Optimization of Polarization Self-Rotation Squeezing in Rubidium Vaporvia Spatial Optimization of the Pump Beam

High precision optical detection is fundamentally limited by quantum noise. Such limits can be bypassed with the use of squeezed states of light with modified quantum noise. We study squeezed states of light, with a focus on optimization of squeezing generated via polarization self-rotation (PSR) in hot Rubidium vapor. The goal of our research is to reduce quantum noise by optimizing various experimental parameters, such as cell temperature and focusing parameters of the input pump field. After such preliminary optimization, we found that the squeezing level is optimal for the temperature of Rb vapor of 69-70°C, reaching quantum noise suppression around 2.3 ± 0.10 dB below shot noise. Currently, we focus on optimization of the spatial intensity and phase profile of the pump field, using complex amplitude and phase cluster masks.