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A simple, powerful diode laser system for atomic physics

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Abstract

External-cavity diode lasers are ubiquitous in atomic physics and a wide variety of other scientific disciplines, due to their excellent affordability, coherence length, and versatility. However, for higher-power applications, the combination of seed lasers, injection-locking and amplifiers can rapidly become expensive and complex. Here we present a high-power, single-diode laser design with specifications: ${\gt}{{210}}\;{\rm{mW}}$, 100 ms-linewidth $(427 \pm 7) \;{\rm{kHz}}$, ${\gt}{{99}}\%$ mode purity, 10 GHz mode-hop-free tuning range, and 12 nm coarse tuning. Simple methods are outlined to determine the spectral purity and linewidth with minimal additional infrastructure. The laser has sufficient power to collect ${10^{10}}\,^{87}{\rm{Rb}}$ atoms in a single-chamber vapor-loaded magneto-optical trap. With appropriate diodes and feedback, the system could be easily adapted to other atomic species and diode laser architectures.

© 2021 Optical Society of America

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Data Availability

Data underlying the results presented in this paper are available in Ref. [56].

56. A. Daffurn and A. Arnold, “A simple, powerful diode laser system for atomic physics,” University of Strathclyde, 18 June 2021, https://doi.org/10.15129/53bc86dd-e859-4eac-824c-0273d4667989.

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