Measurement of Linearly Polarized Light Rotation Applied in Atomic Magnetometer

Qiang Liu; Yu Dan Sun; Qiang Huang; Xian Jin Zeng; Jun Hai Zhang; Wei Min Sun

doi:10.4028/www.scientific.net/AMR.753-755.2149

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 753-755Measurement of Linearly Polarized Light Rotation...

Measurement of Linearly Polarized Light Rotation Applied in Atomic Magnetometer

Abstract:

The measurement of linearly polarized light rotation is the key technique in atomic magnetometer. It influences the sensitivity of atomic magnetometer directly. The basic principle of polarizer beam splitter detecting was analyzed. The ZF7 optical glass and solenoid were used to generate standard small angle based on Faraday effect. The signal of AC rotational angle was extracted by lock-in amplifier. The experiment proved that the method can measure 8×10^-7rad small optical rotation. As the linearly polarized light rotation is 20mrad in atomic magnetometer, the signal to noise ratio reaches 25000.

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Advanced Materials Research (Volumes 753-755)

Pages:

2149-2152

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.753-755.2149

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Online since:

August 2013

Authors:

Qiang Liu, Yu Dan Sun, Qiang Huang, Xian Jin Zeng, Jun Hai Zhang, Wei Min Sun

Keywords:

Atomic Magnetometer, Faraday Effect, Lock-In Amplifier, Verdet Constant

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