Open AccessW-band optical modulators using electro-optic polymer waveguides and patch antenna arrays
Author(s) -
Tatsuru Kaji,
Isao Morohashi,
Yukihiro Tominari,
Norihiko Sekine,
Toshiki Yamada,
Akira Otomo
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.434028
Subject(s) - materials science , cladding (metalworking) , optics , optoelectronics , optical fiber , antenna (radio) , waveguide , sideband , radio frequency , telecommunications , physics , computer science , metallurgy
In this study, W-band (75-110 GHz) antenna-coupled optical modulators with a cyclo-olefin polymer (COP) lower cladding, an electro-optic (EO) polymer waveguide, and a gap-embedded patch antenna array were fabricated using a transfer and bonding method of a poled EO polymer film. A carrier-to-sideband ratio (CSR) of 56 dB corresponding to an optical phase shift of 3 mrad was obtained under irradiation with 100 GHz electromagnetic waves with a power of 12.8 W/m 2 . Our devices have the potential to achieve highly efficient wireless-optical signal conversion in radio-over-fiber (RoF) systems.