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Development of Whispering Gallery Mode Polymeric Micro-optical Electric Field Sensors
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Published on: January 29, 2013

Polymer waveguide integrated-optic current transducers.

Min-Cheol Oh1, Woo-Sung Chu, Kyung-Jo Kim

  • 1School of Electrical Engineering and Graduate School of Cogno-Mechatronics Engineering, Pusan National University, Pusan (Busan) 609-735, South Korea. mincheoloh@pusan.ac.kr

Optics Express
|June 7, 2011
PubMed
Summary
This summary is machine-generated.

This study presents an integrated optical current transducer using polarization interferometry. The device offers high accuracy and linearity, enabling cost-effective mass production of advanced current sensors.

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Area of Science:

  • Photonics and Optical Engineering
  • Integrated Optics
  • Sensor Technology

Background:

  • Traditional current sensors face limitations in accuracy and cost.
  • Optical current transducers offer advantages in high-voltage environments.
  • Integration of optical devices on a single chip is a key technological advancement.

Purpose of the Study:

  • To develop a novel optical current transducer by integrating various functional optical devices on a single chip.
  • To leverage polarization rotated reflection interferometry for enhanced current sensing.
  • To demonstrate a cost-effective and high-performance solution for current measurement.

Main Methods:

  • Fabrication of an integrated-optic device comprising polarization maintaining 3-dB couplers, TE-pass polarizers, TE/TM polarization converters, and thermo-optic phase modulators.
  • Utilizing polarization rotated reflection interferometry for sensing.
  • Single-chip integration to reduce complexity and enhance performance.

Main Results:

  • The integrated sensor demonstrated excellent linearity and high accuracy, with measurement errors below 0.2%.
  • The device inherently possesses polarization maintaining characteristics.
  • Precise controllability of the optical path length within the interferometric sensor was achieved.

Conclusions:

  • Single-chip integration significantly simplifies optical interferometry for current sensing.
  • The developed device enables mass production of low-cost, high-performance optical current transducers.
  • This technology offers a promising solution for advanced electrical grid monitoring.