Polymeric Integrated-Optic Bias Chip for Optical Voltage Transducers

Author

Woo-Sung Chu ; Sung-Wook Heo ; Min-Cheol Oh

Author_Institution

Sch. of Electr. Eng., Pusan Nat. Univ., Busan, South Korea

Volume

32

Issue

24

fYear

2014

fDate

Dec.15, 15 2014

Firstpage

4730

Lastpage

4733

Abstract

The operating bias point of optical voltage transducers (OVTs) must be adjusted to a quadrature phase point through the compensation of residual birefringence induced by the optical fiber and sensor head. An integrated optical device consisting of a polymeric waveguide 3-dB coupler, TE-pass polarizer, thermo-optic phase modulator, and polarization converter was proposed for adjusting the operating bias point. A high-voltage sensor probe was prepared with a LiTaO₃ electro-optic crystal sandwiched by Teflon spacers. The operating point control was confirmed by measuring the output polarization change on the Poincaré sphere. Preliminary OVT experiment was performed by applying a high-voltage signal of 60 Hz, 4 kV_pp, and the sensor exhibited linear response with a sensitivity of 9.4 mrad/kV.

Keywords

birefringence; electro-optical devices; fibre optic sensors; high-voltage engineering; integrated optics; lithium compounds; optical control; optical fibre couplers; optical modulation; optical polarisers; optical polymers; phase modulation; thermo-optical devices; transducers; LiTaO₃; LiTaO₃ electro-optic crystal; OVT experiment; Poincaré sphere; TE-pass polarizer; Teflon spacers; frequency 60 Hz; high-voltage sensor probe; high-voltage signal; integrated optical device; linear response; operating bias point; operating point control; optical fiber; optical voltage transducers; output polarization change; polarization converter; polymeric integrated-optic bias chip; polymeric waveguide coupler; quadrature phase point; residual birefringence compensation; sensor head; thermo-optic phase modulator; voltage 4 kV; Integrated optics; Optical device fabrication; Optical feedback; Optical polarization; Optical sensors; Optical waveguides; Polymers; Integrated optics; optical sensing and sensors; polymer waveguides;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2014.2366111

Filename

6955893