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Optical DC electric field sensing based on the Pockels effect using bismuth germanate crystals
Applied Optics
|August 5, 2020
Summary
This study introduces a novel optical electric field sensor using a rotating bismuth germanate crystal to accurately measure DC electric fields, overcoming space charge issues. The sensor achieves a precision error within ±0.1%.
Area of Science:
- Electrical Engineering
- Optoelectronics
- Physics
Background:
- Direct current (DC) electric field measurements are challenged by space charge accumulation.
- Distinguishing DC signals from output noise complicates accurate electric field measurement.
Purpose of the Study:
- To develop a novel optical electric field sensor for precise DC electric field measurement.
- To address and mitigate issues like space charge accumulation in DC electric field sensing.
Main Methods:
- Utilized the Pockels effect for optical sensing.
- Employed a rotating bismuth germanate crystal.
- Performed theoretical derivation and signal optimization to eliminate interference.
Main Results:
- Successfully developed an optical electric field sensor for DC measurements.
- The proposed sensor effectively eliminates the influence of space charge accumulation.
- Achieved high precision with a measurement error within ±0.1%.
Conclusions:
- The novel optical electric field sensor is suitable for accurate DC electric field measurement.
- The Pockels effect-based sensor offers a viable solution to persistent measurement challenges.
