Modification of electrical properties of zinc oxide by continuous wave ytterbium fiber laser irradiation

2011 ◽  
Vol 18 (7) ◽  
pp. 072014 ◽  
Author(s):  
H Kido ◽  
M Takahashi ◽  
J Tani ◽  
N Abe ◽  
M Tsukamoto
Keyword(s):  
Zinc Oxide ◽  
Electrical Properties ◽  
Fiber Laser ◽  
Laser Irradiation ◽  
Continuous Wave

scholarly journals Modification of electrical properties of TiO2 by continuous-wave ytterbium fiber laser irradiation

2014 ◽  
Vol 122 (1421) ◽  
pp. 21-24 ◽  
Author(s):  
Hiroyasu KIDO ◽  
Masanari TAKAHASHI ◽  
Jun-ichi TANI ◽  
Masaya CHIGANE ◽  
Nobuyuki ABE ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Fiber Laser ◽  
Laser Irradiation ◽  
Continuous Wave

scholarly journals High-Speed Micro-Grooving of Metal by Angled Irradiation of Single-Mode CW Fiber Laser

2020 ◽  
Vol 10 (23) ◽  
pp. 8333
Author(s):  
Tatsuhiko Sakai ◽  
Yasuhiro Okamoto ◽  
Chie Katayama ◽  
Hirofumi Imai ◽  
Akira Okada
Keyword(s):  
Laser Beam ◽  
Fiber Laser ◽  
Laser Irradiation ◽  
Thermophysical Properties ◽  
High Speed ◽  
Continuous Wave ◽  
Incident Angle ◽  
Single Mode ◽  
Deep Groove ◽  
Micro Grooving

Laser micro-grooving has excellent potential to improve the surface properties of metals. In this study, high-speed micro-grooving of the surfaces of mild steel SS400 and aluminum alloy A1050 was investigated using a single-mode continuous-wave fiber laser with an average power of 200 W. Experiments were conducted at laser beam scanning speeds of 1 to 6 m/s. The incident angle of the laser beam in the plane perpendicular to the scanning axis was varied from 0 to 60°. A relatively deep groove (approximately 30 µm in depth) and a high upheaval (10 µm in height) were formed along the scanning line at an incident angle of 45° on the SS400, whereas only shallow grooves were formed on A1050. The micro-groove formation mechanism was discussed on the basis of high-speed camera observation, groove shapes, and the thermophysical properties of the metal. Asymmetric molten metal flow and solidification around the keyhole are thought to play important roles in micro-groove formation. Although the laser irradiation conditions must be optimized according to the thermophysical properties of the material, angled laser irradiation has the potential to effectively form micro-grooves.

Research on Multi-Walled Carbon Nanotubes by Fiber Laser Irradiation

2014 ◽  
Vol 609-610 ◽  
pp. 382-387 ◽  
Author(s):  
Quan Shuang Su ◽  
Ji Min Chen ◽  
Fu Rong Liu
Keyword(s):  
Carbon Nanotubes ◽  
Fiber Laser ◽  
Laser Irradiation ◽  
Continuous Wave ◽  
Irradiation Time ◽  
Diameter Ratio ◽  
Sem Image ◽  
Transmission Electron ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

In this paper we report Multi-walled carbon nanotubes (MWCNTs) have been joined together by continuous wave fiber laser operating at 1064 nm. The SEM image clearly shows that there are obvious melting - solidified phenomenon between the jointed Multi-walled carbon nanotubes. MWCNTs wall was complete and smooth without destruction phenomenon. The new graphite layers were found in the connection with transmission electron microscopy (TEM). Besides, we observed that the present multi-walled carbon nanotubes showed the trend of melting connecting to destruction as the laser irradiation time increased in the case of a certain power density. In the end, there were recrystallization phenomena during MWCNTs joining with the Raman spectra. The crystallinity and length to diameter ratio decreased following the increasing irradiation time.

scholarly journals Laser patterning of thermoelectric iron silicide on alumina substrates by continuous-wave ytterbium fiber laser irradiation

2014 ◽  
Vol 122 (1429) ◽  
pp. 802-805 ◽  
Author(s):  
Hiroyasu KIDO ◽  
Masanari TAKAHASHI ◽  
Jun-ichi TANI ◽  
Yoshinori SAWAIRI ◽  
Mitsunobu IWASAKI
Keyword(s):  
Fiber Laser ◽  
Laser Irradiation ◽  
Continuous Wave ◽  
Iron Silicide ◽  
Laser Patterning

The Influence of Laser Irradiation and Ultrasound on the Structure, Surface Condition and Electrical Properties of TiS2/C Composites

2018 ◽  
Vol 10 (2) ◽  
pp. 02016-1-02016-5
Author(s):  
I. M. Budzulyak ◽  
◽  
L. S. Yablon ◽  
R. V. Ilnytskyi ◽  
O. V. Morushko ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Laser Irradiation ◽  
Surface Condition ◽  
Structure Surface

Switchable generation of multi-wavelength continuous wave and square-wave pluses in a bidirectional Erbium-doped fiber laser

2021 ◽  
Vol 143 ◽  
pp. 107302
Author(s):  
Wenxiang Cui ◽  
Xuefang Zhou ◽  
Meihua Bi ◽  
Guowei Yang ◽  
Miao Hu ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Continuous Wave ◽  
Square Wave ◽  
Erbium Doped ◽  
Multi Wavelength
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