摘要
Noise squeezing of intensity difference between the pair of sum modes may be generated in a cascade laser of A and U quantum-beats.The best achievable squeezing is up to 50%below the shot noise limit.This new kind of squeezed lasers has potential for quantum communications and precision measurements.
基金
the National Natural Science Foundation of China under Grant No.69708001
the Natural Science Foundation of Hubei Province under Grant No.97J013.
