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Generation of bright squeezed light at 1.06 $μm$ using cascaded non-linearities in a triply resonant c.w. PPLN OPO

K. S. Zhang·T. Coudreau·M. Martinelli·A. Maitre·C. Fabre
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Abstract

We have used an ultra-low threshold continuous-wave Optical Parametric Oscillator (OPO) to reduce the quantum fluctuations of the reflected pump beam below the shot noise limit. The OPO consisted of a triply resonant cavity containing a Periodically-Poled Lithium Niobate crystal pumped by a Nd:YAG laser and giving signal and idler wavelengths close to 2.12 microns and a threshold as low as 300 microwatts. We detected the quantum fluctuations of the pump beam reflected by the OPO using a slightly modified homodyne detection technique. The measured noise reduction was 30 % (inferred noise reduction at the output of the OPO 38 %).

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K. S. Zhang, T. Coudreau, M. Martinelli, A. Maitre, C. Fabre. 2001-05-30. Generation of bright squeezed light at 1.06 $μm$ using cascaded non-linearities in a triply resonant c.w. PPLN OPO. https://arxiv.org/abs/quant-ph/0105148

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