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Photonic Quantum Computing

Generation of 12 dB squeezed light from a waveguide optical parametric amplifier using a machine-learning-controlled spatial light modulator

arXiv
Authors: Gyeongmin Ha, Kazuki Hirota, Takahiro Kashiwazaki, Takumi Suzuki, Akito Kawasaki, Warit Asavanant, Mamoru Endo, Akira Furusawa

Year

2026

Paper ID

22437

Status

Preprint

Abstract Read

~2 min

Abstract Words

104

Citations

N/A

Abstract

We demonstrate the generation of 12.1 pm 0.2 dB squeezed light from a periodically poled lithium niobate (PPLN) waveguide optical parametric amplifier (OPA). While single-pass OPAs offer squeezed light with THz-order bandwidths, loss from spatial mode mismatch between the squeezed light and the local oscillator (LO) previously capped the squeezing level at sim10 dB [K. Hirota et al., Opt. Express 34, 7958 (2026)]. In this work, we minimize this loss by introducing a machine-learning-optimized spatial light modulator (SLM) in the path of the LO. Specifically, we employed a double-reflection configuration to increase the spatial degrees of freedom, and directly used the measured squeezing level as the optimization's objective function.

Why This Paper Matters

  • This paper contributes to the Photonic Quantum Computing research area in the Quantum Articles archive.
  • It adds a 2026 reference point for readers tracking recent quantum research.
  • We demonstrate the generation of 12.1 pm 0.2 dB squeezed light from a periodically poled lithium niobate (PPLN) waveguide optical parametric amplifier (OPA).

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2603.02744 [2] arXiv https://arxiv.org/abs/2603.02744 [3] Publisher https://arxiv.org/abs/2603.02744

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