InP-Based Mach–Zehnder Modulator With Capacitively Loaded Traveling-Wave Electrodes

Author

Akiyama, Suguru ; Itoh, Hiroaki ; Sekiguchi, Shigeaki ; Hirose, Shinichi ; Takeuchi, Tatsuya ; Kuramata, Akito ; Yamamoto, Tsuyoshi

Author_Institution

Fujitsu Labs. Ltd., Atsugi

Volume

26

Issue

5

fYear

2008

fDate

3/1/2008 12:00:00 AM

Firstpage

608

Lastpage

615

Abstract

InP-based Mach-Zehnder modulators with capacitively loaded traveling-wave electrodes (CL-TWEs), which have segmented structures along the optical waveguides, are presented. Devices with various structural parameters for gap length (the length between adjacent segmented phase modulators) and total active length were fabricated and investigated both optically and electrically. Excellent characteristics such as characteristic impedance matching to 50 Omega and low electrical propagation losses were obtained. Using the optimum structures, 40- and 10-Gb/s large signal operations were successfully performed with peak-to-peak driving voltages of 3.0 and 1.2 V, respectively. The effects of structural parameters, such as gap length and total active length on electrical and optical modulation properties, are discussed.

Keywords

III-V semiconductors; Mach-Zehnder interferometers; electro-optical modulation; electrodes; indium compounds; optical fibre communication; InP; Mach-Zehnder modulator; bit rate 10 Gbit/s; bit rate 40 Gbit/s; capacitively loaded traveling-wave electrodes; characteristic impedance matching; electrical modulation properties; electrical propagation losses; electro-optic modulation; gap length; optical fiber communication; optical modulation properties; optical waveguides; segmented phase modulators; structural parameters; total active length; voltage 1.2 V; voltage 3 V; Capacitance; Electrodes; High speed optical techniques; Impedance matching; Optical modulation; Optical transmitters; Optical waveguides; Phase modulation; Structural engineering; Voltage; Electrooptic modulation; Mach–Zehnder (MZ); optical fiber communication; traveling wave;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2007.915278

Filename

4484086