Propagation of sinusoidal pulse laser beam in a plasma channel

2007 ◽  
Vol 14 (11) ◽  
pp. 113105 ◽  
Author(s):  
Ajay K. Upadhyay ◽  
Gaurav Raj ◽  
Rohit K. Mishra ◽  
Pallavi Jha
Keyword(s):  
Laser Beam ◽  
Pulse Laser ◽  
Plasma Channel ◽  
Pulse Laser Beam

Allowable propagation of short pulse laser beam in a plasma channel and electromagnetic solitary waves

2011 ◽  
Vol 375 (45) ◽  
pp. 4022-4028 ◽  
Author(s):  
Shan Zhang ◽  
Xue-Ren Hong ◽  
Hong-Yu Wang ◽  
Bai-Song Xie
Keyword(s):  
Laser Beam ◽  
Pulse Laser ◽  
Solitary Waves ◽  
Plasma Channel ◽  
Short Pulse ◽  
Pulse Laser Beam ◽  
Short Pulse Laser

Evaluation of the Thermal Shock Fatigue Resistance of Cutting Tools Using a CO2 Pulse Laser Beam

2016 ◽  
Vol 719 ◽  
pp. 109-113
Author(s):  
Kenji Yamaguchi ◽  
Itaru Matsumoto ◽  
Tsuyoshi Fujita ◽  
Yasuo Kondo ◽  
Satoshi Sakamoto ◽  
...  
Keyword(s):  
Laser Beam ◽  
Thermal Shock ◽  
Pulse Laser ◽  
Fatigue Resistance ◽  
High Speed ◽  
Evaluation Method ◽  
Cutting Tools ◽  
Pulse Laser Beam ◽  
Intermittent Cutting ◽  
Thermal Shocks

It is well-known that a series of cracks sometimes gets initiated perpendicular to the cutting edges on the rake faces of brittle cutting tools made of materials such as cemented carbide, ceramics, and cermet under high-speed intermittent cutting. The tools used in intermittent cutting processes are exposed to elevated temperatures during cutting and then cool quickly during the noncutting time. Previous studies have suggested that such repeated thermal shocks generate thermal stress in the tool and that the thermal cracks are then propagated by thermal fatigue. Recently, high-speed machining techniques have attracted the attention of researchers. To apply new cutting tool materials to this machining process, it is important to evaluate their thermal shock fatigue resistances. During high-speed intermittent cutting, the frequency of thermal shocks becomes high and the action area of the thermal shocks is limited to the rake face of the tool. Therefore, conventional thermal shock resistance evaluation methods are unsuitable for this case. Consequently, the authors have developed a new experimental evaluation method using a CO2 laser beam. In this study, we irradiated cemented carbide and TiN cermet cutting tools with the CO2 pulse laser beam and gauged the effectiveness of the proposed thermal shock fatigue resistance evaluation method. The results show a correlation between the thermal shock due to the CO2 pulse laser beam and those due to the intermittent cutting experiments.

Optical Tweezers with Assistance of Sub-Microsecond-Duration Pulse Laser Beam

2012 ◽  
Vol 5 (4) ◽  
pp. 042701 ◽  
Author(s):  
Saki Maeda ◽  
Tadao Sugiura ◽  
Kotaro Minato
Keyword(s):  
Laser Beam ◽  
Optical Tweezers ◽  
Pulse Laser ◽  
Pulse Laser Beam

scholarly journals STUDY OF FOCUSING INTO CLOSELY SPACED SPOTS VIA ILLUMINATING A DIFFRACTIVE OPTICAL ELEMENT BY A SHORT-PULSE LASER BEAM

2015 ◽  
Vol 39 (2) ◽  
pp. 187-196 ◽  
Author(s):  
S. N. Khonina ◽  
S. A. Degtyarev ◽  
A. P. Porfirev ◽  
O. Yu. Moiseev ◽  
S. D. Poletaev ◽  
...  
Keyword(s):  
Laser Beam ◽  
Pulse Laser ◽  
Short Pulse ◽  
Optical Element ◽  
Diffractive Optical Element ◽  
Pulse Laser Beam ◽  
Short Pulse Laser
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