Squeezed light for bandwidth limited atom optics experiments at the   Rubidium D1 line
  We report on the generation of more than 5 dB of vacuum squeezed light at the Rubidium D1 line (795 nm) using periodically poled KTiOPO$_{4}$ (PPKTP) in an optical parametric oscillator. We demonstrate squeezing at low sideband frequencies, making this source of non-classical light compatible with bandwidth limited atom optics experiments. When PPKTP is operated as a parametric amplifier, we show a noise reduction of 4 dB stably locked within the 150 kHz-500 kHz frequency range. This matches the bandwidth of Electromagnetically Induced Transparency (EIT) in Rubidium hot vapour cells under the condition of large information delay. 
G. H\'etet, O. Gl\"ockl, K. A. Pilypas, C.C. Harb, B.C. Buchler, H.-A.   Bachor, P.K. Lam