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Generation of twin beams from an optical parametric oscillator pumped Kazuhiro Hayasaka, Yun Zhang, Katsuyuki Kasai Quantum-correlated twin beams were generated from a triply resonant optical parametric oscillator with an a -cut KTP crystal pumped by a frequency-doubled diode laser. A total output of 5.1 mW was obtained in the classical|nonclassical light-conversion system driven by a 50-mW diode laser at 1080 nm. A quantum-noise reduction of 4.3dB (63%) in the intensity difference between the twin beams was successfully observed at the detection frequency of 3 MHz. doi:10.1364/OL.29.001665 |