Generation Of Raman Beams By Injection-locking Of Extended-cavity Semiconductor Laser

It is a novel technology of measurement based on atom interferometry. By stimulated Raman transition, many physical quantities such as gravity, gravity gradient, rotation rate and the Gravitational Constant can be measured with high precision. Generation of Raman pulses is a key work in atom interferometry, which is done by phase locking of lasers. In this thesis, the development history of atom interferometry was described. The gravity measurement of atom interferometry by the work of Raman pulses was studied by quantum theory. Also we introduced several methods of optical phase locking. We studied the specialties and drawbacks of these methods, proposed our method and described our work in detail, which includes the performance of extended-cavity diode laser and optical system of Raman pulse. Finally we analyzed our experimental results in detail, including the spectrum of the beat signal and the measurement of the phase coherence, a comparison with a traditional method of optical phase locking and the rising and the test results of optical switch.