High power picosecond CO2 laser system for ATF electron accelerator project

1992 ◽  
Author(s):  
I. Pogorelsky
Keyword(s):  
Co2 Laser ◽  
High Power ◽  
Electron Accelerator ◽  
Laser System

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.

Coco II — a dual beam high power CO2 laser system

1976 ◽  
Vol 18 (1) ◽  
pp. 168-169 ◽  
Author(s):  
M.C. Richardson ◽  
N.H. Burnett ◽  
G. Enright ◽  
P. Burtyn ◽  
K. Leopold
Keyword(s):  
Co2 Laser ◽  
High Power ◽  
Laser System ◽  
Dual Beam

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

Developments of high power co2 laser system “lekko” for laser fusion research

1982 ◽  
Vol 102 (1) ◽  
pp. 124-131
Author(s):  
Masafumi Matoba ◽  
Hisanori Fujita ◽  
Sadao Nakai ◽  
Chiyoe Yamanaka
Keyword(s):  
Co2 Laser ◽  
High Power ◽  
Laser System ◽  
Laser Fusion ◽  
Fusion Research

Compact high power Raman laser system using phase-modulated sidebands amplified by a single tapered amplifier

CPEM 2010 ◽  
2010 ◽  
Author(s):  
K. S. Lee ◽  
S. E. Park ◽  
T. Y. Kwon ◽  
S. B. Lee ◽  
J. Kim
Keyword(s):  
High Power ◽  
Laser System ◽  
Raman Laser
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