Microcomb-referenced photonic stabilization of resonant tunneling diode terahertz oscillators
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arXiv
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| Autori principali: | , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| Soggetti: | |
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| _version_ | 1866909976950210560 |
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| author | Talara, Miezel Tokizane, Yu Mori, Tatsunoshin Shikata, Ryota Higaki, Masayuki Hase, Eiji Morohashi, Isao Suzuki, Safumi Kuse, Naoya Yasui, Takeshi |
| author_facet | Talara, Miezel Tokizane, Yu Mori, Tatsunoshin Shikata, Ryota Higaki, Masayuki Hase, Eiji Morohashi, Isao Suzuki, Safumi Kuse, Naoya Yasui, Takeshi |
| contents | We demonstrate a compact stabilization scheme for terahertz (THz) sources by exploiting the complementary advantages of microresonator-based optical frequency combs (microcombs) and resonant tunneling diodes (RTDs). A microcomb-driven photomixing THz signal is employed as the master for injection locking of an RTD, enabling faithful transfer of the microcomb stability into the RTD. Using this approach, the free-running RTD linewidth of 50 MHz was narrowed to 165 Hz, while the single-sideband phase noise reached -80 dBc/Hz at a 10 kHz offset with a locking range of 80 MHz. Compared with conventional electronic frequency multiplier or fiber-comb-based schemes, this method avoids high-order frequency multiplication and associated noise penalties, offering a compact and practical alternative. The dual functionality of linewidth narrowing and power scalability highlights the potential of microcomb-assisted injection locking as a route toward chip-scale, spectrally pure THz sources for beyond-5G/6G wireless communication and radar, with prospects for future extension to time-frequency metrology and precision sensing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_22752 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Microcomb-referenced photonic stabilization of resonant tunneling diode terahertz oscillators Talara, Miezel Tokizane, Yu Mori, Tatsunoshin Shikata, Ryota Higaki, Masayuki Hase, Eiji Morohashi, Isao Suzuki, Safumi Kuse, Naoya Yasui, Takeshi Optics We demonstrate a compact stabilization scheme for terahertz (THz) sources by exploiting the complementary advantages of microresonator-based optical frequency combs (microcombs) and resonant tunneling diodes (RTDs). A microcomb-driven photomixing THz signal is employed as the master for injection locking of an RTD, enabling faithful transfer of the microcomb stability into the RTD. Using this approach, the free-running RTD linewidth of 50 MHz was narrowed to 165 Hz, while the single-sideband phase noise reached -80 dBc/Hz at a 10 kHz offset with a locking range of 80 MHz. Compared with conventional electronic frequency multiplier or fiber-comb-based schemes, this method avoids high-order frequency multiplication and associated noise penalties, offering a compact and practical alternative. The dual functionality of linewidth narrowing and power scalability highlights the potential of microcomb-assisted injection locking as a route toward chip-scale, spectrally pure THz sources for beyond-5G/6G wireless communication and radar, with prospects for future extension to time-frequency metrology and precision sensing. |
| title | Microcomb-referenced photonic stabilization of resonant tunneling diode terahertz oscillators |
| topic | Optics |
| url | https://arxiv.org/abs/2512.22752 |