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This document is the program for the titled symposia. It contains the titles for the papers presented. These are: Collisions Induced Coherence; Photon Statistics, Coherence and Chaos in Optics; Modern Optical Tests of General Relativity; Some Properties of Propagation in a Strongly Absorbing Medium; Diffractive Processes in Multiple Scattering; Higher Order Squeezing of a Quantum Electromagnetic Field; Rydberg Atoms in Cavities- Coherence Cooperation and Fluctuations; Particle Sizing by Coherent Light Scattering; Measuring Singularities on a Fractal; and Use of Glauber Models for the Study of Systems far from Equilibrium.

Partial Contents: STATISTICAL PHYSICS; Fractal singularities in a measure and how to measure singularities on a fractal; Quantum kinetic Heisenberg models: a unique dynamics; The kinetic boundary layer: a small scale system far from equilibrium; NUCLEAR AND HIGH ENERGY PHYSICS; The K+ meson as a probe of neutron densities in deformed nuclei; Properties of the S matrix for absorbing potentials; Glauber theory of electron nucleus scattering; QUANTUM OPTICS; The group velocity of short optical pulses; Order and chaos in quantum optics; Beyond the coherent states: Gaussons of the electromagnetic field; Influence of phase diffusion on spontaneous oscillations in the laser with injected signal; Quantum chaos on a sphere; Quantum theory of balanced homodyne detection; A test for high order squeezing of a quantum electromagnetic field; Quantum coherence effects in a Compton regime free electron laser; Superfluorescence from randomly distributed atoms; and Quantum coherence, dissipation and measurement theory.

We have investigated, designed and tested a modified form of Mach-Zehnder interferometer for measuring the coherence length of a partially coherent source. The instrument is unique that it allows the recording of a fringe pattern and the extraction of the corresponding visibility curve even for sources with poor spatial coherence by virtue of the instrument's differential magnification. To our knowledge, the idea of magnifying a coherence pattern is new and could have important laboratory applications. (Author)

This report summarizes our theoretical and experimental findings. It is divided into 4 sections. Section 1 contains a general introduction to the problem of partially coherernt sources. Section 2 summarizes the main known results on Schell model and quasi-homogeneous sources. Section 3 contains a descriptipn of the experimental set up and of the accuracy of the instrumentation. Section 4 is a preprint of a recently submitted paper unauthored jointly with Dr. E. Collett and detailing the main experimental results obtained under ARO support. (Author)

This report summarizes our experimental findings. It is divided into 3 sections: the first provides a general introduction to the main problem of quasi-homogeneous sources. The second section contains the important experimental findings from far field measurements. The third summarizes our efforts to perform near field coherence measurements. (Author), Addendum to report dated 1 Nov 79, AD-A079 297.

This report summarizes our theoretical and experimental findings. It is divided into 8 sections. Section 1 contains a general description of the problem and a summary of the main results. Section 2 contains the theory of two-photon amplification. Section 3 details the requirements for the selection of an appropriate active medium. Section 4 describes the pumping requirements and the handling and preparation of the vapor cell. Section 5 contains a description of the curve of growth method which has been used in the work to measure the density of Calcium vapor. Section 6 describes the details of operation of the pump dye laser and of the second harmonic generation. Section 7 contains a description of the construction and operation of the infrared dye laser. Section 8 contains a description and technical details of the timing circuitry used to fire the pump and probe lasers in a preassigned temporal sequence. (Author)

This report summarizes the main results of theoretical and experimental investigations on two-photon interaction processes. Theoretical investigations have been directed to the analysis of the evolution of an optical pulse through a pumped medium which operates as a two-photon amplifier. The physical model under consideration consists of a collection of atoms prepared in a state of inversion between two levels of the same parity. An incident pulse with a carrier frequency approximately equal to one-half the atomic transition frequency stimulates an induced nonlinear polarization which oscillates with the same carrier frequency as the incident pulse. The evolution of the coupled atom-field system is described without restriction on the duration of the incident pulse and of the atomic relaxation times. Under coherent propagation conditions, i.e. when the pulse duration is much shorter than the atomic relaxation time, considerable pulse sharpening and power amplification is possible above threshold. In the rate equation limit, a regime where the atomic relaxation times are much shorter than the pulse duration, optimum amplification conditions occur when the frequency of the incident pulse is detuned from its resonance value. The entire range from the coherent to the rate equation limit is explored with the help of hybrid and digital computer simulations. Experimental investigations have lead to the measurement of the two-photon absorption constant in ZnS using a Q-switched ruby laser as the source. The measured value of the absorption constant is 0.013 cm/MW.