Quasi-continuous sub-$μ$K strontium source without a high-finesse cavity stabilized laser
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| Main Authors: | , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866911519021727744 |
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| author | Boughdachi, Sana Heizenreder, Benedikt Sitaram, Ananya Dierikx, Erik Xie, Yan Klemann, Sander Klop, Paul Koelemeij, Jeroen Wilk, Rafał Schreck, Florian Brodschelm, Andreas |
| author_facet | Boughdachi, Sana Heizenreder, Benedikt Sitaram, Ananya Dierikx, Erik Xie, Yan Klemann, Sander Klop, Paul Koelemeij, Jeroen Wilk, Rafał Schreck, Florian Brodschelm, Andreas |
| contents | We demonstrate a quasi-continuous sub-$μ$K strontium source achieved without the use of a high-finesse cavity-locked laser. Our frequency reference is based on a dispersion-optimized, fiber-based frequency comb that enables sub-kHz linewidths. The long-term stability of the comb is defined by an external RF reference: either a 10 MHz RF signal from the Dutch Metrology Institute (VSL), or a tunable RF source whose long-term stability is maintained by monitoring and stabilizing the position of a narrow-line magneto-optical trap (MOT). The comb-stabilized system is benchmarked against a conventional cavity-locked laser and achieves comparable performance in broadband and single-frequency MOTs using the narrow $^1$S$_0$ $\rightarrow$ $^3$P$_1$ laser cooling transition. We generate high-flux, sub-$μ$K samples of all three bosonic strontium isotopes and demonstrate quasi-continuous outcoupling from the MOT. These results highlight the system's suitability for compact, robust, and field-deployable continuous cold atom devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_23617 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Quasi-continuous sub-$μ$K strontium source without a high-finesse cavity stabilized laser Boughdachi, Sana Heizenreder, Benedikt Sitaram, Ananya Dierikx, Erik Xie, Yan Klemann, Sander Klop, Paul Koelemeij, Jeroen Wilk, Rafał Schreck, Florian Brodschelm, Andreas Atomic Physics Quantum Gases We demonstrate a quasi-continuous sub-$μ$K strontium source achieved without the use of a high-finesse cavity-locked laser. Our frequency reference is based on a dispersion-optimized, fiber-based frequency comb that enables sub-kHz linewidths. The long-term stability of the comb is defined by an external RF reference: either a 10 MHz RF signal from the Dutch Metrology Institute (VSL), or a tunable RF source whose long-term stability is maintained by monitoring and stabilizing the position of a narrow-line magneto-optical trap (MOT). The comb-stabilized system is benchmarked against a conventional cavity-locked laser and achieves comparable performance in broadband and single-frequency MOTs using the narrow $^1$S$_0$ $\rightarrow$ $^3$P$_1$ laser cooling transition. We generate high-flux, sub-$μ$K samples of all three bosonic strontium isotopes and demonstrate quasi-continuous outcoupling from the MOT. These results highlight the system's suitability for compact, robust, and field-deployable continuous cold atom devices. |
| title | Quasi-continuous sub-$μ$K strontium source without a high-finesse cavity stabilized laser |
| topic | Atomic Physics Quantum Gases |
| url | https://arxiv.org/abs/2507.23617 |