Generation of 12 dB squeezed light from a waveguide optical parametric amplifier using a machine-learning-controlled spatial light modulator
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866911481955614720 |
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| author | Ha, Gyeongmin Hirota, Kazuki Kashiwazaki, Takahiro Suzuki, Takumi Kawasaki, Akito Asavanant, Warit Endo, Mamoru Furusawa, Akira |
| author_facet | Ha, Gyeongmin Hirota, Kazuki Kashiwazaki, Takahiro Suzuki, Takumi Kawasaki, Akito Asavanant, Warit Endo, Mamoru Furusawa, Akira |
| contents | 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 $\sim$10 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_02744 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Generation of 12 dB squeezed light from a waveguide optical parametric amplifier using a machine-learning-controlled spatial light modulator Ha, Gyeongmin Hirota, Kazuki Kashiwazaki, Takahiro Suzuki, Takumi Kawasaki, Akito Asavanant, Warit Endo, Mamoru Furusawa, Akira Quantum Physics 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 $\sim$10 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. |
| title | Generation of 12 dB squeezed light from a waveguide optical parametric amplifier using a machine-learning-controlled spatial light modulator |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2603.02744 |