dorsal/arxiv
View SchemaUltralow-noise microwave oscillator via optical frequency division with a co-self-injection-locked miniature Fabry-Perot reference
| Authors | Runlin Miao, Chao Zhou, Pan Han, Mingxin Yang, Xing Zou, Ke Wei, Ke Yin, Tian Jiang |
|---|---|
| Categories | |
| ArXiv ID | 2601.07319vv1 |
| URL | https://arxiv.org/abs/2601.07319 |
| License | http://creativecommons.org/licenses/by/4.0/ |
Abstract
Optical frequency division (OFD) provides the purest microwaves by down-converting the stability of optical cavity references. State-of-the-art references typically rely on electronic co-Pound-Drever-Hall locking to ultrahigh-Q microresonators-a complex approach that introduces servo bumps and increases footprint. Alternatively, optical co-self-injection-locking (co-SIL) offers inherent simplicity but is limited by the large thermo-refractive noise and confined mode volumes of integrated cavities. Here, we demonstrate a two-point OFD-based microwave oscillator that combines an ultrahigh-Q miniature Fabry-Perot cavity with optical co-SIL. Leveraging its low relative phase noise optical reference and combing with an integrated soliton microcomb, the system generates a microwave with phase noise of -147 dBc/Hz at 4 kHz offset (scaled to 10 GHz)-performance rivalling most electronically stabilized systems. This work marries the superior noise floor of ultrahigh-Q cavities with the simplicity of optical locking, providing a compact, cost-effective, and field-deployable path to pure microwaves for next-generation communications, radar and metrology.
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"abstract": "Optical frequency division (OFD) provides the purest microwaves by down-converting the stability of optical cavity references. State-of-the-art references typically rely on electronic co-Pound-Drever-Hall locking to ultrahigh-Q microresonators-a complex approach that introduces servo bumps and increases footprint. Alternatively, optical co-self-injection-locking (co-SIL) offers inherent simplicity but is limited by the large thermo-refractive noise and confined mode volumes of integrated cavities. Here, we demonstrate a two-point OFD-based microwave oscillator that combines an ultrahigh-Q miniature Fabry-Perot cavity with optical co-SIL. Leveraging its low relative phase noise optical reference and combing with an integrated soliton microcomb, the system generates a microwave with phase noise of -147 dBc/Hz at 4 kHz offset (scaled to 10 GHz)-performance rivalling most electronically stabilized systems. This work marries the superior noise floor of ultrahigh-Q cavities with the simplicity of optical locking, providing a compact, cost-effective, and field-deployable path to pure microwaves for next-generation communications, radar and metrology.",
"arxiv_id": "2601.07319",
"authors": [
"Runlin Miao",
"Chao Zhou",
"Pan Han",
"Mingxin Yang",
"Xing Zou",
"Ke Wei",
"Ke Yin",
"Tian Jiang"
],
"categories": [
"physics.optics"
],
"license": "http://creativecommons.org/licenses/by/4.0/",
"title": "Ultralow-noise microwave oscillator via optical frequency division with a co-self-injection-locked miniature Fabry-Perot reference",
"url": "https://arxiv.org/abs/2601.07319",
"version": "v1"
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