A portable laser system for high-precision atom interferometry experiments |
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Authors: | M. Schmidt M. Prevedelli A. Giorgini G. M. Tino A. Peters |
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Affiliation: | 1.Institut für Physik,Humboldt-Universit?t zu Berlin,Berlin,Germany;2.Dipartimento di Fisica,Università di Bologna,Bologna,Italy;3.Dipartimento di Fisica e Astronomia and LENS,Università di Firenze-INFN,Sesto Fiorentino (Firenze),Italy |
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Abstract: | We present a modular rack-mounted laser system for the cooling and manipulation of neutral rubidium atoms which has been developed for a portable gravimeter based on atom interferometry that will be capable of performing high-precision gravity measurements directly at sites of geophysical interest. This laser system is constructed in a compact and mobile design so that it can be transported to different locations, yet it still offers improvements over many conventional laboratory-based laser systems. Our system is contained in a standard 19″ rack and emits light at five different frequencies simultaneously on up to 12 fibre ports at a total output power of 800 mW. These frequencies can be changed and switched between ports in less than a microsecond. The setup includes two phase-locked diode lasers with a phase noise spectral density of less than 1 μrad/Hz1/2 in the frequency range in which our gravimeter is most sensitive to noise. We characterise this laser system and evaluate the performance limits it imposes on an interferometer. |
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