Multi-frequency telecom fibered laser system for potassium laser cooling

• URL: http://arxiv.org/abs/2109.03864v1
• Date: Wed, 8 Sep 2021 18:23:53 GMT
• Title: Multi-frequency telecom fibered laser system for potassium laser cooling
• Authors: Charbel Cherfan, Maxime Denis, Denis Bacquet, Michel Gamot, Samir Zemmouri, Isam Manai, Jean-Fran\c{c}ois Cl\'ement, Jean-Claude Garreau, Pascal Szriftgiser, Radu Chicireanu
• Abstract summary: We describe a compact and versatile multi-frequency laser system for laser-cooling potassium atoms, by frequency doubling a fiber-optic telecom beam. A final free-space SHG stage generates a single beam with typically 2.5 W at quasi-resonant frequencies. This allowed to trap up to $4times109$ $41$K atoms with fast loading times (2.5 s) at sub-Doppler temperatures of 16$mu$K.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We describe a compact and versatile multi-frequency laser system for laser-cooling potassium atoms, by frequency doubling a fiber-optic telecom beam ($\simeq 1534$ or $1540$~nm). Low-power fiber-based telecom lasers and components generate a single beam containing the cooling and repumper half frequencies, subsequently amplified by high-power amplifier. A final free-space SHG stage generates a single beam with typically 2.5 W at quasi-resonant frequencies ($\simeq 767$ or $770$~nm) with high-quality mode and ready for laser cooling. This allowed to trap up to $4\times10^9$ $^{41}$K atoms with fast loading times (2.5 s) at sub-Doppler temperatures of 16~$\mu$K. This opens promising perspectives towards versatile and transportable ultracold atom setups.

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