M. S. Zubairy

Noise free amplification via the two-photon correlated spontaneous emission laser☆

Abstract It is shown that a two-photon linear amplifier adds a phase-sensitive noise to the input signal. It is therefore possible to amplify a squeezed-signal quadrature with reduced added noise compared to standard phase-insensitive amplifiers. It is also shown that, under certain conditions on the input and the amplifier, it is possible to amplify a super-Poisson signal into a sub-Poisson output signal.

Nuclear spectroscopy with X-ray lasers

Abstract The effects expected from irradiating a beta-unstable nucleus having a very low-lying excited state with a resonant X-ray laser are investigated.

Radiative energy transfer in a randomly fluctuating medium

Abstract The basic laws of the phenomenological theory of radiative energy transfer are derived, under certain conditions, within the framework of the stochastic scalar wave theory. An equation of radiative energy transfer is derived for wave propagation in a statistically quasihomogeneous medium. Our results relate the extinction and scattering coefficients (which are introduced heuristically in the conventional theory of radiative energy transfer) to the stochastic characteristics of the medium.

Beam width correction in high precision Sagnac interferometry

Abstract The effect of finite beam width on the Sagnac frequency shift is calculated using a general relativistic analysis. For small rotation rates, the beam width effect dominates over lowest order special relativistic corrections, and is a possible source of error in precision measurements.

Coherence And Fluctuations In The Free-Electron Laser: A Fully Quantum Mechanical Approach

Recent results on the photon statistics of the free-electron laser regarding start-up, amplification and steady state operation are summarized. The underlying theoretical model is based on the fully quantized Bambini-Renieri Hamiltonian.

Atomic memory effects in the quantum theory of laser

Abstract In the quantum noise operator approach to many problems in quantum optics, the noise operator in the equation for the field operator is delta-correlated. This ignores the atomic memory effects. We here extend the theory to include such effects which lead to a spontaneous emission phase diffusion rate which differs from the usual result.

Effect of amplitude fluctuations on the dynamics of the degenerate parametric amplifier

Abstract The effect of amplitude fluctuations of the pump field on the Q -representation of the signal field in a degenerate parametric amplification process is investigated.

Degenerate Parametric Amplification Process; A Path-Integral Approach

In an earlier paper we developed a formalism for applying path integrals to certain problems in nonlinear optics [1]. We presented a path-integral representation for the coherent-state propagator and discussed the properties of the propagator. The path-integral representation of the propagator allows one to see more clearly than the standard operator approach the connection between the classical and quantum dynamics of the system.