Electro-optic electric-field sensors utilizing Ti∶LiNbO31×2 directional coupler with dipole antennas

Hongsik Jung

doi:10.1117/1.OE.52.6.064402

19 June 2013 Electro-optic electric-field sensors utilizing Ti∶LiNbO31×2 directional coupler with dipole antennas

Hongsik Jung

Author Affiliations +

Optical Engineering, Vol. 52, Issue 6, 064402 (June 2013). https://doi.org/10.1117/1.OE.52.6.064402

Abstract

We have demonstrated a Ti∶LiNbO ₃ electro-optic electric-field sensor based on 1×2 directional optical waveguide coupler. The symmetric geometry of the 1×2 directional coupler provided the sensor with unique characteristics of intrinsic 3-dB operating point and two complementary outputs. A DC switching voltage of ∼12 V and an extinction ratio of ∼8.1 dB were observed with the coupler at a wavelength of 1.3 μm. The minimum detectable electric fields are ∼0.99 and ∼1.67 V/m corresponding to a dynamic range of ∼29.5 and ∼25 dB at frequencies of 20 and 50 MHz, respectively. The sensors exhibit almost linear response for the applied electric-field intensity from 0.29 to 29.8 V/m .

Citation Download Citation

Hongsik Jung "Electro-optic electric-field sensors utilizing Ti∶LiNbO31×2 directional coupler with dipole antennas," Optical Engineering 52(6), 064402 (19 June 2013). https://doi.org/10.1117/1.OE.52.6.064402

Published: 19 June 2013

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