Simultaneous Type-0 and Type-I Optical Parametric Oscillation in Submicron Poled Thin-Film Lithium Niobate
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arXiv
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| Hauptverfasser: | , |
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| Format: | Preprint |
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2026
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| _version_ | 1866913159288193024 |
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| author | Yang, Fengyan Tang, Hong X. |
| author_facet | Yang, Fengyan Tang, Hong X. |
| contents | We demonstrate dual optical parametric oscillations in a thin-film lithium niobate microring resonator enabled by polarization-insensitive submicron periodic poling. Under degenerate backward quasi-phase matching, the counter-propagating signal and idler wavevectors cancel, such that the phase-matching condition is determined solely by the pump wavevector. As a result, a single submicron poling period simultaneously supports both Type-0 (TM $\rightarrow$ TM + TM) and Type-I (TM $\rightarrow$ TE + TE) parametric interactions in the same device. Temperature-controlled resonance alignment further enables selective activation of either polarization channel. We observe optical parametric oscillation with thresholds of 290\,{\textmu}W for the Type-0 process and 3\,mW for the Type-I process, both comparable to state-of-the-art on-chip OPO thresholds. These results establish submicron poled TFLN as a compact and reconfigurable platform for polarization-diverse parametric light generation. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_24589 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Simultaneous Type-0 and Type-I Optical Parametric Oscillation in Submicron Poled Thin-Film Lithium Niobate Yang, Fengyan Tang, Hong X. Optics We demonstrate dual optical parametric oscillations in a thin-film lithium niobate microring resonator enabled by polarization-insensitive submicron periodic poling. Under degenerate backward quasi-phase matching, the counter-propagating signal and idler wavevectors cancel, such that the phase-matching condition is determined solely by the pump wavevector. As a result, a single submicron poling period simultaneously supports both Type-0 (TM $\rightarrow$ TM + TM) and Type-I (TM $\rightarrow$ TE + TE) parametric interactions in the same device. Temperature-controlled resonance alignment further enables selective activation of either polarization channel. We observe optical parametric oscillation with thresholds of 290\,{\textmu}W for the Type-0 process and 3\,mW for the Type-I process, both comparable to state-of-the-art on-chip OPO thresholds. These results establish submicron poled TFLN as a compact and reconfigurable platform for polarization-diverse parametric light generation. |
| title | Simultaneous Type-0 and Type-I Optical Parametric Oscillation in Submicron Poled Thin-Film Lithium Niobate |
| topic | Optics |
| url | https://arxiv.org/abs/2605.24589 |