volume | PIER Journals

Abstract

Conventional fiber-optic measurement systems for pulsed electromagnetic fields are limited by power-supply instability due to the temperature sensitivity of photocells. To address this issue, we developed a highly reliable broadband fiber-optic transmission system featuring a hybrid power supply. In our design, a lithium battery serves as the primary power source for the optical transmitter, while a compact photocell provides short-term supplemental power and simultaneously recharges the battery. An additional shunt resistor (5-50 Ω) is added to avoid damping oscillations. Results: The system achieves a -3 dB bandwidth from 5 Hz to 122 MHz. The optical transmitter volume is reduced to one-fifth of a previous design. Ten repeated electric-field measurements show relative errors below 3%. Conclusion: The proposed system offers stable operation, low power consumption, wide dynamic range, and strong anti-interference capability, making it well-suited for harsh electromagnetic environments.

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Mr. Lichao Zhang

Dr. Zheng Sun

Dr. Qi Zhang

Dr. Lihua Shi