BRIGHT SQUEEZED-LIGHT FROM A SINGLY RESONANT-FREQUENCY DOUBLER

We present a new technique for the efficient and simple production of amplitude-squeezed light with high coherent excitation, using a freque ncy doubler, in which only the fundamental wave is resonantly enhanced . Our theory predicts up to nearly 90% squeezing in the second-harmoni c wave under ideal conditions. In our first experiment we measured up to 30% squeezing [having taken into account the limited quantum effici ency (63%) of our detection system] in a stable 50 mW beam. Compared t o doubly resonant frequency doubling our new approach has considerable technical advantages.