Free-induction-decay magnetometer based on a microfabricated Cs vapor cell
| Autor: | Jonathan D. Pritchard, D. Hunter, S. Piccolomo, Nathan Brockie, Erling Riis, Terry Dyer |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Larmor precession
Zeeman effect Materials science Magnetometer Buffer gas General Physics and Astronomy 01 natural sciences law.invention 010309 optics Free induction decay Optical pumping symbols.namesake law 0103 physical sciences symbols Atomic physics 010306 general physics Frequency modulation Light field QC |
| ISSN: | 2331-7043 |
| Popis: | We describe an optically pumped Cs magnetometer containing a 1.5 mm thick microfabricated vapor cell with nitrogen buffer gas operating in a free-induction-decay (FID) configuration. This allows us to monitor the free Larmor precession of the spin coherent Cs atoms by separating the pump and probe phases in the time domain. A single light pulse can sufficiently polarize the atomic sample however, synchronous modulation of the light field actively drives the precession and maximizes the induced spin coherence. Both amplitude and frequency modulation have been implemented with noise floors of 3 pT / √ Hz and 16 pT / √ Hz respectively within the Nyquist limited bandwidth of 500 Hz . |
| Databáze: | OpenAIRE |
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