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Development of Whispering Gallery Mode Polymeric Micro-optical Electric Field Sensors

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A Highly Sensitive and Miniature Optical Fiber Sensor for Electromagnetic Pulse Fields.

Min Zhao¹, Xing Zhou¹, Yazhou Chen¹

¹National Key Laboratory on Electromagnetic Environment Effects, Army Engineering University, No. 97 Heping West Road, Shijiazhuang 050003, China.

Sensors (Basel, Switzerland)

|December 10, 2021

Summary

New miniature optical fiber sensors accurately detect electromagnetic pulse (EMP) fields in small spaces. These novel sensors offer reliable measurements for sensitive equipment testing.

Keywords:

EMP measurement direct electro-optic conversion frequency domain linear response optical fiber sensor time domain

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Published on: January 29, 2013

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A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

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Published on: January 7, 2019

Area of Science:

Electrical Engineering
Optical Sensing
Electromagnetics

Background:

Electromagnetic pulse (EMP) field detection is crucial for assessing the environment of equipment in confined spaces.
Existing methods may lack the sensitivity or miniaturization required for specific applications.

Purpose of the Study:

To design and evaluate finger-shaped miniature optical fiber sensors for electromagnetic pulse (EMP) field measurement.
To develop sensors capable of accurately characterizing both weak and strong EMP fields.

Main Methods:

Designed two types of finger-shaped optical fiber sensors: one for weak fields and one for strong fields.
Integrated antennas with shielding shells and electro-optic converting circuits connected to optical fibers.
Conducted time and frequency domain measurements to assess sensor performance.

Main Results:

Both sensors demonstrated flat frequency responses from 100 kHz to 1 GHz (±2.3 dB for weak, ±2.9 dB for strong fields).
Detected EMP waveforms closely matched the applied standard square wave.
The strong field sensor showed linear response from 645 V/m to 83 kV/m, with a weak field sensor resolution of 13 V/m.

Conclusions:

The designed miniature optical fiber sensors exhibit excellent performance for electromagnetic pulse (EMP) field detection.
These sensors are suitable for characterizing field environments in small spaces, offering high sensitivity and accuracy.