On-Chip Erbium-Doped Tantalum Oxide Microring Hybrid Cavity Single-Mode Laser
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arXiv
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| Autori principali: | , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866910007444897792 |
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| author | Shui, Like Yi, Ruixuan Zhao, Chenyang Lu, Jinlong Zhang, Xiaotong Zhang, Jiaqiao Gan, Xuetao |
| author_facet | Shui, Like Yi, Ruixuan Zhao, Chenyang Lu, Jinlong Zhang, Xiaotong Zhang, Jiaqiao Gan, Xuetao |
| contents | We demonstrate a high-performance, single-mode Er:Ta2O5 microring laser monolithically integrated on a silicon platform via a customized Damascene process. The Er:Ta2O5 gain medium exhibits a low propagation loss of 0.73 dB/cm and a high intrinsic Q-factor of 5.03 x 105. By utilizing a hybrid cavity_consisting of a microring coupled to a U-shaped waveguide at two symmetric points_we exploit the Vernier effect to achieve robust longitudinal mode selection. Under a non-resonant 1480 nm pumping scheme, the laser yields a side_mode suppression ratio (SMSR) of 53.3 dB and a narrow linewidth of 9.5 pm. A slope efficiency of 2.76 % is achieved_the highest reported to date for Er:Ta2O5 lasers_with a lasing threshold of 3.3 mW. Furthermore, stable single-mode tuning is demonstrated across a temperature range of 18_68 celsius, consistently aligning with theoretical transfer matrix models. This work provides a scalable pathway for high-efficiency, tunable on-chip light sources, bridging the gap for monolithic active-passive integration on the tantalum oxide photonic platform. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_00695 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | On-Chip Erbium-Doped Tantalum Oxide Microring Hybrid Cavity Single-Mode Laser Shui, Like Yi, Ruixuan Zhao, Chenyang Lu, Jinlong Zhang, Xiaotong Zhang, Jiaqiao Gan, Xuetao Optics We demonstrate a high-performance, single-mode Er:Ta2O5 microring laser monolithically integrated on a silicon platform via a customized Damascene process. The Er:Ta2O5 gain medium exhibits a low propagation loss of 0.73 dB/cm and a high intrinsic Q-factor of 5.03 x 105. By utilizing a hybrid cavity_consisting of a microring coupled to a U-shaped waveguide at two symmetric points_we exploit the Vernier effect to achieve robust longitudinal mode selection. Under a non-resonant 1480 nm pumping scheme, the laser yields a side_mode suppression ratio (SMSR) of 53.3 dB and a narrow linewidth of 9.5 pm. A slope efficiency of 2.76 % is achieved_the highest reported to date for Er:Ta2O5 lasers_with a lasing threshold of 3.3 mW. Furthermore, stable single-mode tuning is demonstrated across a temperature range of 18_68 celsius, consistently aligning with theoretical transfer matrix models. This work provides a scalable pathway for high-efficiency, tunable on-chip light sources, bridging the gap for monolithic active-passive integration on the tantalum oxide photonic platform. |
| title | On-Chip Erbium-Doped Tantalum Oxide Microring Hybrid Cavity Single-Mode Laser |
| topic | Optics |
| url | https://arxiv.org/abs/2602.00695 |