Low-coherence interferometry with undetected mid-infrared photons in the high-gain regime
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arXiv
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| Format: | Preprint |
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2025
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| _version_ | 1866908729324077056 |
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| author | Zotti, Giovanni Horoshko, Dmitri B. Kolobov, Mikhail I. Michael, Yoad Gefen, Ziv Chekhova, Maria V. Hashimoto, Kazuki |
| author_facet | Zotti, Giovanni Horoshko, Dmitri B. Kolobov, Mikhail I. Michael, Yoad Gefen, Ziv Chekhova, Maria V. Hashimoto, Kazuki |
| contents | We develop a high-parametric-gain SU(1,1) interferometer based on an aperiodically poled Potassium Titanyl Phosphate (apKTP) crystal, enabling frequency-domain low-coherence interferometry with undetected mid-infrared photons. The system achieves a signal-to-noise ratio as high as 40 dB and axial resolution of 30 $μ$m, with a 3 $μ$m-centered idler beam. By increasing the poling-period range, we also improve the axial resolution to 17 $μ$m, demonstrating a straightforward route to enhance the performance by working on the crystal design |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_03349 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Low-coherence interferometry with undetected mid-infrared photons in the high-gain regime Zotti, Giovanni Horoshko, Dmitri B. Kolobov, Mikhail I. Michael, Yoad Gefen, Ziv Chekhova, Maria V. Hashimoto, Kazuki Optics Instrumentation and Detectors Quantum Physics We develop a high-parametric-gain SU(1,1) interferometer based on an aperiodically poled Potassium Titanyl Phosphate (apKTP) crystal, enabling frequency-domain low-coherence interferometry with undetected mid-infrared photons. The system achieves a signal-to-noise ratio as high as 40 dB and axial resolution of 30 $μ$m, with a 3 $μ$m-centered idler beam. By increasing the poling-period range, we also improve the axial resolution to 17 $μ$m, demonstrating a straightforward route to enhance the performance by working on the crystal design |
| title | Low-coherence interferometry with undetected mid-infrared photons in the high-gain regime |
| topic | Optics Instrumentation and Detectors Quantum Physics |
| url | https://arxiv.org/abs/2509.03349 |