K. Kasai et C. Fabre, SQUEEZING OF THE PUMP BEAM IN OPTICAL PARAMETRIC INTERACTION, Journal of nonlinear optical physics and materials, 5(4), 1996, pp. 921-927
We investigate the squeezing of the pump beam in optical parametric in
teraction. According to our semi-classical calculation, the pump beam
reflected back from a Triply Resonant Optical Parametric Oscillator (T
ROPO) is squeezed.(1) In this paper we preliminarily demonstrate the s
queezing of the pump beam by using a semimonoclithic KTP TROPO pumped
by a frequency doubled LD-pumped YAG laser. Noise reduction of 1.2 dB
below the shot noise level is observed in the bistable region of the p
arametric oscillation.