We examine experimentally photocurrent noise reduction in the opto-electronic closed loop. Photocurrent noise density 12.5 dB below the shot-noise was observed. So large suppression was not reached in previous experiments and cannot be explained in terms of an ordinary sub-Poissonian light in the loop. We propose the concept of anticorrelation state for the description of light in the loop.
Document ID: 19950007511. Accession ID: 95N13924. NASA. Goddard Space Flight Center, Third International Workshop on Squeezed States and Uncertainty Relations; p 213-218.