High-power, low-phase-noise, frequency-agile laser system for delivering fiber-noise-canceled pulses for strontium clock atom interferometry.

• DOI: 10.48550/arxiv.2212.06298
• Publication Date: 2023-07-19
• Authors: Kenneth DeRose; Tejas Deshpande; Yiping Wang; Tim Kovachy
• Keywords: Atomic Physics (physics.atom-ph); 0103 physical sciences; FOS: Physical sciences; General Relativity and Quantum Cosmology (gr-qc); 7. Clean energy; 01 natural sciences; General Relativity and Quantum Cosmology; Physics - Optics; Physics - Atomic Physics; Optics (physics.optics)

We present a laser system for performing single-photon atom interferometry on the 698 nm clock transition in ultracold strontium. We coherently combine the power of two titanium:sapphire lasers and demonstrate chirps of 200 MHz in 2.5 ms while phase-locked to an optical reference. Moreover, we demonstrate a novel, to the best of our knowledge, scheme to deliver 4 W pulsed beams to the atoms via a mode-cleaning optical fiber using active noise cancellation.