An Integrated Ultralow Noise Spiral Interferometric Laser
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2026
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| author | Loh, William Reens, David Kharas, Dave Sumant, Alkesh Belanger, Connor Briskin, Eli Gray, Dodd Medeiros, Alexander Maxson, Ryan T. Setzer, William Clements, Ethan Shin, Wonseok Juodawlkis, Paul W. Sorace-Agaskar, Cheryl Yegnanarayanan, Siva Braje, Danielle McConnell, Robert |
| author_facet | Loh, William Reens, David Kharas, Dave Sumant, Alkesh Belanger, Connor Briskin, Eli Gray, Dodd Medeiros, Alexander Maxson, Ryan T. Setzer, William Clements, Ethan Shin, Wonseok Juodawlkis, Paul W. Sorace-Agaskar, Cheryl Yegnanarayanan, Siva Braje, Danielle McConnell, Robert |
| contents | Photonic integration offers the potential to bring complex high-performance optical systems to the form factor of a compact semiconductor chip. However, the range of system functions accessible critically depends on the extent to which free-space and fiber components can be made integrable. The ultralow-expansion cavity-stabilized laser$-$often used in precision metrology, high-resolution sensors, and advanced systems in atomic physics$-$is one component that currently has no direct parallel on chip. Lasers stabilized to photonically-integrated resonators exist, but exhibit considerably higher frequency noise and are accompanied by large levels of frequency drift. We demonstrate here a new architecture for an ultranarrow linewidth integrated laser based on stabilization to a sinusoidal fringe of an interferometer having a long 25-m unbalanced delay line. Our interferometric laser not only advances the state-of-the-art for on-chip lasers, but we in addition introduce an amplitude locking scheme that greatly suppresses the laser's long-term frequency wander. We achieve a record on-chip fractional frequency noise of $5.6 \times 10^{-14}$, corresponding to a linewidth of 12 Hz centered at 1348 nm. To showcase the utility of this laser, we divide the optical carrier to microwave frequencies, demonstrating the ability to outperform state-of-the-art quartz crystal oscillators by 15 dB or more. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_16461 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | An Integrated Ultralow Noise Spiral Interferometric Laser Loh, William Reens, David Kharas, Dave Sumant, Alkesh Belanger, Connor Briskin, Eli Gray, Dodd Medeiros, Alexander Maxson, Ryan T. Setzer, William Clements, Ethan Shin, Wonseok Juodawlkis, Paul W. Sorace-Agaskar, Cheryl Yegnanarayanan, Siva Braje, Danielle McConnell, Robert Optics Photonic integration offers the potential to bring complex high-performance optical systems to the form factor of a compact semiconductor chip. However, the range of system functions accessible critically depends on the extent to which free-space and fiber components can be made integrable. The ultralow-expansion cavity-stabilized laser$-$often used in precision metrology, high-resolution sensors, and advanced systems in atomic physics$-$is one component that currently has no direct parallel on chip. Lasers stabilized to photonically-integrated resonators exist, but exhibit considerably higher frequency noise and are accompanied by large levels of frequency drift. We demonstrate here a new architecture for an ultranarrow linewidth integrated laser based on stabilization to a sinusoidal fringe of an interferometer having a long 25-m unbalanced delay line. Our interferometric laser not only advances the state-of-the-art for on-chip lasers, but we in addition introduce an amplitude locking scheme that greatly suppresses the laser's long-term frequency wander. We achieve a record on-chip fractional frequency noise of $5.6 \times 10^{-14}$, corresponding to a linewidth of 12 Hz centered at 1348 nm. To showcase the utility of this laser, we divide the optical carrier to microwave frequencies, demonstrating the ability to outperform state-of-the-art quartz crystal oscillators by 15 dB or more. |
| title | An Integrated Ultralow Noise Spiral Interferometric Laser |
| topic | Optics |
| url | https://arxiv.org/abs/2602.16461 |