Using ultrashort laser pulses, we have observed quadrature squeezing and parametric gain in quasi-phase-matched KTiOPO4 waveguides. Using a local oscillator pulse that is 2.5 times shorter than the squeezed pulse, we observed noise reduction of 12 ± 1% below the shot-noise level. Parametric amplification and deamplification of a coherent seed pulse have also been observed, with no indication of gain-induced diffraction.
© 1995 Optical Society of America
Original Manuscript: October 31, 1994
Published: March 15, 1995
Matthew E. Anderson, J. D. Bierlein, M. Beck, and M. G. Raymer, "Quadrature squeezing with ultrashort pulses in nonlinear-optical waveguides," Opt. Lett. 20, 620-622 (1995)