Physical Processes in Lasers

The present collection of articles sets forth the results of experimental research on physical processes in various types of optical quantum devices (lasers). Data are presented on the regulation of the temporal and spectral characteristics of solid-state lasers using a bleachable filter. A mode self-locking state is realized in which ultraflhort light pulses are emitted. The stimulated emission in a pinch discharge due to transitions of singly and doubly ion­ ized argon atoms in the visible and ultraviolet parts of the spectrum is investigated. Pulsed lasing associated with electron transitions in diatomic molecules at the leading edge of a power­ ful current pulse in a gas is subjected to systematic analysis. The book is aimed at a broad spectrum of scientists and engineers specializing in quan­ tum radiophysics. CONTENTS MODE DISCRIMINATION AND THE SELF-LOCKING EFFECT IN SOLID-STATE LASERS USING A BLEACHABLE FILTER A. S. Markin Introduction 1 Chapter 1. Q S wit chi n g 0 f Las e r s by Mea n s 0 f a Pas s i v e Shu t t e r. . . . 5 1. Operating Principle and Types of Passive Shutters. . . . . . . . . . . . . . . . . . . . 5 2. Q Switching of Neodymium Glass Lasers by Means of a Bleachable Liquid Filter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3. Dependence of the Width and Shape of the Giant Pulse on the Population Inversion Coefficient. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Mode Discrimination and the Self-Locking Effect in Solid-State Lasers Using a Bleachable Filter A. S. Markin.- 1. Q Switching of Lasers by Means of a Passive Shutter.- 2. Spectral Composition of Solid-State Laser Emission and Mode Discrimination by Various Cavity Elements.- 3. Development of the Emission Pulse in the Case of Passive Switching.- 4. Self Mode Locking in a Solid-State Laser Using a Bleachable Filter.- Detection and Investigation of Stimulated Emission in a Pinched Discharge V. M. Sutovsk.- 1. State of the Art of Pulsed Ionic Laser Research.- 2. On the Creation of Negative-Temperature States in a Pinch-Discharge Plasma.- 3. Investigation of the Characteristics of a Pinch Discharge.- 4. Properties of Stimulated Emission in a Pinch-Discharge Plasma at the Transitions of Singly and Doubly Ionized Argon Atoms.- Chapters 5. Determination of the Parameters of the Pinch-Discharge Plasma.- Physical Processes in Molecular Hydrogen, Deuterium, and First-Positive-Band-System Nitrogen Pulsed Gas-Discharge Lasers I. N. Knyaze.- 1. State of the Art of Research on Pulsed Gas-Discharge Lasers; Statement of the Problem.- 2. Experimental Methodological Problems.- 3. Pulsed Emission from H2, D2, and HD Molecules.- 4. Temporal and Energy Characteristics of the First-Positive-Band-System Molecular Nitrogen Laser.- 5. Stimulated Emission Spectrum of the N2(+1) Laser and Interpretation of the Vibrational-Rotational Structural Features of this Spectrum.- 6. Aspects of the. Physics of Pulsed Discharge.- 7. Population Dynamics of the Upper Laser Levels in the 1+ Band System of N2.- 8. Elementary Quantitative Theory of Laser Action in the 1+ Band System of N2.