Open AccessEfficiently poled electro-optic polymer modulators
Author(s) -
Feng Qiu,
Shiyoshi Yokoyama
Publication year - 2016
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.24.019020
Subject(s) - materials science , poling , optics , waveguide , figure of merit , optical modulator , insertion loss , interferometry , polymer , electro optic modulator , phase modulation , refractive index , optoelectronics , dielectric , physics , phase noise , composite material , ferroelectricity
A titanium dioxide (TiO 2 ) / electro-optic (EO) polymer hybrid waveguide modulator was designed and fabricated. This modulator possessed a significant advantage for realizing high poling efficiency regardless of the EO polymer resistivity. The in-device EO coefficient was measured to be 100 pm/V, which was 32% higher than that of the thin polymer film. As a result, the phase modulator displayed a VπL figure of merit of 3.5 V∙cm at 1550 nm, which can be reduced further in a push-pull Mach-Zehnder interferometer structure. Temporal stability test of the modulator at 85°C indicated only 8% change of Vπ over 500 hours. The propagation loss in the waveguide was measured as ~3 dB/cm.