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Published on: March 6, 2017
Calibrated 100-dB-dynamic-range electro-optic probe for high-power microwave applications.
Dong-Joon Lee1, Jae-Yong Kwon, No-Weon Kang
1Division of Physical Metrology, Korea Research Institute of Standards and Science, 1 Doryong-dong, Yuseong-gu, Daejeon 305-340, South Korea.
Optics Express
|September 22, 2011
Summary
A novel electro-optic field probe offers high stability and a wide dynamic range for electric field measurements. Its design overcomes instability issues, making it suitable for intense field applications.
Area of Science:
- Electromagnetics and Optics
- Sensor Technology
Background:
- Electro-optic sensors are crucial for measuring electric fields.
- Instability in intense electric fields often limits sensor performance.
Purpose of the Study:
- To present a highly stable electro-optic field probe with a wide dynamic range.
- To detail the probe's modulation mechanism and overcome sensor instability.
Main Methods:
- Utilized interference and field-induced phase retardations with a fiber-mounted sensor crystal.
- Calibrated the probe up to 3.5 GHz using a micro-TEM cell and gain horn antenna.
- Implemented a real-time bias-control loop to stabilize sensor performance.
Main Results:
- Achieved over 100 dB linear dynamic range (1 V/m to > 100 kV/m).
- Overcame instability issues common in intense electric-field measurements.
- Demonstrated stabilized sensor performance.
Conclusions:
- The developed electro-optic field probe offers exceptional stability and dynamic range.
- The probe is suitable for demanding applications, including pulsed high-power microwave measurements.
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