Abstract

This paper investigates balanced detection schemes for optical duobinary communication systems, and compares duobinary with differential phase-shift keying (DPSK) modulation. The balanced detection schemes are evaluated in duobinary and DPSK systems limited by amplified spontaneous emission noise, narrow optical filtering, and chromatic dispersion. We also consider the optimization of duobinary generating low-pass filter. Experimental data at 10 Gb/s show that balanced detection yields a significant advantage in receiver sensitivity compared with direct detection for duobinary systems, allowing duobinary systems to approach within ${\sim} {\hbox {1.5}}$ dB the performance of DPSK. We also employ Monte Carlo simulations to evaluate balanced detection for 40 Gb/s duobinary transmission systems with narrow optical filtering designed for 50 GHz channel spacing. The simulations confirm our experimental results, and provide a more general investigation of balanced detection schemes. In particular, we propose a novel balanced detection scheme for duobinary systems designed to improve the tolerance to narrow optical filtering.

© 2011 IEEE

Experimental performance comparison of Duobinary and PSBT modulation formats for long-haul 40 Gb/s transmission on G 0.652 fibre

Erwan Pincemin, Christophe Gosset, Nassima Boudrioua, Antoine Tan, Didier Grot, and Thierry Guillossou
Opt. Express 20(27) 28171-28190 (2012)

Analysis of a WDM system with a modified duobinary modulation scheme in an optical network using EDFA

Vidhya Janakiraman, Margarat Michael, and Elizabeth Caroline Britto
Appl. Opt. 62(12) 3118-3124 (2023)

Fundamental performance limits of optical duobinary

M. Joindot, G. Bosco, A. Carena, V. Curri, and P. Poggiolini
Opt. Express 16(24) 19600-19614 (2008)

10.7 Gb/s uncompensated transmission over a 470 km hybrid fiber link with in-line SOAs using MLSE and duobinary signals

John D. Downie, Jason Hurley, and Yihong Mauro
Opt. Express 16(20) 15759-15764 (2008)

Partial bit delay correlative modulation used to improve the dispersion tolerance of an optical duobinary system

Zhongxi Zhang, Liang Chen, Xiaoyi Bao, and Ahmad Atieh
Opt. Express 16(15) 11344-11353 (2008)