References

1

H. J. Kimble, M. Dagenais, and L. Mandel, Phys. Rev. Lett. 39 (1977) 691; F. Diedrich and H. Walther, Phys. Rev. Lett. 58 (1987) 203; M. Schubert, I. Siemers, R. Blatt, W. Neuhauser, and P.E. Toschek, Phys. Rev. Lett. 68 (1992) 3016.

2

T. Hirano and M. Matsuoka, Appl. Phys. B55 (1992) 233.

Figure Captions

Fig.1. Schematic drawing of experimental apparatus.

Fig.2. The number of recorded counts as a function of the time delay. The relative phase between the signal and the pump was chosen for (a) deamplification and (b) amplification.