CPT resonance generation method, CPT resonance detection method, CPT resonance generation apparatus, atomic oscillator and magnetic sensor
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United States of America Patent
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Apr 24, 2018
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app pub date -
Mar 9, 2016
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Mar 12, 2015
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Abstract
A method for generating a CPT resonance, includes applying an electric current to a laser light-emitting element, to emit laser light having at least two wavelengths. The value of a direct current component of the electric current applied to the laser light-emitting element in a first period is greater than an oscillation threshold for the laser light-emitting element, and the value of the direct current component of the electric current applied to the laser light-emitting element in a second period, following the first period, is less than the value of the direct current component of the electric current in the first period. An alkali metal atom is irradiated with the laser light, the laser light generated in the first period and the laser light generated in the second period entering the alkali metal atom repeatedly a plurality of times to generate a Ramsey resonance.
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