Controlled Correlation and Squeezing in Pr3+ : Y2SiO5 to Yield Correlated Light Beams

We report the generation of twin beams by the parametric amplification four-wave mixing process and triplet beams by the parametric amplification six-wave mixing (PA SWM) process associated with the multiorder fluorescence signals in a Pr3+ : Y2SiO5 crystal. The intensity noise correlation and intensity-difference squeezing result from the nonlinear gain, which can be well controlled by the polarized dressing effect. The correlation value at the resonant position increases due to the double dressing effect; however, such correlation decreases if the triple dressing effect works. Specifically, correlation and squeezing between Stokes and anti-Stokes signals can be also switched by the relative nonlinear phase shift. The generated triplet beams from the PA SWM process have potential applications in three-mode all-optical information processing that can be used in on-chip photonic devices.