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Optica Publishing Group
  • Journal of the Optical Society of Korea
  • Vol. 18,
  • Issue 6,
  • pp. 739-745
  • (2014)

Integrated-Optic Electric-Field Sensor Utilizing a Ti:LiNbO<sub>3</sub> Y-fed Balanced-Bridge Mach-Zehnder Interferometric Modulator With a Segmented Dipole Antenna

Open Access Open Access

Abstract

We have demonstrated a <TEX>$Ti:LiNbO_3$</TEX> electro-optic electric-field sensor utilizing a <TEX>$1{\times}2$</TEX> Y-fed balanced-bridge Mach-Zehnder interferometric (YBB-MZI) modulator, which uses a 3-dB directional coupler at the output and has two complementary output waveguides. A dc switching voltage of ~25 V and an extinction ratio of ~12.5 dB are observed at a wavelength of <TEX>$1.3{\mu}m$</TEX>. For a 20 dBm rf input power, the minimum detectable electric fields are ~8.21, 7.24, and ~13.3 V/m, corresponding to dynamic ranges of ~10, ~12, and ~7 dB at frequencies of 10, 30, and 50 MHz respectively. The sensors exhibit almost linear response for an applied electric-field intensity from 0.29 V/m to 29.8 V/m.

© 2014 Optical Society of Korea

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