Investigation On Squeezing Light And Observation Of Electromagnetically Induced Transparency-like Effect In Phase-sensitive Optical Parametric Amplifier

The experiment research of quantum optics achieved gratifying results in the last four decades, especially in the non-classical field generation and applications. Because of the existence of light particles, noise exists even in complete coherent field. This noise is due to the process in light emissions itself, known as shot noise, is the performance of optical particle. The shot noise has become insurmountable obstacles in many areas. Breakthrough in the shot noise limit, accurately measure physical system in the quantum level has become an important concern to research in past three decades. To break through the limitations of quantum noise, an effective way is maximize the decrease of quantum noise in light source. Rrestricted by Heisenberg uncertainty principle, a certain component of quantum noise below the shot noise limit, its conjugate component of the quantum noise is inevitably greater than the shot noise limit, called squeezed light.At present, squeezed state is one of the most popular studies of quantum optics. Squeezed light can be widely used in quantum optics research, such as: optical precision measurement, quantum information ultra-weak transmission, entangled state generation, quantum communication etc..This paper studies generation, characteristics and manipulation of the squeezed light by using optical parametric amplifier. The main content is divided into the following four parts:1) Reviewed the emergence and development of quantum mechanics briefly. Introduced two non-classical states: coherent state and squeezed state in their characteristics and status of the current study.2) Introduced quasi-phase matching and periodically poled crystal in degenerate optical parametric amplification process, established a theoretical model of the degenerate optical parametric amplifier. The experimental setup is introduced, results is given. 3.41dB vacuum squeezing and 3.35dB bright squeezing are observed. Output squeezing under different pump power was studied experimentally, concluded that the maximum degree squeezing always appears when the pump power near half of threshold. 3) Introduced quantum tomography briefly, analyzed the inverse Random transform theoretically. Measured the noise of vacuum and squeezed vacuum state in different phase angle by using quantum tomography measurement and reconstructed the Wigner quasi-probability distribution function.4) Calculated phase-sensitive optical parametric amplifier driven by a squeezed vacuum, simulated quantum interference phenomena in the phase-sensitive optical parametric amplifier theoretically, observed quantum interference phenomena in the phase-sensitive optical parametric amplifier by introduced squeezed vacuum. And implemented manipulations of a squeezed vacuum field in an optical parametric amplifier, further squeezing and anti-squeezing are observed.5) Analyzed reflection, transmission and dispersion characteristics of the double resonance degenerate optical parametric amplifier theoretically and experimentally. Decrease of absorption, and strong dispersion are observed when the finesse of the pump field is much higher than the signal field, EIT like effect is realized in the optical parametric amplifier.Innovative work is the following:1. Reconstructed Wigner quasi-probability distribution function of squeezed state by using quantum tomography technology.2. Experimentally observed quantum interference phenomenon in phase-sensitive optical parametric amplifier for the first time. And manipulated squeezed vacuum state by using of the optical parametric amplifier.3. Simulated EIT effect theoretically and experimentally by using a double resonant phase-sensitive optical parametric amplifier.