Generation of a squeezed vacuum resonant on a rubidium D1 line with periodically poled KTiOPO4.

  title={Generation of a squeezed vacuum resonant on a rubidium D1 line with periodically poled KTiOPO4.},
  author={Takahito Tanimura and Daisuke Akamatsu and Yoshihiko Yokoi and Akira Furusawa and Mikio Kozuma},
  journal={Optics letters},
  volume={31 15},
We report the generation of a continuous-wave squeezed vacuum resonant on the Rb D1 line (795 nm) using periodically poled KTiOPO4 (PPKTP) crystals. With a frequency doubler and an optical parametric oscillator based on PPKTP crystals, we observed a squeezing level of -2.75+/-0.14 dB and an antisqueezing level of +7.00+/-0.13 dB. This system could be utilized for demonstrating storage and retrieval of the squeezed vacuum, which is important for the ultraprecise measurement of atomic spins as… 

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Phys. Rev. A

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