Electricity: measuring and testing – Particle precession resonance – Using optical pumping or sensing device
Patent
1989-09-29
1991-07-30
Williams, Hezron E.
Electricity: measuring and testing
Particle precession resonance
Using optical pumping or sensing device
G01R 3326
Patent
active
050362780
ABSTRACT:
A radiation source (12) for optical magnetometers (10) which use helium isotopes as the resonance element (30) includes an electronically pumped semiconductor laser (12) which produces a single narrow line of radiation which is frequency stabilized to the center frequency of the helium resonance line to be optically pumped. The frequency stabilization is accomplished using electronic feedback (34, 40, 42, 44) to control a current sources (20) thus eliminating the need for mechanical frequency tuning.
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Arana Louis M.
Polatomic, Inc.
Williams Hezron E.
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