Nd:LNA laser optical pumping of4He: Application to space magnetometers
作者:
R. E. Slocum,
L. D. Schearer,
P. Tin,
R. Marquedant,
期刊:
Journal of Applied Physics
(AIP Available online 1988)
卷期:
Volume 64,
issue 12
页码: 6615-6617
ISSN:0021-8979
年代: 1988
DOI:10.1063/1.342042
出版商: AIP
数据来源: AIP
摘要:
We have observed Hanle signals andn=0,p=1 parametric resonances of 23S1metastable helium atoms in a discharge cell by optically pumping the helium atoms with a tunable Nd:LNA laser. These resonances were used to construct a sensitive magnetometer for the measurement of very small magnetic fields. Since magnetometer sensitivity is proportional to the slope of the parametric resonance signal (signal amplitude divided by linewidth), the slopes for single‐line laser pumping were compared with similar quantities obtained from conventional helium lamp pumping. Laser pumping yielded 45 times greater slopes with comparable power requirements, thus establishing the potential for developing ultrasensitive resonance magnetometers using single‐line laser pumping.
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