Phase-stabilised self-injection-locked microcomb
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866913469448585216 |
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| author | Wildi, Thibault Ulanov, Alexander E. Voumard, Thibault Ruhnke, Bastian Herr, Tobias |
| author_facet | Wildi, Thibault Ulanov, Alexander E. Voumard, Thibault Ruhnke, Bastian Herr, Tobias |
| contents | Microresonator frequency combs (microcombs) hold great potential for precision metrology within a compact form factor, impacting a wide range of applications such as point-of-care diagnostics, environmental monitoring, time-keeping, navigation and astronomy. Through the principle of self-injection locking, electrically-driven chip-based microcombs with minimal complexity are now feasible. However, phase-stabilisation of such self-injection-locked microcombs, a prerequisite for metrological frequency comb, has not yet been attained. Here, we address this critical need by demonstrating full phase-stabilisation of a self-injection-locked microcomb. The microresonator is implemented in a silicon nitride photonic chip, and by controlling a pump laser diode and a microheater with low voltage signals (less than 1.5 V), we achieve independent control of the comb's offset and repetition rate frequencies. Both actuators reach a bandwidth of over 100 kHz, enabling phase-locking of the microcomb to external frequency references. These results establish photonic chip-based, self-injection-locked microcombs as low-complexity yet versatile sources for coherent precision metrology in emerging applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_10160 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Phase-stabilised self-injection-locked microcomb Wildi, Thibault Ulanov, Alexander E. Voumard, Thibault Ruhnke, Bastian Herr, Tobias Optics Applied Physics Microresonator frequency combs (microcombs) hold great potential for precision metrology within a compact form factor, impacting a wide range of applications such as point-of-care diagnostics, environmental monitoring, time-keeping, navigation and astronomy. Through the principle of self-injection locking, electrically-driven chip-based microcombs with minimal complexity are now feasible. However, phase-stabilisation of such self-injection-locked microcombs, a prerequisite for metrological frequency comb, has not yet been attained. Here, we address this critical need by demonstrating full phase-stabilisation of a self-injection-locked microcomb. The microresonator is implemented in a silicon nitride photonic chip, and by controlling a pump laser diode and a microheater with low voltage signals (less than 1.5 V), we achieve independent control of the comb's offset and repetition rate frequencies. Both actuators reach a bandwidth of over 100 kHz, enabling phase-locking of the microcomb to external frequency references. These results establish photonic chip-based, self-injection-locked microcombs as low-complexity yet versatile sources for coherent precision metrology in emerging applications. |
| title | Phase-stabilised self-injection-locked microcomb |
| topic | Optics Applied Physics |
| url | https://arxiv.org/abs/2401.10160 |