Investigation Of The Manipulation Of Vacuum Squeezing Light With An Optical Cavity

The quantum optics is a very important direction of research of the quantum theory. It has made remarkable development in recent decades. As the particles of light, the light field exist noise which is determined by the nature of light, known as Shot Noise. If the noise of a component of a light field is below the shot noise, the light field is the squeezed field. Squeezed field is the important non-classical light field. It can be widely used in quantum optics research, such as:quantum communication, quantum measurement, quantum computers etc.This paper studied the generation of the squeezed light by using periodically poled nonlinear crystal, the relation between the coupling strength of an optical cavity and the interference effects of squeezed light injecting cavity, and the coherent effect of triple-resonant optical parametric amplification inside a cavity with the injection of the squeezed vacuum field.The main content is divided into the following three parts:1) Introduce the compact device of generating vacuum squeezed light. Using a periodically poled crystal KTiOPO4 and stable optical devices to generate stability vacuum squeezed light, we obtained 2dB vacuum squeezing and 8dB vacuum amplification.2) Study the relation between the coupling strength of an optical cavity and the interference effects of squeezed light injecting cavity. First, we calculated the reflection spectra of the cavity with the different coupling strength injecting the squeezed light theoretically. Then, we investigated the feature of squeezed vacuum in the cavity with different coupling strength experimentally.3) Study the coherent effect of triple-resonant optical parametric amplification inside a cavity with the injection of the squeezed vacuum field theoretically. We first constructed the physical model of the three resonant optical parametric amplifier, and then calculated the squeezed field noise in the triple-resonant OPA using the semi-classical formula. Finally, we designed the experiment.