Abstract

We experimentally demonstrated the quantum anticorrelation between fundamental $\left(1064\mathrm{nm}\right)$ and second-harmonic $\left(532\mathrm{nm}\right)$ fields in an external cavity-enhanced singly resonant periodically poled KTP (PPKTP) frequency doubler. Fundamental amplitude squeezing of $0.5\mathrm{dB}$ and second-harmonic amplitude squeezing of $0.3\mathrm{dB}$ were generated simultaneously at a pump power of $6.1\mathrm{mW}$. Meanwhile, quantum anticorrelation of $0.64\mathrm{dB}$ between the squeezed fundamental and the second-harmonic fields was observed.

© 2007 Optical Society of America

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