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PARTIALLY COHERENT PULSE PROPAGATION IN RESONANT LINEAR AND NONLINEAR MEDIA

Laleh Mokhtarpour

Published Jan 18, 2016• 0 citations
OpenAlex

Abstract

Optical experiments reveal the fact that real laser pulses have random fluctuations in their amplitude and phase that crucially affect pulse evolution. Statistical optics considers the random nature of light to give a more realistic description of laser pulses behavior. Generation of ultrashort pulses, operating at frequencies close to internal transition frequencies of medium atoms, motivated the growing interest in studying on-resonance light-matter interactions. Moreover, there exist optical phenomena that only occur at optical resonance. Thus, near resonance light-matter interactions are of great importance. In this dissertation, statistical properties of ultrashort pulses propagating in different linear and nonlinear media near optical resonance is studied. Various partially coherent pulses are simulated and effects of initial statistical properties of pulses on their propagation in resonant absorbing and amplifying media are explored. The research performed throughout this thesis leads to following results. 1- Various classes of ultrashort self-similar partially coherent pulses are explored along with closed form expressions for their correlation functions. Also, the evolution of coherence properties of pulses upon their short-distance and long-distance propagation is investigated. 2- Generic partially coherent pulses are simulated and their global and local correlation properties upon propagation in resonant linear absorber media are studied. The evolution of the coherence functions of pulses shows that partially coherent pulses are strongly affected by the medium regarding to their coherence levels. A correlation area theorem is also derived to describe global correlation properties of stochastic pulses propagating in such media. 3- Evolution of small-area pulse coherence properties, propagating in linear amplifiers near optical resonance, is studied. Our simulation results reveal that more coherent pulses are amplified more effectively by the medium than are their less coherent counterparts. 4- Propagation of partially coherent pulses in resonant, inhomogenously broadened nonlinear media is simulated. Stochastic pulses of different coherence levels are generated to investigate effects of initial properties of pulses on their long-term evolution. We also provide evidence of self-induced transparency phenomena and soliton formation for relatively coherent pulses. Also, evolution of the coherence functions reveal that low-coherence pulses lose their coherence level upon propagation faster than do highly coherent pulses.

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EXPLORING SOLITON AND SIMILARITON FORMATION IN RESONANT OPTICAL MEDIA

Soodeh Haghgoo

Investigating the behavior of an atom in response to the applied electric field when the latter frequency is in resonance with the natural frequency of the atom is an interesting subject. Near resonance, some of the most interesting optical phenomena such as dispersion, and absorption are more pronounced. Moreover, considering resonant and near resonant interaction of light with two-level atoms, uncovers fascinating physical phenomena such as area theorem and self-induced transparency describing stable pulse propagation regimes in which the pulses maintain their identity. Existence of these optical structures in on-resonance optical media has not been investigated in detail. In this thesis, the on-resonance interaction of optical field with atoms is considered and the formation of several novel self-similar and kink waves in linear and nonlinear resonant media is discovered and theoretically explored. First, self-similar pulse formation in homogeneous broadened linear amplifiers in a vicinity of an optical resonance is analyzed. It is demonstrated that the self-similar pulses serve as universal asymptotics of any near resonance short pulses propagating in coherent linear amplifiers. Second, ultrashort self-similar pulse propagation in coherent linear absorbers near optical resonance is investigated. Third, existence of self-similar optical waves with kink structure in resonant optical systems is discovered. Fourth, it is found that self-induced transparency quadratic solitons are realizable in the media with quadratic optical nonlinearities, doped with resonant impurities. Finally, stable spatial similaritons supported by homogeneous conservative optical media with quintic nonlinearities are explored. To experimentally realize the presented results, physical models are presented for all systems under consideration. The stability of the proposed near resonance optical systems is demonstrated through a series of numerical case studies.

•Oct 5, 2012•1 citation

Propagation of Ultra-short Stochastic Pulses in Resonant Media

Laleh Mokhtarpour

In this book, we focus on the stochastic nature of pulses to achieve a more realistic description of ultra-short optical pulses affected by noise. In order to simulate ultra-short pulses, various stochastic pulse models were applied. The effects of pulse amplitude and phase fluctuations on its propagation in various linear and non-linear media were studied based on optical coherence theory. The response of the medium atoms to the applied stochastic pulses was investigated for the particular resonant case in which the pulse frequency nearly coincides with the atom resonance frequency. Analytical and numerical propagation methods were applied to explore evolutions of ultra-short stochastic pulses in the vicinity of optical resonance.

•Feb 22, 2016•0 citations

Ultrashort pulse coherence properties in coherent linear amplifiers

Laleh Mokhtarpour, Sergey A. Ponomarenko

We examine coherence properties of small-area, intrinsically stationary statistical pulses propagating in amplifying media in the vicinity of an optical resonance. Any such medium acts as a coherent linear amplifier, amplifying and reshaping the pulse. We show that an initially nearly incoherent Gaussian Schell-model pulse becomes almost fully coherent and its state of coherence becomes nearly uniform across the temporal profile as the pulse propagates into the amplifying medium.

Journal of the Optical Society of America A•Mar 8, 2013•11 citations

Propagation effects in atomic systems for ultrashort and long pulses: Control of the optical response

F. A. Hashmi

This thesis deals with the study of propagation effects experienced by weak light pulses as they propagate in atomic media driven by strong pulses. We explore both the ultra-short and long pulse regime and investigate the phenomena that arise at these different time scales. In the short pulse regime, a strongly driven two level atomic system presents transient light shifts, and non-adiabatic transitions occur between these adiabatic levels. We have studied a method to probe these light shifts in real time by propagating a weak probe through the medium. The light shifts enrich the spectrum of the probe and the probe gets shaped as a result. In this way a strongly driven two-level system can act as an active pulse shaper, and can introduce oscillations in the temporal profile of an ultra-short pulse at a time scale shorter than the pulse duration. We also show that by driving the system with two time delayed non-resonant strong fields, the non-adiabatic effects can be rendered phase dependent. This gives very sensitive phase control of the excited state population and can be used to formulate new techniques in interferometry. In the long pulse regime we present a new method of slowing light that can be realized in a double two-level system interacting with two orthogonally polarized light pulses that propagate along different axis. Spatio-temporal dependence of the total polarization induces a grating in the ground Zeeman coherence. The stronger of the two fields (the control field) is diffracted from this grating into the direction of the weak probe field compensating for the absorption of this latter field. A transparency window is thus created in the absorption spectrum of the probe leading to the slowing down of light. The transparency window exhibits characteristics similar to the one obtained by EIT (electromagnetic induced transparency) method. However, the important difference between our method and the traditional EIT method, is that ours doesn't rely on realizing dark state in the system. This may open the possibility of slowing down light in more complex atomic media. Moreover, when the linear absorptive response of the medium is cancelled in this manner, the nonlinear response becomes more important. In the situation where fields propagate in the same direction and have same frequency, two regimes have been investigated. For small optical depths, the effective susceptibility behaves as chi_lin exp[2 i phi] (with phi the phase difference between two fields). This renders phase control of the medium response, and the medium can be changed from an absorber to an amplifier, with normal or anomalous dispersion, by adjusting the relative phase phi.  In the regime of large optical thickness, phase saturation takes place and the effective susceptibility turns into chi_lin*, changing an absorber into an amplifier without effecting the dispersive response (chi_lin is linear susceptibility).

•Feb 3, 2009•1 citation

Coherent effects in the propagation of ultrashort light pulses in resonant media. Part I (review)

I A Poluéktov, Yurii M Popov, V S Roĭtberg

A review is given of the investigations of the coherent interaction of light pulses with resonantly absorbing two-level media. An analysis is made of the self-induced transparency discovered by McCall and Hahn and of its importance in quantum electronics. Bleached states associated with the phase modulation are considered in detail. A comparison is made with the theory of nonlinear waves of different physical origin. A review is given of some possible physical applications associated with the discriminatory nature of the transmission and delay of light in the self-induced transparency effect.

Soviet Journal of Quantum Electronics•Apr 30, 1974•3 citations

Coherence and Quantum Optics V: Proceedings of the Fifth Rochester Conference on Coherence and Quantum Optics held at the University of Rochester, June 13–15, 1983

Joseph H. Eberly, L. Mandeļ, E. Wolf

W1 Resonant Pulse Propagation I.- W1-1 Some Nonlinear Properties of Pulse Propagation.- W1-2 Self-Induced Transparency in the Broadline and Narrowline Limits and Applications.- W1-3 Observation of Zero-Degree Pulse Propagation in a Resonant Medium.- W1-4 Higher Conservation Laws and Coherent Pulse Propagation.- W2 Quantum Electrodynamics and Alternative Theories I.- W2-1 Survey of the Present Status of Neoclassical Radiation Theory.- W2-2 A Test of Jaynes' Neoclassical Theory: Incoherent Resonance Fluorescence from a Coherently Excited State.- W2-3 Experimental Limitations to the Validity of Semiclassical Radiation Theories.- W2-4 Time Delay Statistics of Photoelectric Emissions: An Experimental Test of Classical Radiation Theory.- W3 Coherence Effects in Spontaneous Emission I.- W3-1 Non-Linear Radiation Reaction.- W3-2 Master Equations in the Theory of Incoherent and Coherent Spontaneous Emission.- W3-3 Influence of Resonant Frequency Shifts on Superradiant Damping.- W3-4 Spontaneous Emission Rate in the Presence of a Mirror.- W4 Coherence I.- W4-1 Atomic Coherent States in Quantum Optics.- W4-2 Coherent States in Modern Physics.- W4-3 Debye Representation and Multipole Expansion of the Quantized Free Electromagnetic Field.- W4-4 Volume of Coherence.- T1 Quantum Electrodynamics and Alternative Theories II.- T1-1 A Quantum Treatment of Spontaneous Emission without Photons.- T1-2 Finite Quantum and Classical Electrodynamics.- T1-3 The Use of Classical Solutions in Quantum Optics.- T1-4 Raman Effect in Semiclassical Theory.- T2 Light Scattering I.- T2-1 Theory of Resonant Light Scattering Processes in Solids.- T2-2 A Generalized Extinction Theorem and Its Role in Scattering Theory.- T2-3 Mode Analysis and Mode Coupling of Electromagnetic Fields in Spatially Dispersive Media.- T2-4 Amplitude Stabilization of Pulses from a Q-Switched Ruby Laser by Means of Interaction with a Non-Linear Medium.- T3 Correlation and Fluctuation Measurements.- T3-1 Two-Photon Time Distributions in Mixed Light Beams.- T3-2 Photocounting Inversion in Presence of Dead Time Effects.- T3-3 Image Reconstruction from the Modulus of the Correlation Function: A Practical Approach to the Phase Problem of Coherence Theory.- T3-4 Photon-Correlation Spectroscopy.- T3-5 Multi-Time Intervals Distributions of Photoelectrons from Stationary Pseudo-Thermal Light with Gaussian Spectrum.- T4 Light Scattering II.- T4-1 Adventures in Green's Land: Light Scattering in Anisotropic Media.- T4-2 Intensity Fluctuation Techniques in Light Scattering.- T4-3 Coherence Properties of Light through a Liquid Crystal.- T4-4 C. Non-Critical Rayleigh Scattering from Pure Liquids.- T5 Coherence Effects in Spontaneous Emission II.- T5-1 Cooperative Effects in Spontaneous Emission.- T5-2 Amplified Spontaneous Emission.- T5-3 Non-Gaussian Statistics of Superradiant Radiation from Saturated Xenon 3.5?m Laser Amplifier.- T5-4 On the Theory of Radiating Electrons.- T6 Coherent Light Interactions.- T6-1 Atomic and Molecular Spectroscopy by Saturation with Coherent Light.- T6-2 Response Functions for Strongly Driven Systems.- T6-3 Mechanism of Interaction of Picosecond Light Pulses with Matter Yielding Self-Trapping.- T6-4 Resonance Fluorescence Lineshapes with Intense Applied Fields.- T6-5 Electron Beams as Carriers of Optical Coherence.- T7 Lasers.- T7-1 Detuned Single Mode Laser and Detailed Balance.- T7-2 Tunable Raman Lasers.- T7-3 Dye Lasers: Recent Advances in Tunable Systems.- F1 Quantum Electrodynamics and Alternative Theories III.- F1-1 A Theory of Light without Photons: Implications from Fermis to Light Years.- F1-2 Blackbody Heat Capacity and Action-at-a-Distance Electrodynamics.- F1-3 The Implications of Radiative Equilibrium in Jaynes' Extension of Semiclassical Radiation Theory.- F1-4 A Quantum Electrodynamic Investigation of the Jaynes-Crisp-Stroud Approach to Spontaneous Emission.- F1-5 Critical Comments on Radiation Theory.- F2 Resonant Pulse Propagation II.- F2-1 Cooperative Phenomena in Resonant Propagation.- F2-2 Theory of Sub-Cooperation-Limit Optical Pulses in Resonant Absorbers.- F2-3 Multiple Pulse Chirping in Self-Induced Transparency.- F2-4 Coupled Superradiance Master Equations: Application to Fluctuations in Coherent Pulse Propagation in Resonant Media.- F3 Coherence II.- F3-1 The Laser-Phase Transition Analogy - Recent Developments.- F3-2 Multiple-Time-Scale Analysis of Coherent Radiation.- F3-3 Orthogonal Operators and Phase Space Distributions in Quantum Optics.- F4 Coherence Effects in Spontaneous Emission III.- F4-1 Radiation by Many Excited Atoms between Mirrors.- F4-2 Transient Coherent Emission.- F4-3 Superradiance from a System of 3-Level Particles.- F4-4 A Quantum Electrodynamic View of Superradiance as a Competition between Stimulated and Spontaneous Atomic Decay.- F5 Post Deadline Session.- F5-1 Third- and Higher-Order Intensity Correlations in Laser Light.- F5-2 Correlation Function of a Laser Beam near Threshold.- F5-3 Localization of Photons.- F5-4 Adiabatic Following and the Self-Defocusing of Light in Rubidium Vapor.- F5-5 Experimental Evidence of an X-Ray Laser.- F5-6 Quantum Theory of Photodetection and Coherence Properties of Electrons.- F5-7 Statistics of Light Scattered by Non-Gaussian Fluctuations.- F6 Quantum Noise.- F6-1 Unified Thermodynamics of Dissipative Structures and Coherence in Nonlinear Optics.- F6-2 The Approach to Thermal Equilibrium in Systems of Coupled Quantum Oscillators Initially in a Generalized Gaussian State.- F6-3 Comparison between Incoherent and Chaotic Sources: Contribution to the Study of the Origin of Bunching Effect.- F6-4 Self-Pulsing in Laser Amplification of Broadband Noise.- Author Index.

•Jan 9, 2014•0 citations
Optical experiments reveal the fact that real laser pulses have random fluctuations in their amplitude and phase that crucially affect pulse evolution. Statistical optics considers the random nature of light to give a more realistic description of laser pulses behavior. Generation of ultrashort pulses, operating at frequencies close to internal transition frequencies of medium atoms, motivated the growing interest in studying on-resonance light-matter interactions. Moreover, there exist optical phenomena that only occur at optical resonance. Thus, near resonance light-matter interactions are of great importance. In this dissertation, statistical properties of ultrashort pulses propagating in different linear and nonlinear media near optical resonance is studied. Various partially coherent pulses are simulated and effects of initial statistical properties of pulses on their propagation in resonant absorbing and amplifying media are explored. The research performed throughout this thesis leads to following results. 1- Various classes of ultrashort self-similar partially coherent pulses are explored along with closed form expressions for their correlation functions. Also, the evolution of coherence properties of pulses upon their short-distance and long-distance propagation is investigated. 2- Generic partially coherent pulses are simulated and their global and local correlation properties upon propagation in resonant linear absorber media are studied. The evolution of the coherence functions of pulses shows that partially coherent pulses are strongly affected by the medium regarding to their coherence levels. A correlation area theorem is also derived to describe global correlation properties of stochastic pulses propagating in such media. 3- Evolution of small-area pulse coherence properties, propagating in linear amplifiers near optical resonance, is studied. Our simulation results reveal that more coherent pulses are amplified more effectively by the medium than are their less coherent counterparts. 4- Propagation of partially coherent pulses in resonant, inhomogenously broadened nonlinear media is simulated. Stochastic pulses of different coherence levels are generated to investigate effects of initial properties of pulses on their long-term evolution. We also provide evidence of self-induced transparency phenomena and soliton formation for relatively coherent pulses. Also, evolution of the coherence functions reveal that low-coherence pulses lose their coherence level upon propagation faster than do highly coherent pulses.
Investigating the behavior of an atom in response to the applied electric field when the latter frequency is in resonance with the natural frequency of the atom is an interesting subject. Near resonance, some of the most interesting optical phenomena such as dispersion, and absorption are more pronounced. Moreover, considering resonant and near resonant interaction of light with two-level atoms, uncovers fascinating physical phenomena such as area theorem and self-induced transparency describing stable pulse propagation regimes in which the pulses maintain their identity. Existence of these optical structures in on-resonance optical media has not been investigated in detail. In this thesis, the on-resonance interaction of optical field with atoms is considered and the formation of several novel self-similar and kink waves in linear and nonlinear resonant media is discovered and theoretically explored. First, self-similar pulse formation in homogeneous broadened linear amplifiers in a vicinity of an optical resonance is analyzed. It is demonstrated that the self-similar pulses serve as universal asymptotics of any near resonance short pulses propagating in coherent linear amplifiers. Second, ultrashort self-similar pulse propagation in coherent linear absorbers near optical resonance is investigated. Third, existence of self-similar optical waves with kink structure in resonant optical systems is discovered. Fourth, it is found that self-induced transparency quadratic solitons are realizable in the media with quadratic optical nonlinearities, doped with resonant impurities. Finally, stable spatial similaritons supported by homogeneous conservative optical media with quintic nonlinearities are explored. To experimentally realize the presented results, physical models are presented for all systems under consideration. The stability of the proposed near resonance optical systems is demonstrated through a series of numerical case studies.
In this book, we focus on the stochastic nature of pulses to achieve a more realistic description of ultra-short optical pulses affected by noise. In order to simulate ultra-short pulses, various stochastic pulse models were applied. The effects of pulse amplitude and phase fluctuations on its propagation in various linear and non-linear media were studied based on optical coherence theory. The response of the medium atoms to the applied stochastic pulses was investigated for the particular resonant case in which the pulse frequency nearly coincides with the atom resonance frequency. Analytical and numerical propagation methods were applied to explore evolutions of ultra-short stochastic pulses in the vicinity of optical resonance.
This thesis deals with the study of propagation effects experienced by weak light pulses as they propagate in atomic media driven by strong pulses. We explore both the ultra-short and long pulse regime and investigate the phenomena that arise at these different time scales. In the short pulse regime, a strongly driven two level atomic system presents transient light shifts, and non-adiabatic transitions occur between these adiabatic levels. We have studied a method to probe these light shifts in real time by propagating a weak probe through the medium. The light shifts enrich the spectrum of the probe and the probe gets shaped as a result. In this way a strongly driven two-level system can act as an active pulse shaper, and can introduce oscillations in the temporal profile of an ultra-short pulse at a time scale shorter than the pulse duration. We also show that by driving the system with two time delayed non-resonant strong fields, the non-adiabatic effects can be rendered phase dependent. This gives very sensitive phase control of the excited state population and can be used to formulate new techniques in interferometry. In the long pulse regime we present a new method of slowing light that can be realized in a double two-level system interacting with two orthogonally polarized light pulses that propagate along different axis. Spatio-temporal dependence of the total polarization induces a grating in the ground Zeeman coherence. The stronger of the two fields (the control field) is diffracted from this grating into the direction of the weak probe field compensating for the absorption of this latter field. A transparency window is thus created in the absorption spectrum of the probe leading to the slowing down of light. The transparency window exhibits characteristics similar to the one obtained by EIT (electromagnetic induced transparency) method. However, the important difference between our method and the traditional EIT method, is that ours doesn't rely on realizing dark state in the system. This may open the possibility of slowing down light in more complex atomic media. Moreover, when the linear absorptive response of the medium is cancelled in this manner, the nonlinear response becomes more important. In the situation where fields propagate in the same direction and have same frequency, two regimes have been investigated. For small optical depths, the effective susceptibility behaves as chi_lin exp[2 i phi] (with phi the phase difference between two fields). This renders phase control of the medium response, and the medium can be changed from an absorber to an amplifier, with normal or anomalous dispersion, by adjusting the relative phase phi.  In the regime of large optical thickness, phase saturation takes place and the effective susceptibility turns into chi_lin*, changing an absorber into an amplifier without effecting the dispersive response (chi_lin is linear susceptibility).
A review is given of the investigations of the coherent interaction of light pulses with resonantly absorbing two-level media. An analysis is made of the self-induced transparency discovered by McCall and Hahn and of its importance in quantum electronics. Bleached states associated with the phase modulation are considered in detail. A comparison is made with the theory of nonlinear waves of different physical origin. A review is given of some possible physical applications associated with the discriminatory nature of the transmission and delay of light in the self-induced transparency effect.
W1 Resonant Pulse Propagation I.- W1-1 Some Nonlinear Properties of Pulse Propagation.- W1-2 Self-Induced Transparency in the Broadline and Narrowline Limits and Applications.- W1-3 Observation of Zero-Degree Pulse Propagation in a Resonant Medium.- W1-4 Higher Conservation Laws and Coherent Pulse Propagation.- W2 Quantum Electrodynamics and Alternative Theories I.- W2-1 Survey of the Present Status of Neoclassical Radiation Theory.- W2-2 A Test of Jaynes' Neoclassical Theory: Incoherent Resonance Fluorescence from a Coherently Excited State.- W2-3 Experimental Limitations to the Validity of Semiclassical Radiation Theories.- W2-4 Time Delay Statistics of Photoelectric Emissions: An Experimental Test of Classical Radiation Theory.- W3 Coherence Effects in Spontaneous Emission I.- W3-1 Non-Linear Radiation Reaction.- W3-2 Master Equations in the Theory of Incoherent and Coherent Spontaneous Emission.- W3-3 Influence of Resonant Frequency Shifts on Superradiant Damping.- W3-4 Spontaneous Emission Rate in the Presence of a Mirror.- W4 Coherence I.- W4-1 Atomic Coherent States in Quantum Optics.- W4-2 Coherent States in Modern Physics.- W4-3 Debye Representation and Multipole Expansion of the Quantized Free Electromagnetic Field.- W4-4 Volume of Coherence.- T1 Quantum Electrodynamics and Alternative Theories II.- T1-1 A Quantum Treatment of Spontaneous Emission without Photons.- T1-2 Finite Quantum and Classical Electrodynamics.- T1-3 The Use of Classical Solutions in Quantum Optics.- T1-4 Raman Effect in Semiclassical Theory.- T2 Light Scattering I.- T2-1 Theory of Resonant Light Scattering Processes in Solids.- T2-2 A Generalized Extinction Theorem and Its Role in Scattering Theory.- T2-3 Mode Analysis and Mode Coupling of Electromagnetic Fields in Spatially Dispersive Media.- T2-4 Amplitude Stabilization of Pulses from a Q-Switched Ruby Laser by Means of Interaction with a Non-Linear Medium.- T3 Correlation and Fluctuation Measurements.- T3-1 Two-Photon Time Distributions in Mixed Light Beams.- T3-2 Photocounting Inversion in Presence of Dead Time Effects.- T3-3 Image Reconstruction from the Modulus of the Correlation Function: A Practical Approach to the Phase Problem of Coherence Theory.- T3-4 Photon-Correlation Spectroscopy.- T3-5 Multi-Time Intervals Distributions of Photoelectrons from Stationary Pseudo-Thermal Light with Gaussian Spectrum.- T4 Light Scattering II.- T4-1 Adventures in Green's Land: Light Scattering in Anisotropic Media.- T4-2 Intensity Fluctuation Techniques in Light Scattering.- T4-3 Coherence Properties of Light through a Liquid Crystal.- T4-4 C. Non-Critical Rayleigh Scattering from Pure Liquids.- T5 Coherence Effects in Spontaneous Emission II.- T5-1 Cooperative Effects in Spontaneous Emission.- T5-2 Amplified Spontaneous Emission.- T5-3 Non-Gaussian Statistics of Superradiant Radiation from Saturated Xenon 3.5?m Laser Amplifier.- T5-4 On the Theory of Radiating Electrons.- T6 Coherent Light Interactions.- T6-1 Atomic and Molecular Spectroscopy by Saturation with Coherent Light.- T6-2 Response Functions for Strongly Driven Systems.- T6-3 Mechanism of Interaction of Picosecond Light Pulses with Matter Yielding Self-Trapping.- T6-4 Resonance Fluorescence Lineshapes with Intense Applied Fields.- T6-5 Electron Beams as Carriers of Optical Coherence.- T7 Lasers.- T7-1 Detuned Single Mode Laser and Detailed Balance.- T7-2 Tunable Raman Lasers.- T7-3 Dye Lasers: Recent Advances in Tunable Systems.- F1 Quantum Electrodynamics and Alternative Theories III.- F1-1 A Theory of Light without Photons: Implications from Fermis to Light Years.- F1-2 Blackbody Heat Capacity and Action-at-a-Distance Electrodynamics.- F1-3 The Implications of Radiative Equilibrium in Jaynes' Extension of Semiclassical Radiation Theory.- F1-4 A Quantum Electrodynamic Investigation of the Jaynes-Crisp-Stroud Approach to Spontaneous Emission.- F1-5 Critical Comments on Radiation Theory.- F2 Resonant Pulse Propagation II.- F2-1 Cooperative Phenomena in Resonant Propagation.- F2-2 Theory of Sub-Cooperation-Limit Optical Pulses in Resonant Absorbers.- F2-3 Multiple Pulse Chirping in Self-Induced Transparency.- F2-4 Coupled Superradiance Master Equations: Application to Fluctuations in Coherent Pulse Propagation in Resonant Media.- F3 Coherence II.- F3-1 The Laser-Phase Transition Analogy - Recent Developments.- F3-2 Multiple-Time-Scale Analysis of Coherent Radiation.- F3-3 Orthogonal Operators and Phase Space Distributions in Quantum Optics.- F4 Coherence Effects in Spontaneous Emission III.- F4-1 Radiation by Many Excited Atoms between Mirrors.- F4-2 Transient Coherent Emission.- F4-3 Superradiance from a System of 3-Level Particles.- F4-4 A Quantum Electrodynamic View of Superradiance as a Competition between Stimulated and Spontaneous Atomic Decay.- F5 Post Deadline Session.- F5-1 Third- and Higher-Order Intensity Correlations in Laser Light.- F5-2 Correlation Function of a Laser Beam near Threshold.- F5-3 Localization of Photons.- F5-4 Adiabatic Following and the Self-Defocusing of Light in Rubidium Vapor.- F5-5 Experimental Evidence of an X-Ray Laser.- F5-6 Quantum Theory of Photodetection and Coherence Properties of Electrons.- F5-7 Statistics of Light Scattered by Non-Gaussian Fluctuations.- F6 Quantum Noise.- F6-1 Unified Thermodynamics of Dissipative Structures and Coherence in Nonlinear Optics.- F6-2 The Approach to Thermal Equilibrium in Systems of Coupled Quantum Oscillators Initially in a Generalized Gaussian State.- F6-3 Comparison between Incoherent and Chaotic Sources: Contribution to the Study of the Origin of Bunching Effect.- F6-4 Self-Pulsing in Laser Amplification of Broadband Noise.- Author Index.