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Generation of frequency-tunable twin beams and its application in sub-shot-noise FM spectroscopy

机译：可调频双光束的产生及其在亚散粒FM光谱学中的应用

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Widely frequency-tunable quantum-correlated twin beams have been experimentally demonstrated. The noise of the intensity difference between the signal and idler beams of the twin beams is reduced to more than 3 dB below the shot noise limit (SNL) throughout a wavelength-tuning range of 5.6 nm. A continuously frequency-tuning range of 2.8 GHz appears around the center wavelength of 1041.506 nm, where the maximum noise reduction of about 5.3 dB is observed. The tunable twin beams are used in frequency modulation (FM) spectroscopy of Cs-2 molecules and a spectrum with a sensitivity of about 4 dB beyond that of the SNL is obtained. [References: 17]
机译：已经通过实验证明了与频率可调谐的量子相关的双光束。在整个5.6 nm的波长调谐范围内，双光束的信号光束和闲置光束之间的强度差噪声降低到散粒噪声限制（SNL）以下3 dB以上。在中心波长1041.506 nm附近出现了2.8 GHz的连续频率调谐范围，在该中心波长处观察到最大噪声降低约为5.3 dB。可调谐双光束用于Cs-2分子的调频（FM）光谱中，并获得了比SNL灵敏度高约4 dB的光谱。 [参考：17]

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