Chip-scale modulation-free laser stabilization using vacuum-gap micro-Fabry-Pérot cavity
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arXiv
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866909868260065280 |
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| author | Idjadi, Mohamad Hossein Cheng, Haotian Ashtiani, Farshid Li, Benjia Kim, Kwangwoong Jin, Naijun Quinlan, Franklyn Rakich, Peter T. |
| author_facet | Idjadi, Mohamad Hossein Cheng, Haotian Ashtiani, Farshid Li, Benjia Kim, Kwangwoong Jin, Naijun Quinlan, Franklyn Rakich, Peter T. |
| contents | Narrow-linewidth lasers are vital for a broad range of scientific and technological applications, including atomic clocks and precision sensing. Achieving high frequency stability is often as critical as ensuring scalability, portability, and cost-effectiveness in the development of low noise laser systems. Conventional electro-optic stabilization techniques, such as Pound-Drever-Hall locking to ultra-high-finesse resonators held in a vacuum chamber, provide excellent performance but remain challenging to scale. Here, we propose and experimentally demonstrate a cavity-coupled interferometric laser stabilization technique implemented on a silicon photonic chip and integrated with a compact, scalable micro-Fabry-Pérot cavity. The vacuum-gap optical cavity operates in air, achieving a quality factor of approximately $2.0\times 10^9$ and a fractional frequency instability of $1.45\times 10^{-12}$ at one-second averaging time. Integration of the proposed technique with the compact cavity yields more than 38-fold reduction in the laser's integrated linewidth and nearly three orders of magnitude suppression of frequency noise at 10 Hz offset frequency. The hybrid-integration of the proposed photonic chip with the micro-Fabry-Pérot cavity establishes a scalable and portable route toward chip-integrated ultra-stable lasers, paving the way for precision optical systems deployable beyond laboratory environments. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_21565 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Chip-scale modulation-free laser stabilization using vacuum-gap micro-Fabry-Pérot cavity Idjadi, Mohamad Hossein Cheng, Haotian Ashtiani, Farshid Li, Benjia Kim, Kwangwoong Jin, Naijun Quinlan, Franklyn Rakich, Peter T. Optics Narrow-linewidth lasers are vital for a broad range of scientific and technological applications, including atomic clocks and precision sensing. Achieving high frequency stability is often as critical as ensuring scalability, portability, and cost-effectiveness in the development of low noise laser systems. Conventional electro-optic stabilization techniques, such as Pound-Drever-Hall locking to ultra-high-finesse resonators held in a vacuum chamber, provide excellent performance but remain challenging to scale. Here, we propose and experimentally demonstrate a cavity-coupled interferometric laser stabilization technique implemented on a silicon photonic chip and integrated with a compact, scalable micro-Fabry-Pérot cavity. The vacuum-gap optical cavity operates in air, achieving a quality factor of approximately $2.0\times 10^9$ and a fractional frequency instability of $1.45\times 10^{-12}$ at one-second averaging time. Integration of the proposed technique with the compact cavity yields more than 38-fold reduction in the laser's integrated linewidth and nearly three orders of magnitude suppression of frequency noise at 10 Hz offset frequency. The hybrid-integration of the proposed photonic chip with the micro-Fabry-Pérot cavity establishes a scalable and portable route toward chip-integrated ultra-stable lasers, paving the way for precision optical systems deployable beyond laboratory environments. |
| title | Chip-scale modulation-free laser stabilization using vacuum-gap micro-Fabry-Pérot cavity |
| topic | Optics |
| url | https://arxiv.org/abs/2510.21565 |