Steady-State and Transient Raman Gain Coefficients of Semiconductor Magneto-plasmas (Calculated for n-InSb-CO2 Laser System)

2022 ◽  
Author(s):  
Gopal ◽  
B. S. Sharma ◽  
Jaivir Singh ◽  
Manjeet Singh
Keyword(s):  
Steady State ◽  
Co2 Laser ◽  
Laser System ◽  
Raman Gain

Enhanced Raman gain coefficients (under steady-state and transient regimes) of semiconductor magnetoplasmas

Pramana ◽  
2021 ◽  
Vol 95 (4) ◽  
Author(s):  
Jaivir Singh ◽  
Sunita Dahiya ◽  
Manjeet Singh
Keyword(s):  
Steady State ◽  
Raman Gain ◽  
Transient Regimes

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

Steady-state Raman gain in visible and near-infrared waveband of SrWO4 and BaWO4 crystals

2014 ◽  
Vol 12 (12) ◽  
pp. 121902-121904 ◽  
Author(s):  
Fang Zhang Fang Zhang ◽  
Qinghua Zhang Qinghua Zhang ◽  
Bo Wang Bo Wang ◽  
Dawei Hu Dawei Hu ◽  
Haohai Yu Haohai Yu ◽  
...  
Keyword(s):  
Steady State ◽  
Near Infrared ◽  
Raman Gain

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

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

EFFECTS OF CORRELATED NOISES IN A SATURATION LASER MODEL

2006 ◽  
Vol 20 (23) ◽  
pp. 1481-1488 ◽  
Author(s):  
P. ZHU ◽  
S. B. CHEN ◽  
D. C. MEI
Keyword(s):  
Steady State ◽  
Intensity Fluctuation ◽  
Laser System ◽  
Planck Equation ◽  
Steady State Probability ◽  
Multiplicative Noises ◽  
Analytic Expressions ◽  
Laser Model ◽  
Correlation Strength ◽  
Correlated Noises

The effects of correlations between additive and multiplicative noises in a saturation laser model are investigated. The approximative Fokker–Planck equation and analytic expressions of the steady-state probability distribution function (SPD) of the laser system are derived. Based on the SPD, the normalized mean, the normalized variance, and the normalized skewness of the steady-state laser intensity are calculated numerically. Our results indicate that: (i) For the laser being operated above threshold, the correlation strength λ reduces the intensity fluctuation; (ii) For the laser being operated near threshold and below threshold, the correlation strength λ enhances the intensity fluctuation.

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.

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