40-Gbaud 16-QAM transmitter using tandem IQ modulators with binary driving electronic signals
Artikel i vetenskaplig tidskrift, 2010

We propose a novel 16-quadrature amplitude modulation (QAM) transmitter based on two cascaded IQ modulators driven by four separate binary electrical signals. The proposed 16-QAM transmitter features scalable configuration and stable performance with simple bias-control. Generation of 16-QAM signals at 40 Gbaud is experimentally demonstrated for the first time and visualized with a high speed constellation analyzer. The proposed modulator is also compared to two other schemes. We investigate the modulator bandwidth requirements and tolerance to accumulated chromatic dispersion through numerical simulations, and the minimum theoretical insertion attenuation is calculated analytically.


Guo-Wei Lu

Chalmers University of Technology

Mats Sköld


Pontus Johannisson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Jian Zhao

University College Cork

Martin E Sjödin

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Henrik Sunnerud


Mathias Westlund


A. D. Ellis

University College Cork

Peter Andrekson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Fotonik

Optics Express

1094-4087 (ISSN)

Vol. 18 23062-23069