Low-Chirp 85-Gb/s Duobinary Modulator in InP Using Electroabsorption Modulators

Author

Doerr, Christopher R. ; Raybon, Gregory ; Zhang, Liming ; Buhl, Larry L. ; Adamiecki, Andrew L. ; Sinsky, Jeffrey H. ; Sauer, Nicolaus J.

Author_Institution

Bell Labs., Alcatel-Lucent, Holmdel, NJ, USA

Volume

21

Issue

17

fYear

2009

Firstpage

1199

Lastpage

1201

Abstract

In 2005, Griffin showed that an InP phase-shift-keying/duobinary Mach-Zehnder interferometer (MZI) modulator could achieve good transmission performance at 10 Gb/s, despite modest residual amplitude modulation in the phase modulators in the MZI (ratio of real to imaginary part of index change was ~0.1). Here we show that even strong amplitude modulation in the ldquophaserdquo modulators (ratio of real to imaginary part of index change is ~1.0) gives good transmission performance. Allowing for strong amplitude modulation allows a significant increase in modulator bandwidth. We demonstrate low-chirp 85.4-Gb/s optical duobinary generation in a fully packaged InP photonic integrated circuit.

Keywords

III-V semiconductors; Mach-Zehnder interferometers; amplitude modulation; chirp modulation; electro-optical modulation; electroabsorption; indium compounds; integrated optics; optical communication equipment; optical modulation; phase shift keying; InP; InP photonic integrated circuit; MZI; Mach-Zehnder interferometer; amplitude modulation; bit rate 10 Gbit/s; bit rate 85 Gbit/s; bit rate 85.4 Gbit/s; duobinary modulator; electroabsorption modulator; modulator bandwidth; optical duobinary generation; phase-shift-keying; Chirp; electroabsorption; integrated optics; modulators; optical duobinary; quantum confined Stark effect;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2009.2024165

Filename

5061525