G Hétet et al 2007 J. Phys. B: At. Mol. Opt. Phys. 40 221 doi:10.1088/0953-4075/40/1/020
G Hétet, O Glöckl, K A Pilypas, C C Harb, B C Buchler, H-A Bachor and P K Lam
Show affiliationsWe report on the generation of more than 5 dB of vacuum squeezed light at the rubidium D1 line (795 nm) using periodically poled KTiOPO4 (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.
42.50.Dv Quantum state engineering and measurements
32.80.-t Photoionization and excitation
42.50.Lc Quantum fluctuations, quantum noise, and quantum jumps
Issue 1 (14 January 2007)
Received 15 September 2006, in final form 10 November 2006
Published 20 December 2006
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