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.
|Titolo:||Electrode-free optical sensor for high voltage using a domain-inverted LiNbO3 waveguide near cut-off|
|Data di pubblicazione:||2011|
|Digital Object Identifier (DOI):||10.1007/s00340-011-4433-3|
|Appare nelle tipologie:||1.1 Articolo in rivista|
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