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arXiv · 2603.26243

Noise modelling of waveguide based squeezed light sources

Erik Anders Torsten Svanberg·Daniel Voigt·Vaishali Adya
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Abstract

Squeezed states of light are used for precision metrology and quantum-enhanced measurements, with applications spanning communication and sensing. State-of-the-art squeezed-light sources typically rely on optical cavities to achieve high, usable levels of squeezing. Recently, waveguide-based squeezed-light sources have demonstrated significant improvements in achievable squeezing, with performance currently limited by fabrication-induced losses. In this work, we present a detailed analysis of waveguide-based squeezers, examining the effects of phase noise, multiple loss mechanisms, and fundamental light leakage seeding the squeezer. We further investigate a cascaded squeezer architecture, in which a second waveguide operates as a phase-sensitive amplifier to mitigate out-coupling and detection losses. Owing to their ease of integration, robustness to high pump powers, and low intrinsic phase noise, we propose waveguide-based squeezed-light sources as a promising alternative for quantum noise reduction in future gravitational wave detectors, such as the Einstein Telescope.

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Erik Anders Torsten Svanberg, Daniel Voigt, Vaishali Adya. 2026-03-27. Noise modelling of waveguide based squeezed light sources. https://doi.org/10.1088/1361-6382/ae7e36

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