Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722968014
Category :
Languages : en
Pages : 162
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...
Co2 Laser Modeling
Author: National Aeronautics and Space Administration (NASA)
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722968014
Category :
Languages : en
Pages : 162
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...
Publisher: Createspace Independent Publishing Platform
ISBN: 9781722968014
Category :
Languages : en
Pages : 162
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...
Computer Modeling of Gas Lasers
Author: Kenneth Smith
Publisher: Springer Science & Business Media
ISBN: 1475706413
Category : Science
Languages : en
Pages : 427
Book Description
Publisher: Springer Science & Business Media
ISBN: 1475706413
Category : Science
Languages : en
Pages : 427
Book Description
Design and Modeling of Te CW CO2 Laser
Author: Mohamed Salem Elgwaily
Publisher:
ISBN:
Category : Carbon dioxide lasers
Languages : en
Pages : 606
Book Description
Publisher:
ISBN:
Category : Carbon dioxide lasers
Languages : en
Pages : 606
Book Description
Modeling and Simulation of Laser Systems
Author:
Publisher:
ISBN:
Category : Lasers
Languages : en
Pages : 370
Book Description
Publisher:
ISBN:
Category : Lasers
Languages : en
Pages : 370
Book Description
Modeling the Discharge Loading of Radio Frequency Excited CO2 Slab Lasers
Author: Saad Ahmad
Publisher:
ISBN:
Category :
Languages : en
Pages : 168
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.
Publisher:
ISBN:
Category :
Languages : en
Pages : 168
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.
Laser Modeling
Author: Mark Steven Csele
Publisher: CRC Press
ISBN: 1466582510
Category : Technology & Engineering
Languages : en
Pages : 274
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.
Publisher: CRC Press
ISBN: 1466582510
Category : Technology & Engineering
Languages : en
Pages : 274
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.
Modeling and Simulation of Laser Systems II
Author: Alvin D. Schnurr
Publisher: American Society of Civil Engineers
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 376
Book Description
Publisher: American Society of Civil Engineers
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 376
Book Description
Modeling and Predicting of the Color Changes of Wood Surface During CO2 Laser Modification
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Theory and Simulation of Plasma Heating by CO2 Laser
Author: Hua Knuo Hwang
Publisher:
ISBN:
Category : Plasma (Ionized gases)
Languages : en
Pages : 121
Book Description
Publisher:
ISBN:
Category : Plasma (Ionized gases)
Languages : en
Pages : 121
Book Description
Numeric Model of a CO2 Laser Amplifier
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 83
Book Description
A carbon dioxide laser amplifier simulation model is developed for use on IBM-compatible personal computers. First, a general laser amplifier is modeled by dividing an amplifier into separate cells to model both the temporal and spatial dependence of the amplifier's gain. The resulting amplification is validated by comparison with a closed-form solution. Second, losses due to amplified spontaneous emissions (ASE) are investigated and included in the model. Equations for ASE losses consider both the solid angle of the emissions and the reflectivity of the cavity windows. Other reflections are ignored. Third, an existing numerical model of CO2 gas kinetics is incorporated. In this kinetics model, temperature-dependent terms are fixed according to initial conditions, and the rotational levels of the upper CO2 vibrational state are assumed to be in equilibrium. The user-friendly model allows designers and students to investigate the amplification of either square input pulses or pulses generated with a laser oscillator while varying several input parameters. Among the variable parameters are length, diameter, gas mix, temperature, pressure, window reflectivity, and pump efficiency. Theses. (aw).
Publisher:
ISBN:
Category :
Languages : en
Pages : 83
Book Description
A carbon dioxide laser amplifier simulation model is developed for use on IBM-compatible personal computers. First, a general laser amplifier is modeled by dividing an amplifier into separate cells to model both the temporal and spatial dependence of the amplifier's gain. The resulting amplification is validated by comparison with a closed-form solution. Second, losses due to amplified spontaneous emissions (ASE) are investigated and included in the model. Equations for ASE losses consider both the solid angle of the emissions and the reflectivity of the cavity windows. Other reflections are ignored. Third, an existing numerical model of CO2 gas kinetics is incorporated. In this kinetics model, temperature-dependent terms are fixed according to initial conditions, and the rotational levels of the upper CO2 vibrational state are assumed to be in equilibrium. The user-friendly model allows designers and students to investigate the amplification of either square input pulses or pulses generated with a laser oscillator while varying several input parameters. Among the variable parameters are length, diameter, gas mix, temperature, pressure, window reflectivity, and pump efficiency. Theses. (aw).