title: Polymer waveguide integrated-optic current transducers.
abstract: 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.
authors.affiliation: School of Electrical Engineering and Graduate School of Cogno-Mechatronics Engineering, Pusan National University, Pusan (Busan) 609-735, South Korea. mincheoloh@pusan.ac.kr
authors.forename: Min-Cheol
authors.initials: MC
authors.lastname: Oh
authors.forename: Woo-Sung
authors.initials: WS
authors.lastname: Chu
authors.forename: Kyung-Jo
authors.initials: KJ
authors.lastname: Kim
authors.forename: Jun-Whee
authors.initials: JW
authors.lastname: Kim