CO2 laser system for velocity measurement

1992 ◽  
Vol 35 (8) ◽  
pp. 941-942
Author(s):  
L. N. Asnis ◽  
A. V. Glukhov ◽  
V. V. Palagin ◽  
S. A. Remizov
Keyword(s):  
Co2 Laser ◽  
Velocity Measurement ◽  
Laser System

Active Heterodyne Spectrometry with an Airborne CO2 Laser System

1978 ◽  
pp. 171-182 ◽  
Author(s):  
W. Wiesemann ◽  
W. Englisch ◽  
J. Boscher ◽  
G. Schäfer
Keyword(s):  
Co2 Laser ◽  
Laser System

Microstructure fabrication with a CO2 laser system

2003 ◽  
Vol 14 (2) ◽  
pp. 182-189 ◽  
Author(s):  
Detlef Snakenborg ◽  
Henning Klank ◽  
Jörg P Kutter
Keyword(s):  
Co2 Laser ◽  
Laser System ◽  
Microstructure Fabrication

A remote laser system for ultrasonic velocity measurement at high temperatures

1988 ◽  
Vol 63 (4) ◽  
pp. 1225-1227 ◽  
Author(s):  
R. J. Dewhurst ◽  
C. Edwards ◽  
A. D. W. McKie ◽  
S. B. Palmer
Keyword(s):  
Ultrasonic Velocity ◽  
High Temperatures ◽  
Velocity Measurement ◽  
Laser System

Flexible CO2 laser system for fundamental research related to an extreme ultraviolet lithography source

2009 ◽  
Vol 80 (12) ◽  
pp. 123503 ◽  
Author(s):  
Y. Tao ◽  
M. S. Tillack ◽  
N. Amin ◽  
R. A. Burdt ◽  
S. Yuspeh ◽  
...  
Keyword(s):  
Co2 Laser ◽  
Extreme Ultraviolet ◽  
Laser System ◽  
Extreme Ultraviolet Lithography ◽  
Ultraviolet Lithography ◽  
Fundamental Research

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.

Use of the Photonic Band Gap Fiber Assembly CO2 Laser System in Head and Neck Surgical Oncology

2006 ◽  
Vol 116 (7) ◽  
pp. 1288-1290 ◽  
Author(s):  
F Christopher Holsinger ◽  
Christopher N. Prichard ◽  
Gil Shapira ◽  
Ori Weisberg ◽  
David S. Torres ◽  
...  
Keyword(s):  
Head And Neck ◽  
Band Gap ◽  
Co2 Laser ◽  
Photonic Band Gap ◽  
Laser System ◽  
Surgical Oncology ◽  
Fiber Assembly ◽  
Photonic Band

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.

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