Electric field sensor using multi-tapered optical fibers and electro-optic polymer

We studied photonic electric-field sensors using a 1 × 2 YBB-MZI modulator composed of two complementary outputs and a 3 dB directional coupler based on the electro-optic effect and titanium diffused lithium–niobate optical waveguides. The measured DC switching voltage and extinction ratio at the wavelength 1.3 μm were ~16.6 V and ~14.7 dB, respectively. The minimum detectable fields were ~1.12 V/m and ~3.3 V/m, corresponding to the ~22 dB and ~18 dB dynamic ranges of ~10 MHz and 50 MHz, respectively, for an rf power of 20 dBm. The sensor shows an almost linear response to the applied electric-field strength within the range of 0.29 V/m to 29.8 V/m.

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Development of an electric field sensor based on second harmonic generation with electro-optic materials

Journal of Materials Processing Technology ◽

10.1016/j.jmatprotec.2006.03.116 ◽

2007 ◽

Vol 185 (1-3) ◽

pp. 173-177 ◽

Cited By ~ 7

Author(s):

N.J. Vasa ◽

Y. Kawata ◽

R. Tanaka ◽

S. Yokoyama

Keyword(s):

Electric Field ◽

Second Harmonic Generation ◽

Harmonic Generation ◽

Second Harmonic ◽

Electric Field Sensor ◽

Electro Optic ◽

Field Sensor

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Electro-optic sensor for static fields

Applied Physics B ◽

10.1007/s00340-019-7326-5 ◽

2019 ◽

Vol 125 (11) ◽

Author(s):

J. O. Grasdijk ◽

X. F. Bai ◽

I. Engin ◽

K. Jungmann ◽

H. J. Krause ◽

...

Keyword(s):

Electric Field ◽

Electric Fields ◽

Optical Fibers ◽

Time Constant ◽

Constant Electric Field ◽

Low Frequency ◽

Glass Container ◽

Electric Field Sensor ◽

Permanent Electric Dipole Moment ◽

Electro Optic

Abstract A sensor has been developed for low frequency and DC electric fields E. The device is capable of measuring fields with $$\varDelta \mathrm{E}= 4$$ΔE=4 (1) V/cm resolution. It is based on a Y-cut Z-propagation lithium niobate electro-optic crystal. For a particular commercially available bare crystal, we achieved an in air time constant $$\tau _\mathrm{c}(\mathrm air)= 6.4(1.8)$$τc(air)=6.4(1.8) h for the decay of the electro-optic signal. This enables field monitoring for several hours. As an application, we demonstrated that a constant electric field $$E^{\mathrm{ext}} = 640$$Eext=640 V/cm applied via external electrodes to a particular spherical glass container holding an Xe/He gas mixture decays inside this cell with a time constant $$\tau _{E}^{\mathrm{glass}} = 2.5(5)$$τEglass=2.5(5) h. This is sufficient for the needs of experiments searching for a permanent electric dipole moment in $$^{129}$$129Xe. An integrated electric field sensor has been constructed which is coupled to a light source and light detectors via optical fibers. The sensor head does not contain any electrically conducting material.

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