Broadband Terahertz Frequency Comb Based on Actively Mode Locked Resonant Tunneling Diode
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arXiv
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| Auteurs principaux: | , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866910951594262528 |
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| author | Han, Feifan Zhou, Hongxin Zhang, Qun Huang, Zebin Zou, Longhao Li, Weichao Jiang, Fan Duan, Jingpu Zhou, Jianer Yu, Xiongbin Gao, Zhen Tao, Xiaofeng |
| author_facet | Han, Feifan Zhou, Hongxin Zhang, Qun Huang, Zebin Zou, Longhao Li, Weichao Jiang, Fan Duan, Jingpu Zhou, Jianer Yu, Xiongbin Gao, Zhen Tao, Xiaofeng |
| contents | The frequency combs characterized by their phase-coherent equidistant spectral modes and precise frequency scales of broadband spectrum, have made them an indispensable part of contemporary physics. A terahertz (THz) frequency comb is a key asset for THz technology applications in spectroscopy, metrology, communications, and sensing. However, the THz frequency comb technologies are comparatively underdeveloped compared to the optical frequency domain, primarily attributed to the deficiency of advanced THz generation components. In this paper, we innovatively demonstrate a compact THz frequency comb source based on a resonant tunneling diode (RTD) through active mode locking technique. By injecting a strong continuous-wave radio frequency (RF) signal via the bias line into a RTD oscillator integrated within a WR-5 hollow metallic waveguide package, we observe a broadband comb spectrum spanning from 140 to 325 GHz. The mode spacing is directly determined by the frequency of the injected RF signal, providing a wide tuning range of approximately 40 GHz. We also employ the proposed frequency comb source as the local oscillator in a coherent transmitter. In particular, this is the first all-electrical compact THz frequency comb source, and the transmission demonstration paves the way to next-generation communication. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_12464 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Broadband Terahertz Frequency Comb Based on Actively Mode Locked Resonant Tunneling Diode Han, Feifan Zhou, Hongxin Zhang, Qun Huang, Zebin Zou, Longhao Li, Weichao Jiang, Fan Duan, Jingpu Zhou, Jianer Yu, Xiongbin Gao, Zhen Tao, Xiaofeng Applied Physics Optics The frequency combs characterized by their phase-coherent equidistant spectral modes and precise frequency scales of broadband spectrum, have made them an indispensable part of contemporary physics. A terahertz (THz) frequency comb is a key asset for THz technology applications in spectroscopy, metrology, communications, and sensing. However, the THz frequency comb technologies are comparatively underdeveloped compared to the optical frequency domain, primarily attributed to the deficiency of advanced THz generation components. In this paper, we innovatively demonstrate a compact THz frequency comb source based on a resonant tunneling diode (RTD) through active mode locking technique. By injecting a strong continuous-wave radio frequency (RF) signal via the bias line into a RTD oscillator integrated within a WR-5 hollow metallic waveguide package, we observe a broadband comb spectrum spanning from 140 to 325 GHz. The mode spacing is directly determined by the frequency of the injected RF signal, providing a wide tuning range of approximately 40 GHz. We also employ the proposed frequency comb source as the local oscillator in a coherent transmitter. In particular, this is the first all-electrical compact THz frequency comb source, and the transmission demonstration paves the way to next-generation communication. |
| title | Broadband Terahertz Frequency Comb Based on Actively Mode Locked Resonant Tunneling Diode |
| topic | Applied Physics Optics |
| url | https://arxiv.org/abs/2505.12464 |