Optical Phase Lock Loop For Atom Inteferometry

Abstract

Atom based gravimeter is one of the prominent candidates to measure the local acceleration due to gravity. There are two types of atom bases gravimeter, Cold atom-based gravimeter, and the Bose-Einstein-Condensate(BEC) gravimeter. Gravimeter works on the principle of the diffraction of atomic cloud by optical grating. The noise in gravimeter depends on many factors out of which one is the phase noise in optical gratings caused by acoustic vibrations. The lower the noise better the precision. In this thesis we implement the Optical Phase Lock Loop(OPLL) to reduce the acoustic phase noise and the instrumentation for the optical phase lock loop is shown. The setup’s primary goal is to lock the phase of optical grating.