Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 35, Issue 24, Pages 1323-1326Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2022.3205054
Keywords
Electric fields; Optical waveguides; Electric variables measurement; Transmission line measurements; Optical distortion; Microwave measurement; Optical device fabrication; Electric field; sensor; lithium niobate; broadband; high sensitivity
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A broadband integrated electric field sensor based on Lithium niobate on insulator technology is proposed and demonstrated. The sensor utilizes an asymmetrical Mach-Zehnder interferometer configuration and an array of tapered dipole antennas. Experimental results show that the fabricated sensor can accurately measure electric field strength in the frequency range of 0.1 GHz to 26.5 GHz, exhibiting high accuracy and sensitivity.
A broadband integrated electric field sensor is proposed and demonstrated based on Lithium niobate on insulator (LNOI). The sensor is realized by using an asymmetrical Mach-Zehnder interferometer configuration and an array of tapered dipole antennas. The fabricated sensor can achieve electric field sensing in the frequency range of 0.1 GHz to 26.5 GHz. For the electric field at 0.1 GHz, measurement is achieved in the amplitude range of 40 mV/m to 6 kV/m. The maximum measurable amplitude is calculated to be 28.6 kV/m. Hence, the theoretical dynamic range and the normalized sensitivity are 117 dB and 8.8 mV/m/Hz(1/2), respectively.
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