulse power

Chemical Physics Letters ◽

10.1016/s0009-2614(99)01259-2 ◽

2000 ◽

Vol 316 (1-2) ◽

pp. 13-18 ◽

Cited By ~ 70

Author(s):

A.C. Dillon ◽

P.A. Parilla ◽

J.L. Alleman ◽

J.D. Perkins ◽

M.J. Heben

Keyword(s):

Laser Pulse ◽

Pulse Power ◽

Laser Pulse Power

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Study of Q Switch Laser Pulse Power Test

Applied laser ◽

10.3788/al20143404.337 ◽

2014 ◽

Vol 34 (4) ◽

pp. 337-340

Author(s):

叶岳顺 Ye Yueshun ◽

申高 Shen Gao ◽

郑建 Zheng Jian

Keyword(s):

Laser Pulse ◽

Pulse Power ◽

Power Test ◽

Laser Pulse Power

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Extended search for sub-eV axion-like resonances via four-wave mixing with a quasi-parallel laser collider in a high-quality vacuum system

Progress of Theoretical and Experimental Physics ◽

10.1093/ptep/ptaa075 ◽

2020 ◽

Vol 2020 (7) ◽

Author(s):

Akihide Nobuhiro ◽

Yusuke Hirahara ◽

Kensuke Homma ◽

Yuri Kirita ◽

Takaya Ozaki ◽

...

Keyword(s):

Laser Pulse ◽

Mass Range ◽

Four Wave Mixing ◽

Pulse Power ◽

Vacuum System ◽

Mass Relation ◽

Wave Mixing ◽

High Quality ◽

Optical Components ◽

Background Photon

Abstract Resonance states of axion-like particles were searched for via four-wave mixing by focusing two-color pulsed lasers into a quasi-vacuum. A quasi-parallel collision system that allows probing of the sub-eV mass range was realized by focusing the combined laser fields with an off-axis parabolic mirror. A 0.10 mJ/34 fs Ti:sapphire laser pulse and a 0.14 mJ/9 ns Nd:YAG laser pulse were spatiotemporally synchronized by sharing a common optical axis and focused into the vacuum system. No significant four-wave mixing signal was observed at the vacuum pressure of $3.7 \times 10^{-5}$ Pa, thereby providing upper bounds on the coupling-mass relation by assuming exchanges of scalar and pseudoscalar fields at a 95% confidence level in the mass range below 0.21 eV. For this search, the experimental setup was substantially upgraded so that the optical components were compatible with the requirements of the high-quality vacuum system, hence enabling the pulse power to be increased. With the increased pulse power, a new kind of pressure-dependent background photon emerged in addition to the known atomic four-wave mixing process. This paper shows the pressure dependence of these background photons and how to handle them in the search.

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