Reservoir-engineered squeezed lasing through the parametric coupling

TL;DR

This paper demonstrates the first experimental squeezed laser using reservoir engineering in an optical parametric oscillator, achieving high brightness and narrow linewidth with preserved quantum properties.

Contribution

It introduces a novel reservoir-engineered approach to generate squeezed lasing, enhancing parametric interaction and suppressing decoherence in an optical parametric oscillator.

Findings

Achieved -6.1 dB squeezed laser output.

Enhanced parametric interaction via squeezing injection.

Preserved coherence and quantum properties in lasing.

Abstract

We report the first experimental demonstration of squeezed lasing in a reservoir-engineered optical parametric oscillator (OPO). The OPO provides a basis of squeezed states and parametric amplification in lasing emission, whose vacuum reservoir is coupled to a squeezed vacuum generated by a second OPO. With a precisely controlled squeezing angle and strong squeezing injection, the parametric interaction in the first OPO is exponentially enhanced. It successfully circumvents the decoherence in the system, and eliminates the undesired noise of spontaneous photon emission in the OPO. As a result, the amplified parametric process simultaneously reserves the coherence and quantum properties in the first OPO, and yields a -6.1 dB squeezed laser in optical domain with a narrow linewidth and high brightness. Our work sheds light on potential applications of squeezed lasing in quantum metrology and quantum optics.