Journal
APPLIED PHYSICS B-LASERS AND OPTICS
Volume 102, Issue 1, Pages 11-18Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00340-010-4263-8
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Funding
- European Commission (FINAQS) [012986-2 NEST]
- ESA (SAI) [20578/07/NL/VJ]
- ESF/DFG (EuroQuasar-IQS) [PE 904/2-1]
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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 19aEuro(3) 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 mu rad/Hz(1/2) 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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