3 dB squeezing by single-pass parametric amplification in a periodically poled KTiOPO4 crystal.
We present the experimental observation of pulsed squeezed light from a degenerate optical parametric amplifier pumped by a second harmonic of a continuous-wave mode-locked Nd:YVO4 laser. With a single pass through a 10 mm long periodically poled KTiOPO4 crystal, the classical parametric gain of 11 is observed. The measured noise reduction in the quiet quadrature is 3.2 dB below the shot-noise level.
Hirano
T
T
Department of Physics, Gokushuin University, Toshima-ku, Tokyo 171-8588, Japan. Takuya.Hirano@gakushuin.ac.jp
Kotani
K
K
Ishibashi
T
T
Okude
S
S
Kuwamoto
T
T