Filtered Injection Locking for Large Atomic Interferometry

Many experiments in atomic physics require two laser beams with a controllable difference in frequencies. In this thesis, I report on realizing this goal using a technique where an electro-optic modulator sideband is filtered through a cavity and injected into a diode laser, in a novel configuration yielding very high feedback isolation without sacrificing access to the output power of the diode laser. The advantages of this approach over alternative techniques for injection locking are discussed. I explain how this injection locking technique is being used in the construction of a large angle atomic interferometer based on a novel Raman pulse beam splitting technique. After theoretically deriving a Raman transition from basics quantum mechanics, an explanation of Raman pulse beam splitting is given. Our experimental setup and experimental results are discussed. Finally, experiments that we have performed, including magnetic sublevel optical pumping and a Ramsey fringe experiment, along with their results are presented. Thesis Supervisor: Selim Shahriar Title: Research Scientist