Laser Sources for Confocal Microscopy
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Book of Abstracts
Russian Academy of Sciences Institute of Problems of Chemical Physics RAS Joint Institute for High Temperatures RAS XIII International Conference on Physics of Non-Ideal Plasmas September 13 | 18, 2009, Chernogolovka, Russia Book of Abstracts Chernogolovka 2009 The book consists of the abstracts of oral and poster contributions to the XIII International Conference on Physics of Non-Ideal Plasmas (September 13 | 18, 2009, Chernogolovka, Russia). The Conference continues a tradi- tional series of meetings devoted to new theoretical and experimental results on the physics of dense non-ideal plasmas: Martzlow-Garwitz, 1980; Wus- trow, 1982; Biesenthal, 1984; Greifswald, 1986; Wustrow, 1988; Gosen, 1991; Markgrafenheide, 1993; Binz, 1995; Rostock, 1998; Greifswald, 2000; Valen- cia, 2003; Darmstadt, 2006. The following questions are covered: statistical physics and mathematical modeling (including simulation) of strongly cou- pled Coulomb systems, equilibrium properties and equation of state of dense plasmas, kinetics, transport and optical properties of dense Coulomb systems, dense hydrogen, laser and heavy-ion-produced plasmas, dense astrophysical plasmas, phase transitions in plasmas and fluids, dusty plasmas. The conference is held under financial support of the Russian Academy of Sciences, Russian Foundation for Basic Research (grant No. 09 { 02 { 06154Γ), and Dynasty Foundation. Contents 1 Statistical physics and mathematical modeling of strongly cou- pled Coulomb systems 16 1.1 Mathematical simulation of kinetic processes in the non-ideal nuclear-excited dust plasma of the noble gases Budnik A.P., Deputatova L.V., Fortov V.E., Kosarev V.A., Rykov V.A., Vladimirov V.I., JIHT RAS . 16 1.2 Diagnosics of dense plasmas via transport and optical proper- ties Reinholz H., Raitza T., R¨opke G., Wierling A., Winkel M., U. -
Micro-Cavity Fluidic Dye Lasers
Micro-Cavity Fluidic Dye Lasers M.Sc. Thesis Bjarne Helbo Student Number: c960336 Supervisors: Anders Kristensen and Aric Menon Mikroelektronik Centret (MIC) Technical University of Denmark (DTU) November 2002 Abstract i Abstract The work described in this masters thesis deals with development, fabrication, and optical characterization of micro-cavity fluidic dye lasers. The wide band fluorescence of organic dyes make them suitable as the active gain media for tunable dye lasers. Decreasing the laser cavity size down to the micron level makes dye lasers suitable for integration with existing bio/chemical microsystems. Theory for organic dyes is presented together with basic laser theory. The theory is used for explaining the behavior of the fabricated devices. Two types of micro-cavity fluidic dye laser devices were fabricated based on two dif- ferent micro-fabrication schemes. The devices were vertical emitting with fixed lasing wavelength. The initial device was a microfluidic channel defined with an KOH etch of silicon. The bottom (100) plane of the etched silicon channel was used as a deposition surface for a gold/chromium mirror. The etched surface was not smooth enough for mirror purpose and the following anodic bonding of a glass lid on the top made the surface even more rough. Due to thermal heating from the anodic bonding process the metals diffused into the silicon substrate and left the surface dull and rough, not suitable for optical mirrors. A cw argon ion laser (488 nm) was used for optical pumping of a Rhodamine 110 dye dissolved in ethanol, which was pumped through the microfluidic laser cavity. -
Solid State Laser
SOLID STATE LASER Edited by Amin H. Al-Khursan Solid State Laser Edited by Amin H. Al-Khursan Published by InTech Janeza Trdine 9, 51000 Rijeka, Croatia Copyright © 2012 InTech All chapters are Open Access distributed under the Creative Commons Attribution 3.0 license, which allows users to download, copy and build upon published articles even for commercial purposes, as long as the author and publisher are properly credited, which ensures maximum dissemination and a wider impact of our publications. After this work has been published by InTech, authors have the right to republish it, in whole or part, in any publication of which they are the author, and to make other personal use of the work. Any republication, referencing or personal use of the work must explicitly identify the original source. As for readers, this license allows users to download, copy and build upon published chapters even for commercial purposes, as long as the author and publisher are properly credited, which ensures maximum dissemination and a wider impact of our publications. Notice Statements and opinions expressed in the chapters are these of the individual contributors and not necessarily those of the editors or publisher. No responsibility is accepted for the accuracy of information contained in the published chapters. The publisher assumes no responsibility for any damage or injury to persons or property arising out of the use of any materials, instructions, methods or ideas contained in the book. Publishing Process Manager Iva Simcic Technical Editor Teodora Smiljanic Cover Designer InTech Design Team First published February, 2012 Printed in Croatia A free online edition of this book is available at www.intechopen.com Additional hard copies can be obtained from [email protected] Solid State Laser, Edited by Amin H. -
Part 2: Laser in Pulsed Operation
Part 2: Laser in pulsed operation 1 Theoretical principles 1.1 Generation of short laser pulses The output power of existing continuous wave laser systems is between a few milliwatts (He-Ne lasers) and a few hundred watts (Nd or CO2 lasers). However, there is a possibility to increase the output power of the laser for a small period of time by pulsed laser operation. Solid-state lasers are particularly suitable for this purpose, as they can achieve pulse peak output powers of up to 1012 W. This value corresponds approximately to the average electrical energy generation of the entire world. The difference, however, lies in the period in which this performance is achieved. While all the power plants together reach this value continuously, a single laser produces this high output power only for a duration of 10−13 s. In this case, the extremely short pulse duration appears to be disadvantageous, but there are also applications which exactly require this. One example is laser ablation, which is a method in material processing. Here, a small volume of material at the surface of a work piece can be evaporated if it is heated high enough in a very short amount of time. On the other hand, supplying the energy gradually would allow the heat to be absorbed into the bulk of the piece, never attaining a sufficiently high temperature above the evaporation point of the material. Other applications rely on the very high peak pulse power to obtain strong non-linear optical effects, like it is necessary for efficient second-harmonic generation or for optical parametric oscillators (OPO) which converts an input laser wave into two output waves of lower frequencies. -
A Laser (From the Acronym Light Amplification by Stimulated Emission of Radiation) Is an Optical Source That Emits Photons in a Coherent Beam
LASER A laser (from the acronym Light Amplification by Stimulated Emission of Radiation) is an optical source that emits photons in a coherent beam. The verb to lase means "to produce coherent light" or possibly "to cut or otherwise treat with coherent light", and is a back- formation of the term laser. Laser light is typically near-monochromatic, i.e. consisting of a single wavelength or color, and emitted in a narrow beam. This is in contrast to common light sources, such as the incandescent light bulb, which emit incoherent photons in almost all directions, usually over a wide spectrum of wavelengths. Laser action is explained by the theories of quantum mechanics and thermodynamics. Many materials have been found to have the required characteristics to form the laser gain medium needed to power a laser, and these have led to the invention of many types of lasers with different characteristics suitable for different applications. The laser was proposed as a variation of the maser principle in the late 1950's, and the first laser was demonstrated in 1960. Since that time, laser manufacturing has become a multi- billion dollar industry, and the laser has found applications in fields including science, industry, medicine, and consumer electronics. Contents [hide] 1 Physics 2 History 2.1 Recent innovations 3 Uses 3.1 Popular misconceptions 3.2 "LASER" 3.3 Scientific misconceptions 4 Laser safety 5 Categories 5.1 By type 5.2 By output power 6 See also 7 Further reading 7.1 Books 7.2 Periodicals 8 References 9 External links [edit] Physics See also: Laser science Principal components: 1. -
Amplified Spontaneous Emission Properties of Semiconducting Organic Materials
Int. J. Mol. Sci. 2010, 11, 2546-2565; doi:10.3390/ijms11062546 OPEN ACCESS International Journal of Molecular Sciences ISSN 1422-0067 http://www.mdpi.com/journal/ijms/ Review Amplified Spontaneous Emission Properties of Semiconducting Organic Materials Eva M. Calzado 1, Pedro G. Boj 2 and María A. Díaz-García 3,* 1 Departamento Física, Ingeniería de Sistemas y Teoría de la Señal and Instituto Universitario de Materiales de Alicante, Universidad de Alicante, Alicante-03080, Spain; E-Mail: [email protected] 2 Departamento Óptica and Instituto Universitario de Materiales de Alicante, Universidad de Alicante, Alicante-03080, Spain; E-Mail: [email protected] 3 Departamento Física Aplicada, Unidad asociada UA-CSIC and Instituto Universitario de Materiales de Alicante, Universidad de Alicante, Alicante-03080, Spain * Author to whom correspondence should be addressed; E-Mail: [email protected]; Tel.: +34-965903543; Fax: +34-965909726. Received: 7 May 2010 / Accepted: 10 June 2010 / Published: 18 June 2010 Abstract: This paper aims to review the recent advances achieved in the field of organic solid-state lasers with respect to the usage of semiconducting organic molecules and oligomers in the form of thin films as active laser media. We mainly focus on the work performed in the last few years by our research group. The amplified spontaneous emission (ASE) properties, by optical pump, of various types of molecules doped into polystyrene films in waveguide configuration, are described. The various systems investigated include N,N´-bis(3-methylphenyl)-N,N´-diphenylbenzidine (TPD), several perilenediimide derivatives (PDIs), as well as two oligo-phenylenevinylene derivatives. The ASE characteristics, i.e., threshold, emission wavelength, linewidth, and photostability are compared with that of other molecular materials investigated in the literature. -
Low Temperature Laser-Induced Selective Area Growth of Compound Semiconductor
LOW TEMPERATURE LASER-INDUCED SELECTIVE AREA GROWTH OF COMPOUND SEMICONDUCTOR SUDARSAN UPPILI B.Sc, Madurai University, 1981 B.E, Indian Institute of Science, 1984 A dissertation submitted to the faculty of the Oregon Graduate Institute of Science and Technology in partial fulfillment for the degree Doctor of Philosophy in Materials Science April, 1990 The dissertation "Low temperature laser-induced selective area growth of compound semiconductorsN by SUDARSAN UPPILI has been examined and approved by the following Examination Committee: Raj Solanki, Thesis Advisor ' Professor I William E. Wood, Thesis Advisor Professor -- - 1, Robert M. Drosd Adjunct Professor - - Kck H. Dedetian Professor I dedicate this dissertation to my father iii ACKNOWLEDGEMENTS I am most grateful to my advisors, Professors Raj Solanki and William E. Wood for encouraging me to undertake this research. Professor Solanki equipped me initially with a delight for laser chemical processing, then guided my research from start to finish. I owe to him a debt of gratitude much greater than I have paid. My appreciation goes to Professor Wood for allowing me to work on an inter-departmental project with Applied Physics and Electrical Engineering department. I enjoyed the discussions with Dr. Robert Drosd during the course of the work. 1 thank Professors Raj Solanki, William Wood, Jack Devletian, and Dr. Robert Drosd for serving on my examination committee. I appreciate very much the invaluble co-operation I recieved from Nyles Cody and Taner Dosloglou. I thank Devanathan, Parthasarathy, Rajesh Digde, Vivek Dikshit, and Ajay Chadda for their assistance during compiling of this dissertation. My special thanks goes to Devanathan for keeping a constant watch on my lunch time. -
CW Ndryag LASER Martin David Dawson, B.Sc
CHARACTERISATION AND APPLICATION OF A MODE-LOCKED (MODE-LOCKED/Q-SWITCHED) C.W. NdrYAG LASER Martin David Dawson, B.Sc., A.R.C.S. A Thesis submitted for the degree of Doctor of Philosophy of the University of London and for the Diploma of Membership of Imperial College Optics Group Blackett Laboratory Imperial College of Science and Technology M a r c h 1985 London SW7 2BZ DEDICATION To Mam, Dad and Pam ABSTRACT A synchronously operated (Synchroscan) picosecond streak camera has been used in a direct time-resolved study of laser emission from a GaAs/(GaAl)As double heterostructure laser pumped by 514-nm Ar ion laser pulses of duration close to the ^ 60ps Fourier-transform limit. Semiconductor laser pulsewidths as short as 20ps were recorded and the dependence of the temporal characteristics of these pulses on average pump power was investigated. Optical pulses of similar wavelength (532nm) to those obtained from the Ar ion laser, but having considerably shorter duration (^30ps), have been generated by frequency doubling the output of a mode-locked continuous wave (c.w.) Nd:YAG laser using Type II phase matching in a KTiOPOi* (K.T.P.) crystal. High doubling efficiencies (a.10/6 average power conversion) were achieved. These pulses have been used to synchronously pump a Rhodamine 6G jet-stream dye laser, whose performance is compared to its Ar ion 514nm-pumped counterpart. The mode-locked c.w. Nd:YAG laser itself has been thoroughly characterised and various changes made to improve the short and long term stability of the output. Simultaneous Q-switching of this laser at repetition rates ^ 1kHz, both with and without prelasing, has been investigated in detail using streak cameras. -
MASS SPECTROMETRY by Michal Kliman Dissertation Submi
ADVANCED STRUCTURAL AND SPATIAL ANALYSIS OF LIPIDS USING ION MOBILITY – MASS SPECTROMETRY By Michal Kliman Dissertation Submitted to the Faculty of the Graduate School of Vanderbilt University in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY in Chemistry August, 2011 Nashville, Tennessee Approved: Professor John A. McLean Professor Terry P. Lybrand Professor H. Alex Brown Professor Christopher J. Janetopoulos Dedicated to Viera, my loving wife, my companion and best friend, our loves Peter, Agatha and Esther, Dad Cyril, Mom Marianna, Sister Mariana, and the Brothers and Sisters in Faith. ii ACKNOWLEDGEMENTS I would like to first thank my advisor, Dr. John A. McLean, for unwavering encouragement, superb advice and for exemplifying and leading in the art of telling a good story. I was fortunate to join Dr. McLean’s laboratory when it first formed, and helped to set up and christen by work the first instruments and optics with and alongside great coworkers Larissa Fenn, Whitney Ridenour, Randi Gant-Branum, Sophie Zhao, Josh Kerr, Sevugarajan Sundarapandian, Ablatt Mahsut, Jeff Enders, Cody Goodwin, Jody May, Jay Forsythe, Seth Byers, Kelly Hines, and Alyssa Granger. I have since witnessed the growth and success of this group, and savored every fruitful conversation and collaboration within and without the laboratory. My academic journey was greatly enriched through training with Eric Dawson, Jarrod Smith, and Jonathan Sheehan, through collaborative work with Niranjana Vijayakrishnan, Dr. Kendal Broadie, Gus Wright, Libin Xu, Keri Tallman, Dr. Ned Porter, Dr. David Hercules, Dr. Zeljka Korade, and Dr. Brian Bachmann. Colleagues from outside of Vanderbilt campus, including Misha Ugarov, Tom Egan, Dr. -
LASER Light Amplification by Stimulated Emission of Radiation
LASER Light Amplification by Stimulated Emission of Radiation Principle and applications The process which makes lasers possible, Stimulated Emission, was proposed in 1917 by Albert Einstein. No one realized the incredible potential of this concept until the 1950's, when practical research was first performed on applying the theory of stimulated emission to making lasers. It wasn't until 1960 that the first true laser was made by Theodore Maimam, out of synthetic ruby. Many ideas for laser applications quickly followed, including some that never worked, like the laser eraser. Still, the early pioneers of laser technology would be shocked and amazed to see the multitude of ways that lasers are used by everyone, everyday, in today's worlds Ordinary light laser light :- 1. directional 2. coherent 3. high intensity 4. Monochromatic Properties of LASER light • Monochromaticity: Properties of LASER light • Directionality: Conventional light source Beam Divergence angle (θd) • Highly Intense: since highly directional, coherent entire output is concentrated in a small region and intensity becomes very high I = (10/ λ)2 P P= power radiated by laser Properties of LASER light Incoherent light waves coherent light waves Laser History • Was based on Einstein’s idea of the “particlewave duality” of light, more than 30 years earlier • Invented in 1958 by Charles Townes (Nobel prize in Physics 1964) and Arthur Schawlow of Bell Laboratories • The first patent (1958) MASER = Microwave Amplification by Stimulated Emission of Radiation • 1958: Schawlow, A.L. and Townes, C.H. – Proposed the realization of masers for light and infrared got Nobel prize 1917: Einstein, A. - Concept and theory of stimulated light emission 1948: Gabor, D. -
Module 1-1 Elements and Operation of a Laser
1 MODULE 1-1 ELEMENTS AND OPERATION OF A LASER 2 (1) The laser is a light source that exhibits unique properties and a wide variety of applications. Lasers are used in welding, surveying, medicine, communication, national defense, and as tools in many areas of scientific research. Many types of lasers are commercially available today, ranging in size from devices that can rest on a fingertip to those that fill large buildings. All these lasers have certain basic characteristic properties in common. (2) This module discusses the basic properties that distinguish laser light from other light sources and the essential elements required to produce this unique light. The lasing process is examined briefly, and several of the terms used to describe and characterize the process are introduced. In the laboratory section, the student will become acquainted with the basic safety procedures for the operation of a low-powered helium-neon gas laser and will identify the components of that laser. (3)The student should take particular note that this module is designed to introduce all of the concepts to be studied in this course. Each topic covered here is discussed in greater detail in later modules. Upon completion of this module, the student should be able to: 1.1 Define the following properties of laser light: o 1.1.1 Monochromaticity. o 1.1.2 Directionality. o 1.1.3 Coherence. 1.2 Define the following terms that relate to the lasing process: o 1.2.1 Photon. o 1.2.2 Wavelength. o 1.2.3 Atomic ground state. -
The Dipole Project: Towards High Energy, High Repetition Rate Diode Pumped Lasers
The DiPOLE project: towards high energy, high repetition rate diode pumped lasers Contact [email protected] Klaus Ertel, Saumyabrata Banerjee, Paul Mason, Jonathan Tristan Davenne, Michael Fitton, John Hill, Andrew Phillips, Phil Rice, Steph Tomlinson, Christian Sawyer, Lintern Steve Blake, Cristina Hernandez-Gomez, John Collier Engineering Technology Centre, STFC Rutherford Appleton Central Laser Facility, STFC Rutherford Appleton Laboratory, Laboratory, Chilton, Didcot, OX11 0QX, UK Chilton, Didcot, OX11 0QX, UK Introduction Gain material selection DiPOLE stands for Di ode Pumped Optical Laser for The starting point was the identification of the most suitable Experiments. It is a new project at the CLF to develop the gain material. This material needs to provide: foundations of novel high energy, high average power laser • A long fluorescence lifetime to minimise the number of systems based on diode pumped solid state laser (DPSSL) pump diodes required technology. Compared to conventional systems, this approach promises dramatically increased repetition rates (and hence • Good thermo-mechanical properties to handle the high average powers) at significantly higher electrical-to-optical average power conversion efficiency. DiPOLE has been included as an • Reasonably high gain cross section to enable uncomplicated emerging opportunity in the Research Councils UK Large and efficient energy extraction Facilities Roadmap [1]. • The possibility to be manufactured in large sizes to handle Motivation the high pulse energy. Laser amplifiers capable of producing energetic ns-pulses are Ytterbium (Yb) as an active laser ion offers very long one of the main tools for laser plasma research and high-energy fluorescence lifetimes, a low quantum defect (pump wavelength applications.