Open AccessPolymer waveguide integrated-optic current transducers
Author(s) -
MinCheol Oh,
Woo-Sung Chu,
Kyung-Jo Kim,
Jun-Whee Kim
Publication year - 2011
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.009392
Subject(s) - polarizer , interferometry , optics , polarization (electrochemistry) , dual polarization interferometry , transducer , materials science , optical path , optical path length , optoelectronics , waveguide , linearity , physics , computer science , birefringence , acoustics , telecommunications , chemistry , quantum mechanics , antenna (radio)
Various functional optical devices are integrated on a single chip in order to construct optical current transducers based on polarization rotated reflection interferometry, which consists of polarization maintaining 3-dB couplers, TE-pass polarizers, TE/TM polarization converters, and thermo-optic phase modulators. By virtue of the device integration, the sensor exhibited good linearity, and excellent accuracy with an error less than 0.2%. The integrated-optic device provides inherent polarization maintaining characteristics and precise controllability of the optical path length in the interferometric sensor. Single chip integration reduces the complexity of the interferometry, and enables mass-production of low-cost high performance current sensors.