Open AccessNumerical analyses of optical loss and modulation bandwidth of an InP organic hybrid optical modulator
Author(s) -
N. Sekine,
Kasidit Toprasertpong,
Shinichi Takagi,
Mitsuru Takenaka
Publication year - 2020
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.402470
Subject(s) - materials science , optics , optical modulator , modulation (music) , bandwidth (computing) , optoelectronics , insertion loss , waveguide , optical modulation amplitude , phase modulation , optical amplifier , physics , telecommunications , computer science , laser , phase noise , acoustics
We numerically analyzed the modulation characteristics of an InP organic hybrid (IOH) optical modulator consisting of an InP slot waveguide and an electro-optic (EO) polymer. Since InP has a higher electron mobility and a lower electron-induced free-carrier absorption than Si, the series resistance of an InP slot waveguide can be significantly reduced with relatively smaller optical loss than an Si slot waveguide. As a result, the trade-off between optical loss and modulation bandwidth can be remarkably improved compared with a Si organic hybrid (SOH) optical modulator. When the modulation bandwidth was designed to be 100 GHz, the optical loss of the IOH modulator was 13-fold smaller than that of the SOH one. The simulation of the eye diagram revealed that the improved optical modulation amplitude enabled the clear eye opening with a 100 Gbps non return-to-zero signal using the IOH modulator. The IOH integration is promising for a high-speed modulator with low energy consumption beyond 100 Gbps.