Abstract
We design a high dynamic range electric field sensor based on domain inverted electro-optic (E-O) polymer Y-fed directional coupler for electromagnetic wave detection. This electrode-less, all optical, wideband electrical field sensor is fabricated using standard processing for E-O polymer photonic devices. Experimental results demonstrate effective detection of electric field from 16.7V/m to 750KV/m at a frequency of 1GHz, and spurious free measurement range of 70dB.
Highlights
There has been rapidly increasing interest in electric field (E-field) sensors during last decades [1,2,3,4]
We design a high dynamic range electric field sensor based on domain inverted electro-optic (E-O) polymer Y-fed directional coupler for electromagnetic wave detection
Further optimization of E-field sensor through fine tuning the fabrication processes, improving the poling efficiency, and reducing the optical waveguide loss should allow better performance in sensitivity
Summary
There has been rapidly increasing interest in electric field (E-field) sensors during last decades [1,2,3,4]. Photonic E-field sensors exhibit significant advantages with respect to the electronic ones due to their smaller size, lighter weight, higher sensitivity, and extremely broad bandwidth. Because of these exclusive merits, photonic E-field sensors based on integrated optical devices and optical fibers have emerged in the last ten years [2, 3, 5, 6]. These photonic E-field sensors using Mach-Zehnder (MZ) interferometer or ring resonator, are facing a significant challenge in its spurious free dynamic range (SFDR) for high fidelity measurement of the EM waves. The optimum bias point could drift slowly due to charging effects [8], ambient changes such as the variation of temperature, optical power, and wavelength shifts [9]
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