Comb-assisted ultrastable laser system for quantum technologies

Michele Giunta; Martin Wolferstetter; Nikolai Lilienfein; Simon Holzberger; Sarah Saint-Jalm; Maurice Lessing; Marc Fischer; Ronald Holzwarth

doi:10.1117/12.2582549

5 March 2021 Comb-assisted ultrastable laser system for quantum technologies

Michele Giunta, Martin Wolferstetter, Nikolai Lilienfein, Simon Holzberger, Sarah Saint-Jalm, Maurice Lessing, Marc Fischer, Ronald Holzwarth

Author Affiliations +

Proceedings Volume 11700, Optical and Quantum Sensing and Precision Metrology; 1170037 (2021) https://doi.org/10.1117/12.2582549
Event: SPIE OPTO, 2021, Online Only

Abstract

Quantum technologies are nowadays emerging as enabling tools for practical applications, such as quantum sensing, quantum computing and quantum metrology. Lasers play a central role in many of these technological platforms, e.g. for atomic clocks, ion-based or neutral atom-based quantum computers or atom interferometers. Here we present a complete laser system to cool, trap and control strontium atoms in an optical lattice or in tweezer arrays. A sub-Hz linewidth master laser, locked to a high-finesse optical cavity provides the frequency reference for an ultra-low noise comb. The rack-mounted laser system consists of all cooling, repumping, and clock lasers stabilized to the optical frequency comb. Each of the involved laser frequencies can therefore be tuned and mapped in the frequency domain with a high degree of stability. The system is controlled via a software interface, allowing to operate the cold-atom-based physics package autonomously. The system is tailored for the operation of 88Sr or 87Sr optical lattice clocks, or for quantum computing applications, but other sub-Hz lasers could be obtained by phase locking additional clock laser frequencies to the ultra-stable comb, enabling convenient and accurate optical frequency ratio measurements. The laser system architecture and the relevant characterization measurements will be presented, proposing some user-cases such as quantum computing and atom interferometry on strontium atoms. This represents a technological leap for quantum optics, allowing to explore further applications of quantum sensors outside a traditional lab.

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Citation Download Citation

Michele Giunta, Martin Wolferstetter, Nikolai Lilienfein, Simon Holzberger, Sarah Saint-Jalm, Maurice Lessing, Marc Fischer, and Ronald Holzwarth "Comb-assisted ultrastable laser system for quantum technologies", Proc. SPIE 11700, Optical and Quantum Sensing and Precision Metrology, 1170037 (5 March 2021); https://doi.org/10.1117/12.2582549

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KEYWORDS

Laser systems engineering

Quantum computing

Chemical species

Computing systems

Laser stabilization

Clocks

Control systems

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