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-to-nonclassical-light conversion system driven by a 50-mW diode laser at 1080 nm. Quantum noise reduction of 4.3 dB (63%) in the intensity difference between the twin beams was successfully observed at the detection frequency of 3 MHz.
Cite
@article{arxiv.quant-ph/0406113,
title = {Generation of twin beams from an optical parametric oscillator pumped by a frequency-doubled diode laser},
author = {Kazuhiro Hayasaka and Yun Zhang and Katsuyuki Kasai},
journal= {arXiv preprint arXiv:quant-ph/0406113},
year = {2009}
}