The Stabilization Of Wavelength And Phase In Diode Lasers And Its Applications In Atom Optics

The diode laser is compact, durable, economical, and it can be easily pumped by the inject current and so on. As a result, the diode laser has a wide range of applications in the scientific research and industry. The research of the interaction between atoms and lasers received more and more attentions in the field of quantum optics, where the generally used laser are the diode lasers. For example, most of scientists use the diode laser for laser cooling and trapping which has been developed rapidly in recent years. To fulfill the requirements of the applications, many new methods and techniques have been proposed concerning the stabilization and amelioration of the diode laser, such as the external cavity diode laser (ECDL) and the tapered amplifier. With the development of cold atom physics, high-accuracy applications such as the cold atom clock and the cold atom interferometer arised. These applications call for higher requirements of the laser frequency stabilization, narrow linewidth, phase stabilization and other properties. We are engaged in the work of the frequency and phase stabilization of the diode laser and its application in atomic optics on this background.In chapter 1, a brief description on the configuration, principle and operational features of the diode laser is given. Then we introduce the development and recent situation of atomic optics, and describe the development, present situation and application prospects of the cold atom interferometer, which is very popular in atomic optics.The diode laser is widely used in the field of atomic optics. As a result, we discuss the necessity of frequency and phase stabilization of the diode laser in atomic optics and other fields at last.In chapter 2, the theoretical basis, working principle, and configuration of the cold atom interferometer is introduced in detail. Subsequently a thorough description is given about the cold atom interferometer we constructing at present, including its experimental schemes, design and progress situation. The vacuum system, the two dimensional and three dimensional Magneto-Optical-Trap (MOT) for the laser cooling and trapping, and the electronics are given special emphasis.In chapter 3, aiming at the cold atom interferometer, some importent technical requirements are proposed for the laser system. Based on these requirements, we designe the laser system for the the cold atom interferometer. Some existing methods and techniques are analysed. In order to overcome the shortcomings of the existing methods and techniques, some improvements and innovations are made. The laser system including the frequency stabilization, the phase stabilization, the frequency shift, the frequency tuning of the laser and the related equipments is described, especially our improvements and innovations.In chapter 4, we set up the experiment, and test the experimental configuration. The first results are obtained and the data are analysed. We evaluate concretely whether the experimental configuration fulfill the requirements of the cold atom interferometer and propose improvement corresponding the part that can not fulfil the requirements completely.In chapter 5, a summary of the work achieved in this thesis and a outlook is given.