Generation of squeezed light with monolithic optical parametric oscillator: Simultaneous achievement of phase matching and cavity resonance by temperature control

摘要

We generate squeezed state of light at 860 nm with a monolithic opticalparametric oscillator. The optical parametric oscillator consists of aperiodically poled KTiOPO_4 crystal, both ends of which are sphericallypolished and mirror-coated. We achieve both phase matching and cavity resonanceby controlling only the temperature of the crystal. We observe up to -8.0 dB ofsqueezing with the bandwidth of 142 MHz. Our technique makes it possible todrive many monolithic cavities simultaneously by a single laser. Hence ourmonolithic optical parametric oscillator is quite suitable tocontinuous-variable quantum information experiments where we need a largenumber of highly squeezed light beams.