A high‐power, power‐modulated TEA CO2 laser system as a driving source of electrostatic plasma waves

1992 ◽  
Vol 63 (9) ◽  
pp. 4086-4091 ◽  
Author(s):  
Koichi Sasaki ◽  
Kouichi Takahashi ◽  
Takaharu Fujii ◽  
Masaaki Nagatsu ◽  
Takashige Tsukishima
Keyword(s):  
Co2 Laser ◽  
High Power ◽  
Laser System ◽  
Plasma Waves ◽  
Tea Co2 Laser ◽  
Driving Source ◽  
Electrostatic Plasma Waves

High power TEA CO2 laser tuned by a holographic grating

1983 ◽  
Vol 45 (2) ◽  
pp. 115-116 ◽  
Author(s):  
K.P. Francke ◽  
G. Korn ◽  
H. Albrecht ◽  
S. Polze
Keyword(s):  
Co2 Laser ◽  
High Power ◽  
Holographic Grating ◽  
Tea Co2 Laser

Acoustic Microscopy for Evaluating Cracks Produced by CO2 Laser Within Thin Alumina Plates

2003 ◽  
Author(s):  
Chiaki Miyasaka ◽  
Bernhard R. Tittmann
Keyword(s):  
Crack Initiation ◽  
Co2 Laser ◽  
High Power ◽  
Laser Scanning ◽  
Process Analysis ◽  
Laser System ◽  
Acoustic Microscopy ◽  
Manufacturing Method ◽  
Post Process ◽  
Micro Cracks

The laser shaping of thin alumina ceramic plates appears to be an advantageous manufacturing method. Unfortunately, the failure rate for using this technique is high because of crack initiation during the application of a high power laser. We address the issue of crack initiation with the use of in-process and post-process analysis. This article reports our results on the evaluation of the surface and interior cracks with optical, scanning laser, scanning electron and scanning acoustic microscopy. We present images of surface and subsurface micro-cracks generated at different power levels of a high power CO2 laser system. The spatial variation of the Rayleigh wave velocity is measured by the V(z) curve technique. These preliminary data suggest that, some with improvement, the V(z) technique may detect residual stress with high spatial resolution. The obtained results may contribute to the understanding of the fracture mechanism, and can eventually provide guidance for the choice of laser parameters (e.g., power, focus, scanning rate, emitting duration, or the like) in laser shaping apparatus.

A Dynamic Model for Condition Monitoring of a High-Power CO2 Industrial Laser

1999 ◽  
Vol 121 (2) ◽  
pp. 157-164 ◽  
Author(s):  
J. F. Tu ◽  
J. G. Katter ◽  
L. E. Monacelli ◽  
M. Gartner
Keyword(s):  
Co2 Laser ◽  
Laser Cooling ◽  
High Power ◽  
Power Distribution ◽  
Cooling System ◽  
Laser System ◽  
Operating Conditions ◽  
Distribution Model ◽  
Dynamic Features ◽  
Laser Systems

Industrial laser systems handle high power consumptions and may function under undesirable operating conditions if the systems are not properly maintained. It is sometimes difficult to diagnose why a laser is not functioning properly because the optical output is the result of complex interactions among many parameters such as the total gas pressure, effectiveness of the laser cooling system, operating environment, and gradual deterioration of laser components. In this paper, a dynamic power distribution model is developed to characterize the power distribution of a high-power transverse-flow DC-excited CO2 laser to account for dynamic effects such as continuously ramping up and down the laser output power and the cyclic nature of the chiller. The model contains the essential dynamic features of a CO2 laser system and yields solutions sufficiently accurate for practical diagnostic purposes.

Precise measurement for beam pointing stability of high power repetition rate TEA CO2 laser

Optik ◽  
2017 ◽  
Vol 131 ◽  
pp. 892-898 ◽  
Author(s):  
Kuo Zhang ◽  
Fei Chen ◽  
Guilong Yang ◽  
Dianjun Li ◽  
Jin Guo
Keyword(s):  
Co2 Laser ◽  
High Power ◽  
Repetition Rate ◽  
Precise Measurement ◽  
Tea Co2 Laser

Laser spectrum in 9R band of high power TEA CO2 laser

2018 ◽  
Vol 47 (7) ◽  
pp. 706001
Author(s):  
Shao Mingzhen ◽  
Xue Xiangyao ◽  
Zhang Wenbao ◽  
Wang Guang ◽  
Ma Yakun ◽  
...  
Keyword(s):  
Co2 Laser ◽  
High Power ◽  
Tea Co2 Laser ◽  
Laser Spectrum

High power TEA-CO2 laser induced polymerization of ethylene

1976 ◽  
Vol 54 (14) ◽  
pp. 2341-2342 ◽  
Author(s):  
S. L. Chin
Keyword(s):  
Co2 Laser ◽  
High Power ◽  
Room Temperature ◽  
Tea Co2 Laser ◽  
Polymerization Product

A 100-MW double-discharged TEA-CO2 laser was used to induce the polymerization of ethylene gas at pressures ranging from 250 to 900 psi at room temperature. The polymerization product was mainly tetradecane (CH3(CH2)12CH3) (∼80%) and octadecane (CH3(CH2)16CH3) (∼20%).

scholarly journals Development of a Power-Modulated TEA CO2 Laser System with Long Pulse Duration.

1992 ◽  
Vol 20 (7) ◽  
pp. 475-487
Author(s):  
Koichi SASAKI ◽  
Takashige TSUKISHIMA
Keyword(s):  
Pulse Duration ◽  
Co2 Laser ◽  
Laser System ◽  
Tea Co2 Laser ◽  
Long Pulse

scholarly journals Development of a High Power Mid-IR Source Using TEA CO2 Laser MOPA System with AgGaSe2 Crystals.

1997 ◽  
Vol 25 (1) ◽  
pp. 61-66 ◽  
Author(s):  
Jun SAKUMA ◽  
Toshie ITOH ◽  
Akiko HARASAKI ◽  
Toshio SATOH ◽  
Masakatsu SUGII
Keyword(s):  
Co2 Laser ◽  
High Power ◽  
Tea Co2 Laser
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