Creation and Measurement of Broadband Squeezed Vacuum from a Ring Optical Parametric Oscillator

Abstract

We report a 65MHz-bandwidth triangular-shaped optical parametric oscillator (OPO) for squeezed vacuum generation at 860nm. The triangle structure of our OPO enables the round-trip length to reach 45mm as a ring cavity, which provides a counter circulating optical path available for introducing a probe beam or generating another squeezed vacuum. Hence our OPO is suitable for the applications in high-speed quantum information processing where two or more squeezed vacua form a complicated interferometer, like continuous-variable quantum teleportation. With a homemade, broadband and low-loss homodyne detector, a direct measurement shows 8.4dB of squeezing at 3MHz and also 2.4dB of squeezing at 100MHz.

arXiv comment12 pages, 7 figures

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• Shortcuts to Adiabaticity for the Quantum Rabi Model: Efficient Generation of Giant Entangled cat States via Parametric Amplification
• Emission of photon pairs by mechanical stimulation of the squeezed vacuum
• Generation of highly pure Schrödinger's cat states and real-time quadrature measurements via optical filtering
• Squeezing-enhanced quantum key distribution over atmospheric channels
• Building a large-scale quantum computer with continuous-variable optical technologies
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• Quantum Nondemolition Gate Operations and Measurements in Real Time on Fluctuating Signals
• Squeezing enhanced atom-cavity interaction in coupled cavities with high dissipation rates
• Delayed transfer of entanglement to initially populated qubits
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• Fault-tolerant $H^{\infty }$ control for optical parametric oscillators with pumping fluctuations
• Quantum speed limit of a single atom in a squeezed optical cavity mode
• A Broadband Squeezed Light Source for Table-Top Interferometry