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