The data of the article"Quantum-enhanced optical precision measurement assisted by low-frequency squeezed vacuum states"

The data related to the article "Quantum-enhanced optical precision measurement assisted by low-frequency squeezed vacuum states" was published in the journal of Chinese Physics B. It contains an Excel file, which is described below:The phase and amplitude modulation measurement based on fiber structure for sensitivity beyond the SNL are studied in the article, including measured noise power of the quadrature-phase and quadrature-amplitude squeezed vacuum states; the phase modulation measurements; the amplitude modulation measurements; the shot noise reduction for measured amplitude modulation. The data were obtained by spectrum analyzer and drawn by Oringin.