Fig. 1. Configuration of the squeezed state generation. FI, Faraday isolator; MC, mode cleaner; SHG, second harmonic generation; OPO, optical parametric oscillator; OPA, optical parametric amplifier; PBS, polarization beam splitter; DBS, dichroic beam splitter; EOM, electro-optical modulator; EOAM, electro-optic amplitude modulator; PZT, piezoelectric transducer; PD, photodetector; BHD, balanced homodyne detection; SHD: self-homodyne detection.

Fig. 2. Experimental results of the white noise direct output from the function generator and quadrature amplitude variances, with frequency for different pump beam noises, which are measured with the self-homodyne method. Case (a), without amplitude modulation; an amplitude modulation of 400 mV for case (b), 800 mV for case (c), and 1600 mV for case (d). RBW: 300 kHz and VBW: 200 Hz.

Fig. 3. Experimental results of the amplitude squeezed quadrature noise with the variation of pump intensity noise at the Fourier frequency from 2 MHz to 30 MHz. RBW: 300 kHz and VBW: 200 Hz.