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Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722968014
Category :
Languages : en
Pages : 162
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Book Description
The topics covered include the following: (1) CO2 laser kinetics modeling; (2) gas lifetimes in pulsed CO2 lasers; (3) frequency chirp and laser pulse spectral analysis; (4) LAWS A' Design Study; and (5) discharge circuit components for LAWS. The appendices include LAWS Memos, computer modeling of pulsed CO2 lasers for lidar applications, discharge circuit considerations for pulsed CO2 lidars, and presentation made at the Code RC Review. Johnson, Barry Unspecified Center ATMOSPHERIC SOUNDING; CARBON DIOXIDE LASERS; KINETICS; LASER APPLICATIONS; MATHEMATICAL MODELS; OPTICAL RADAR; PULSED LASERS; RADAR MEASUREMENT; SPECTRUM ANALYSIS; WIND MEASUREMENT; CHIRP; CIRCUITS; COMPUTERIZED SIMULATION...
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722968014
Category :
Languages : en
Pages : 162
Get Book Here
Book Description
The topics covered include the following: (1) CO2 laser kinetics modeling; (2) gas lifetimes in pulsed CO2 lasers; (3) frequency chirp and laser pulse spectral analysis; (4) LAWS A' Design Study; and (5) discharge circuit components for LAWS. The appendices include LAWS Memos, computer modeling of pulsed CO2 lasers for lidar applications, discharge circuit considerations for pulsed CO2 lidars, and presentation made at the Code RC Review. Johnson, Barry Unspecified Center ATMOSPHERIC SOUNDING; CARBON DIOXIDE LASERS; KINETICS; LASER APPLICATIONS; MATHEMATICAL MODELS; OPTICAL RADAR; PULSED LASERS; RADAR MEASUREMENT; SPECTRUM ANALYSIS; WIND MEASUREMENT; CHIRP; CIRCUITS; COMPUTERIZED SIMULATION...
Author: Kenneth Smith
Publisher: Springer Science & Business Media
ISBN: 1475706413
Category : Science
Languages : en
Pages : 427
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Book Description
Author: Mohamed Salem Elgwaily
Publisher:
ISBN:
Category : Carbon dioxide lasers
Languages : en
Pages : 606
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Author:
Publisher:
ISBN:
Category : Lasers
Languages : en
Pages : 370
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Author: Mark Steven Csele
Publisher: CRC Press
ISBN: 1466582510
Category : Technology & Engineering
Languages : en
Pages : 274
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Book Description
Offering a fresh take on laser engineering, Laser Modeling: A Numerical Approach with Algebra and Calculus presents algebraic models and traditional calculus-based methods in tandem to make concepts easier to digest and apply in the real world. Each technique is introduced alongside a practical, solved example based on a commercial laser. Assuming some knowledge of the nature of light, emission of radiation, and basic atomic physics, the text: Explains how to formulate an accurate gain threshold equation as well as determine small-signal gain Discusses gain saturation and introduces a novel pass-by-pass model for rapid implementation of "what if?" scenarios Outlines the calculus-based Rigrod approach in a simplified manner to aid in comprehension Considers thermal effects on solid-state lasers and other lasers with new and efficient quasi-three-level materials Demonstrates how the convolution method is used to predict the effect of temperature drift on a DPSS system Describes the technique and technology of Q-switching and provides a simple model for predicting output power Addresses non-linear optics and supplies a simple model for calculating optimal crystal length Examines common laser systems, answering basic design questions and summarizing parameters Includes downloadable Microsoft® ExcelTM spreadsheets, allowing models to be customized for specific lasers Don’t let the mathematical rigor of solutions get in the way of understanding the concepts. Laser Modeling: A Numerical Approach with Algebra and Calculus covers laser theory in an accessible way that can be applied immediately, and numerically, to real laser systems.
Author: Saad Ahmad
Publisher:
ISBN:
Category :
Languages : en
Pages : 168
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Book Description
Abstract: RF excited CO2 lasers are widely used in industry. They provide relatively high power discharge levels while maintaining compactness, simplicity, and durability with respect to other competing laser technologies. To attain high power levels in the range of 5-10 KW, lasers with large electrode areas have to be designed. Unfortunately, due to the large electrode length requirements, transmission line effects make the discharge loading nonlinear, adversely affecting the efficiency of the CO2 laser. A standard approach to linearize the discharge loading is to introduce shunt inductors across the length of the electrodes in an effort to counter the capacitive nature of the discharge behavior. This thesis investigates and improves the theoretical models found in the literature in an effort to predict the discharge non-uniformity and allow for multiple shunt inductors installation. Specifically, we discuss the coupling of a CO2 laser discharge model with an electrical circuit solving scheme and how it can be characterized as one dimensional (1-D) and two dimensional (2-D) systems. The 1-D system is modeled using transmission line (TL) theory, where as the 2-D system is modeled using a finite difference time domain (FDTD) scheme. All our models were implemented in standard MATLAB code and the results are compared with those found in the literature with the goal to analyze and ascertain model limitations.
Author: Alvin D. Schnurr
Publisher: American Society of Civil Engineers
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 376
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: John Michael Dowden
Publisher: CRC Press
ISBN: 1040097006
Category : Science
Languages : en
Pages : 275
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Book Description
The Mathematics of Thermal Modeling, Second Edition, provides an introduction to the basics of the mathematics and physics needed to understand and use the physical principles employed in constructing models of a number of aspects of thermal modeling in industrial processes, notably laser welding; most of the techniques are applicable to many other technological processes, however. The book demonstrates how insight can be gained from mathematical enquiry at a simple level and helps workers understand the way in which more sophisticated models can be constructed. Some necessary but less familiar mathematical techniques are explained in greater detail than before and some discussion of wave-like features in welds is now included. An understanding will be gained of the importance of studying the interaction of multiple features. The book is equally suitable for engineers and material scientists at the Master's or first-year PhD level at university, to similar students with a background in mathematics or physics who are new to laser or industrial technology, or for research workers coming to mathematical modeling of industrial thermal processes for the first time, whatever stage they have reached in their career development.
Author: Hua Knuo Hwang
Publisher:
ISBN:
Category : Plasma (Ionized gases)
Languages : en
Pages : 121
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Book Description
