Dynamical low-noise microwave source for cold-atom experiments
Rev. Sci. Instrum. 94, 074705 (2023) The generation and manipulation of ultracold atomic ensembles in the quantum regime require the application of dynamically controllable microwave fields with ultra-low noise performance. Here, we present a low-phase-noise microwave source with two independently c...
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| Main Authors: | , , , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
06-11-2023
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | Rev. Sci. Instrum. 94, 074705 (2023) The generation and manipulation of ultracold atomic ensembles in the quantum
regime require the application of dynamically controllable microwave fields
with ultra-low noise performance. Here, we present a low-phase-noise microwave
source with two independently controllable output paths. Both paths generate
frequencies in the range of $6.835\,$GHz $\pm$ $25\,$MHz for hyperfine
transitions in $^{87}$Rb. The presented microwave source combines two
commercially available frequency synthesizers: an ultra-low-noise oscillator at
$7\,$GHz and a direct digital synthesizer for radiofrequencies. We demonstrate
a low integrated phase noise of $480\,\mu$rad in the range of $10\,$Hz to
$100\,$kHz and fast updates of frequency, amplitude and phase in sub-$\mu$s
time scales. The highly dynamic control enables the generation of shaped pulse
forms and the deployment of composite pulses to suppress the influence of
various noise sources. |
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| DOI: | 10.48550/arxiv.2003.10989 |