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Q: Fachverband Quantenoptik und Photonik

Q 48: Poster – Quantum Optics, Technologies, and Optomechanics

Q 48.25: Poster

Mittwoch, 12. März 2025, 17:00–19:00, Tent

Investigation of the role of pump noise on the generation of nonclassical light from optical parametric oscillators — •Sopio Bregadze, Roger A. Kögler, and Oliver Benson — Humboldt-Universität zu Berlin, Institut für Physik, Newtonstraße 15, 12489, Berlin, Germany

Photonic quantum technologies rely on nonclassical states of light, such as squeezed and Fock states. Optical parametric oscillators (OPOs) are widely used for the generation of such states, leveraging enhanced light-matter nonlinear interactions through optical feedback. A typical configuration consists of a bulk nonlinear medium place inside an optical cavity. In order to determine the OPO output state, the dynamics of an open quantum system must be analysed. Here, we numerically solve the equations of motion derived from a master equation formalism, and calculate the state covariance matrix. We present results for OPOs based on degenerated parametric down conversion operating below oscillation threshold. The impact of excess pump noise on the generated states is investigated, with focus on their squeezing levels and purity. The obtained results are compared with current experimental devices dedicated for the generation of single-mode vacuum squeezed states.

Keywords: Optical parametric oscillator; Squeezed states; Master equation formalism