PMID- 30469950
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20181126
LR  - 20190115
IS  - 1094-4087 (Electronic)
IS  - 1094-4087 (Linking)
VI  - 26
IP  - 23
DP  - 2018 Nov 12
TI  - Waveform reconstruction with a Cs based free-induction-decay magnetometer.
PG  - 30523-30531
LID - 10.1364/OE.26.030523 [doi]
AB  - We demonstrate an optically pumped magnetometer (OPM) operated in a 
      free-induction-decay (FID) configuration that is capable of tracking oscillating 
      magnetic signals in the presence of a 50 muT static field. Excellent waveform 
      reconstruction is demonstrated for low frequency modulations with respect to the 
      Nyquist limited bandwidth. A 100 pT oscillation was successfully reconstructed 
      using signal averaging, and an optimum sensitivity of 3.9 pT/Hz was measured from 
      the spectrum of the residuals relative to the sinusoidal fit. The impact of the 
      pump-probe repetition rate and spin depolarization on the frequency response of 
      the sensor is investigated in detail using miniaturized vapor cell technology, 
      with the (-3 dB) bandwidths residing beyond the Nyquist limit in each case. We 
      also discuss technical limitations associated with the magnetometer when exposed 
      to oscillating fields of sufficiently high amplitude or frequency. This is 
      discussed in the context of potential distortions arising in the reproduced 
      signals, induced by frequency modulation (FM) and aliasing artefacts.
FAU - Hunter, Dominic
AU  - Hunter D
FAU - Jimenez-Martinez, Ricardo
AU  - Jimenez-Martinez R
FAU - Herbsommer, Juan
AU  - Herbsommer J
FAU - Ramaswamy, Srinath
AU  - Ramaswamy S
FAU - Li, Wen
AU  - Li W
FAU - Riis, Erling
AU  - Riis E
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Opt Express
JT  - Optics express
JID - 101137103
EDAT- 2018/11/25 06:00
MHDA- 2018/11/25 06:01
CRDT- 2018/11/25 06:00
PHST- 2018/11/25 06:00 [entrez]
PHST- 2018/11/25 06:00 [pubmed]
PHST- 2018/11/25 06:01 [medline]
AID - 401064 [pii]
AID - 10.1364/OE.26.030523 [doi]
PST - ppublish
SO  - Opt Express. 2018 Nov 12;26(23):30523-30531. doi: 10.1364/OE.26.030523.