We present a novel all-optical electric field sensor based on a proton-exchange waveguide near cut-off, centered on a few microns wide domain-inverted region in a z-cut LiNbO3 substrate. The output intensity from the waveguide is modulated by an external electric field via the electro-optic effect. We also demonstrate the sensor's performance by detecting DC fields up to 2.6 MV/m and high-frequency (1.1 GHz) fields ranging from 19 V/m to 23 kV/m. These features and the proposed design allow operating the sensor without the use of any metal antenna, thus making it suited for use in high electric field and harsh conditions-e.g. power stations and transmission lines-without any danger for the operator or risk of damage to the sensor head.

Electrode-free optical sensor for high voltage using a domain-inverted LiNbO3 waveguide near cut-off / Tulli, D; Janner, DAVIDE LUCA; Garcia Granda, M; Ricken, R; Pruneri, V.. - In: APPLIED PHYSICS. B, LASERS AND OPTICS. - ISSN 0946-2171. - 103:(2011), pp. 399-403. [10.1007/s00340-011-4433-3]

Electrode-free optical sensor for high voltage using a domain-inverted LiNbO3 waveguide near cut-off

JANNER, DAVIDE LUCA;
2011

Abstract

We present a novel all-optical electric field sensor based on a proton-exchange waveguide near cut-off, centered on a few microns wide domain-inverted region in a z-cut LiNbO3 substrate. The output intensity from the waveguide is modulated by an external electric field via the electro-optic effect. We also demonstrate the sensor's performance by detecting DC fields up to 2.6 MV/m and high-frequency (1.1 GHz) fields ranging from 19 V/m to 23 kV/m. These features and the proposed design allow operating the sensor without the use of any metal antenna, thus making it suited for use in high electric field and harsh conditions-e.g. power stations and transmission lines-without any danger for the operator or risk of damage to the sensor head.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2672328
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