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Optical Engineering

Electro-optic electric-field sensors utilizing Ti∶LiNbO31×2 directional coupler with dipole antennas
Author(s): Hongsik Jung
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Paper Abstract

We have demonstrated a TiLiNbO 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 .

Paper Details

Date Published: 19 June 2013
PDF: 7 pages
Opt. Eng. 52(6) 064402 doi: 10.1117/1.OE.52.6.064402
Published in: Optical Engineering Volume 52, Issue 6
Show Author Affiliations
Hongsik Jung, Hongik Univ. (Korea, Republic of)

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