Frequency-tunable all-optical broadband measurement of quadrature squeezing by controlling the phase-matching condition of an optical parametric amplifier

Abstract

We propose frequency-tunable measurement of quadrature squeezing from DC to 10-THz sideband frequencies using a gain-spectrum-shaped optical parametric amplifier. 4.3-dB squeezing at a 10-THz sideband frequency is successfully demonstrated by using periodically poled LiNbO3 waveguides.