TY - GEN
T1 - Polarization angle detection method of high stability light based on faraday modulation
AU - Ye, Wen
AU - Wang, Bo
AU - Cai, Chenguang
N1 - Publisher Copyright:
© 2020 IEEE.
PY - 2020/5
Y1 - 2020/5
N2 - Faraday modulation detection method uses magneto-optical rotation effect to modulate the polarization direction of linearly polarized light. Due to the fact that high-frequency modulation can suppress low frequency noise, this method is widely used in ultra-high sensitive inertial measurement or magnetic field. However, the instability of modulation amplitude and the small fluctuation of incident light intensity affect the measurement accuracy of the atomic sensors. In this paper, the first and second harmonic signals are demodulated by lock-in amplifier, and the real-time intensity signal of Faraday modulator is used to deal with the problem. Finally, polarization rotation angle is not affected by modulation amplitude and intensity fluctuation, which can significantly improve the long-term stability and measurement accuracy of the system.
AB - Faraday modulation detection method uses magneto-optical rotation effect to modulate the polarization direction of linearly polarized light. Due to the fact that high-frequency modulation can suppress low frequency noise, this method is widely used in ultra-high sensitive inertial measurement or magnetic field. However, the instability of modulation amplitude and the small fluctuation of incident light intensity affect the measurement accuracy of the atomic sensors. In this paper, the first and second harmonic signals are demodulated by lock-in amplifier, and the real-time intensity signal of Faraday modulator is used to deal with the problem. Finally, polarization rotation angle is not affected by modulation amplitude and intensity fluctuation, which can significantly improve the long-term stability and measurement accuracy of the system.
KW - Faraday Modulator
KW - Fluctuation of Light Intensity
KW - Polarimeter
KW - Polarization Angle of Light
UR - https://www.scopus.com/pages/publications/85088322899
U2 - 10.1109/I2MTC43012.2020.9128390
DO - 10.1109/I2MTC43012.2020.9128390
M3 - Conference contribution
AN - SCOPUS:85088322899
T3 - I2MTC 2020 - International Instrumentation and Measurement Technology Conference, Proceedings
BT - I2MTC 2020 - International Instrumentation and Measurement Technology Conference, Proceedings
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2020 IEEE International Instrumentation and Measurement Technology Conference, I2MTC 2020
Y2 - 25 May 2020 through 29 May 2020
ER -