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.
© 2005 Optical Society of America
T. Hirano, K. Kotani, T. Ishibashi, S. Okude, and T. Kuwamoto, "3 dB squeezing by single-pass parametric amplification in a periodically poled KTiOPO4 crystal," Opt. Lett. 30, 1722-1724 (2005)