A passive optical system is proposed to explore the intensity quantum corre
lation of two twin beams to reduce the photon noise of one of them. It cons
ists of using a semiconductor medium inside an optical cavity, which behave
s as a nonlinear medium presenting a crossed Kerr effect. The intensity flu
ctuations of one beam modify the resonance condition of the cavity for the
other beam and therefore its intensity. The medium is described microscopic
ally within the two-level atom model. It is shown that, under typical exper
imental conditions, this system may produce noise reduction.