Low-loss, fabrication-tolerant, and highly-tunable Sagnac loop reflectors and Fabry-Pérot cavities on thin-film lithium niobate
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arXiv
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| Autores principales: | , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866915312569417728 |
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| author | Qi, Luke Khalatpour, Ali Herrmann, Jason Park, Taewon Dean, Devin Robison, Sam Hwang, Alexander Stokowski, Hubert Serkland, Darwin Fejer, Martin Safavi-Naeini, Amir H. |
| author_facet | Qi, Luke Khalatpour, Ali Herrmann, Jason Park, Taewon Dean, Devin Robison, Sam Hwang, Alexander Stokowski, Hubert Serkland, Darwin Fejer, Martin Safavi-Naeini, Amir H. |
| contents | We present low-loss ($<1.5\%$) and power-efficient Mach-Zehnder interferometers (MZIs) on thin-film lithium niobate. To accurately measure low MZI losses, we develop a self-calibrated method using tunable Sagnac loop reflectors (SLRs) to build cavities. Fabry-Pérot cavities constructed from these fabrication-tolerant SLRs achieve an intrinsic quality factor of $2 \times 10^6$. By implementing thermal isolation trenches, we also demonstrate a $>10\times$ reduction in power consumption for thermo-optic phase shifters, achieving a $π$-phase shift ($P_π$) with just 2.5 mW. These tunable and efficient components are key for scaling up to complex photonic integrated circuits. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_23411 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Low-loss, fabrication-tolerant, and highly-tunable Sagnac loop reflectors and Fabry-Pérot cavities on thin-film lithium niobate Qi, Luke Khalatpour, Ali Herrmann, Jason Park, Taewon Dean, Devin Robison, Sam Hwang, Alexander Stokowski, Hubert Serkland, Darwin Fejer, Martin Safavi-Naeini, Amir H. Optics Applied Physics We present low-loss ($<1.5\%$) and power-efficient Mach-Zehnder interferometers (MZIs) on thin-film lithium niobate. To accurately measure low MZI losses, we develop a self-calibrated method using tunable Sagnac loop reflectors (SLRs) to build cavities. Fabry-Pérot cavities constructed from these fabrication-tolerant SLRs achieve an intrinsic quality factor of $2 \times 10^6$. By implementing thermal isolation trenches, we also demonstrate a $>10\times$ reduction in power consumption for thermo-optic phase shifters, achieving a $π$-phase shift ($P_π$) with just 2.5 mW. These tunable and efficient components are key for scaling up to complex photonic integrated circuits. |
| title | Low-loss, fabrication-tolerant, and highly-tunable Sagnac loop reflectors and Fabry-Pérot cavities on thin-film lithium niobate |
| topic | Optics Applied Physics |
| url | https://arxiv.org/abs/2505.23411 |